1/*-
2 * Copyright (c) 1997 Nicolas Souchu
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 *
27 */
28
29#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 1997 Nicolas Souchu
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 *
27 */
28
29#include <sys/cdefs.h>
|
30__FBSDID("$FreeBSD: head/sys/dev/ppbus/ppb_1284.c 119418 2003-08-24 17:55:58Z obrien $");
| 30__FBSDID("$FreeBSD: head/sys/dev/ppbus/ppb_1284.c 185003 2008-11-16 17:42:02Z jhb $");
|
31
32/*
33 * General purpose routines for the IEEE1284-1994 Standard
34 */
35
36#include "opt_ppb_1284.h"
37
38#include <sys/param.h>
39#include <sys/systm.h>
40#include <sys/bus.h>
41
42
43#include <dev/ppbus/ppbconf.h>
44#include <dev/ppbus/ppb_1284.h>
45
46#include "ppbus_if.h"
47
48#include <dev/ppbus/ppbio.h>
49
50#define DEVTOSOFTC(dev) ((struct ppb_data *)device_get_softc(dev))
51
52/*
53 * do_1284_wait()
54 *
55 * Wait for the peripherial up to 40ms
56 */
57static int
58do_1284_wait(device_t bus, char mask, char status)
59{
60 return (ppb_poll_bus(bus, 4, mask, status, PPB_NOINTR | PPB_POLL));
61}
62
63static int
64do_peripheral_wait(device_t bus, char mask, char status)
65{
66 return (ppb_poll_bus(bus, 100, mask, status, PPB_NOINTR | PPB_POLL));
67}
68
69#define nibble2char(s) (((s & ~nACK) >> 3) | (~s & nBUSY) >> 4)
70
71/*
72 * ppb_1284_reset_error()
73 *
74 * Unconditionaly reset the error field
75 */
76static int
77ppb_1284_reset_error(device_t bus, int state)
78{
79 struct ppb_data *ppb = DEVTOSOFTC(bus);
80
81 ppb->error = PPB_NO_ERROR;
82 ppb->state = state;
83
84 return (0);
85}
86
87/*
88 * ppb_1284_get_state()
89 *
90 * Get IEEE1284 state
91 */
92int
93ppb_1284_get_state(device_t bus)
94{
| 31
32/*
33 * General purpose routines for the IEEE1284-1994 Standard
34 */
35
36#include "opt_ppb_1284.h"
37
38#include <sys/param.h>
39#include <sys/systm.h>
40#include <sys/bus.h>
41
42
43#include <dev/ppbus/ppbconf.h>
44#include <dev/ppbus/ppb_1284.h>
45
46#include "ppbus_if.h"
47
48#include <dev/ppbus/ppbio.h>
49
50#define DEVTOSOFTC(dev) ((struct ppb_data *)device_get_softc(dev))
51
52/*
53 * do_1284_wait()
54 *
55 * Wait for the peripherial up to 40ms
56 */
57static int
58do_1284_wait(device_t bus, char mask, char status)
59{
60 return (ppb_poll_bus(bus, 4, mask, status, PPB_NOINTR | PPB_POLL));
61}
62
63static int
64do_peripheral_wait(device_t bus, char mask, char status)
65{
66 return (ppb_poll_bus(bus, 100, mask, status, PPB_NOINTR | PPB_POLL));
67}
68
69#define nibble2char(s) (((s & ~nACK) >> 3) | (~s & nBUSY) >> 4)
70
71/*
72 * ppb_1284_reset_error()
73 *
74 * Unconditionaly reset the error field
75 */
76static int
77ppb_1284_reset_error(device_t bus, int state)
78{
79 struct ppb_data *ppb = DEVTOSOFTC(bus);
80
81 ppb->error = PPB_NO_ERROR;
82 ppb->state = state;
83
84 return (0);
85}
86
87/*
88 * ppb_1284_get_state()
89 *
90 * Get IEEE1284 state
91 */
92int
93ppb_1284_get_state(device_t bus)
94{
|
95 return (DEVTOSOFTC(bus)->state);
| 95
96 return (DEVTOSOFTC(bus)->state);
|
96}
97
98/*
99 * ppb_1284_set_state()
100 *
101 * Change IEEE1284 state if no error occured
102 */
103int
104ppb_1284_set_state(device_t bus, int state)
105{
106 struct ppb_data *ppb = DEVTOSOFTC(bus);
107
108 /* call ppb_1284_reset_error() if you absolutly want to change
109 * the state from PPB_ERROR to another */
110 if ((ppb->state != PPB_ERROR) &&
111 (ppb->error == PPB_NO_ERROR)) {
112 ppb->state = state;
113 ppb->error = PPB_NO_ERROR;
114 }
115
116 return (0);
117}
118
119static int
120ppb_1284_set_error(device_t bus, int error, int event)
121{
122 struct ppb_data *ppb = DEVTOSOFTC(bus);
123
124 /* do not accumulate errors */
125 if ((ppb->error == PPB_NO_ERROR) &&
126 (ppb->state != PPB_ERROR)) {
127 ppb->error = error;
128 ppb->state = PPB_ERROR;
129 }
130
131#ifdef DEBUG_1284
132 printf("ppb1284: error=%d status=0x%x event=%d\n", error,
133 ppb_rstr(bus) & 0xff, event);
134#endif
135
136 return (0);
137}
138
139/*
140 * ppb_request_mode()
141 *
142 * Converts mode+options into ext. value
143 */
144static int
145ppb_request_mode(int mode, int options)
146{
147 int request_mode = 0;
148
149 if (options & PPB_EXTENSIBILITY_LINK) {
150 request_mode = EXT_LINK_1284_NORMAL;
151
152 } else {
153 switch (mode) {
154 case PPB_NIBBLE:
155 request_mode = (options & PPB_REQUEST_ID) ?
156 NIBBLE_1284_REQUEST_ID :
157 NIBBLE_1284_NORMAL;
158 break;
159 case PPB_PS2:
160 request_mode = (options & PPB_REQUEST_ID) ?
161 BYTE_1284_REQUEST_ID :
162 BYTE_1284_NORMAL;
163 break;
164 case PPB_ECP:
165 if (options & PPB_USE_RLE)
166 request_mode = (options & PPB_REQUEST_ID) ?
167 ECP_1284_RLE_REQUEST_ID :
168 ECP_1284_RLE;
169 else
170 request_mode = (options & PPB_REQUEST_ID) ?
171 ECP_1284_REQUEST_ID :
172 ECP_1284_NORMAL;
173 break;
174 case PPB_EPP:
175 request_mode = EPP_1284_NORMAL;
176 break;
177 default:
178 panic("%s: unsupported mode %d\n", __func__, mode);
179 }
180 }
181
182 return (request_mode);
183}
184
185/*
186 * ppb_peripheral_negociate()
187 *
188 * Negociate the peripheral side
189 */
190int
191ppb_peripheral_negociate(device_t bus, int mode, int options)
192{
193 int spin, request_mode, error = 0;
194 char r;
195
196 ppb_set_mode(bus, PPB_COMPATIBLE);
197 ppb_1284_set_state(bus, PPB_PERIPHERAL_NEGOCIATION);
198
199 /* compute ext. value */
200 request_mode = ppb_request_mode(mode, options);
201
202 /* wait host */
203 spin = 10;
204 while (spin-- && (ppb_rstr(bus) & nBUSY))
205 DELAY(1);
206
207 /* check termination */
208 if (!(ppb_rstr(bus) & SELECT) || !spin) {
209 error = ENODEV;
210 goto error;
211 }
212
213 /* Event 4 - read ext. value */
214 r = ppb_rdtr(bus);
215
216 /* nibble mode is not supported */
217 if ((r == (char)request_mode) ||
218 (r == NIBBLE_1284_NORMAL)) {
219
220 /* Event 5 - restore direction bit, no data avail */
221 ppb_wctr(bus, (STROBE | nINIT) & ~(SELECTIN));
222 DELAY(1);
223
224 /* Event 6 */
225 ppb_wctr(bus, (nINIT) & ~(SELECTIN | STROBE));
226
227 if (r == NIBBLE_1284_NORMAL) {
228#ifdef DEBUG_1284
229 printf("R");
230#endif
231 ppb_1284_set_error(bus, PPB_MODE_UNSUPPORTED, 4);
232 error = EINVAL;
233 goto error;
234 } else {
235 ppb_1284_set_state(bus, PPB_PERIPHERAL_IDLE);
236 switch (r) {
237 case BYTE_1284_NORMAL:
238 ppb_set_mode(bus, PPB_BYTE);
239 break;
240 default:
241 break;
242 }
243#ifdef DEBUG_1284
244 printf("A");
245#endif
246 /* negociation succeeds */
247 }
248 } else {
249 /* Event 5 - mode not supported */
250 ppb_wctr(bus, SELECTIN);
251 DELAY(1);
252
253 /* Event 6 */
254 ppb_wctr(bus, (SELECTIN) & ~(STROBE | nINIT));
255 ppb_1284_set_error(bus, PPB_MODE_UNSUPPORTED, 4);
256
257#ifdef DEBUG_1284
258 printf("r");
259#endif
260 error = EINVAL;
261 goto error;
262 }
263
264 return (0);
265
266error:
267 ppb_peripheral_terminate(bus, PPB_WAIT);
268 return (error);
269}
270
271/*
272 * ppb_peripheral_terminate()
273 *
274 * Terminate peripheral transfer side
275 *
276 * Always return 0 in compatible mode
277 */
278int
279ppb_peripheral_terminate(device_t bus, int how)
280{
281 int error = 0;
282
283#ifdef DEBUG_1284
284 printf("t");
285#endif
286
287 ppb_1284_set_state(bus, PPB_PERIPHERAL_TERMINATION);
288
289 /* Event 22 - wait up to host response time (1s) */
290 if ((error = do_peripheral_wait(bus, SELECT | nBUSY, 0))) {
291 ppb_1284_set_error(bus, PPB_TIMEOUT, 22);
292 goto error;
293 }
294
295 /* Event 24 */
| 97}
98
99/*
100 * ppb_1284_set_state()
101 *
102 * Change IEEE1284 state if no error occured
103 */
104int
105ppb_1284_set_state(device_t bus, int state)
106{
107 struct ppb_data *ppb = DEVTOSOFTC(bus);
108
109 /* call ppb_1284_reset_error() if you absolutly want to change
110 * the state from PPB_ERROR to another */
111 if ((ppb->state != PPB_ERROR) &&
112 (ppb->error == PPB_NO_ERROR)) {
113 ppb->state = state;
114 ppb->error = PPB_NO_ERROR;
115 }
116
117 return (0);
118}
119
120static int
121ppb_1284_set_error(device_t bus, int error, int event)
122{
123 struct ppb_data *ppb = DEVTOSOFTC(bus);
124
125 /* do not accumulate errors */
126 if ((ppb->error == PPB_NO_ERROR) &&
127 (ppb->state != PPB_ERROR)) {
128 ppb->error = error;
129 ppb->state = PPB_ERROR;
130 }
131
132#ifdef DEBUG_1284
133 printf("ppb1284: error=%d status=0x%x event=%d\n", error,
134 ppb_rstr(bus) & 0xff, event);
135#endif
136
137 return (0);
138}
139
140/*
141 * ppb_request_mode()
142 *
143 * Converts mode+options into ext. value
144 */
145static int
146ppb_request_mode(int mode, int options)
147{
148 int request_mode = 0;
149
150 if (options & PPB_EXTENSIBILITY_LINK) {
151 request_mode = EXT_LINK_1284_NORMAL;
152
153 } else {
154 switch (mode) {
155 case PPB_NIBBLE:
156 request_mode = (options & PPB_REQUEST_ID) ?
157 NIBBLE_1284_REQUEST_ID :
158 NIBBLE_1284_NORMAL;
159 break;
160 case PPB_PS2:
161 request_mode = (options & PPB_REQUEST_ID) ?
162 BYTE_1284_REQUEST_ID :
163 BYTE_1284_NORMAL;
164 break;
165 case PPB_ECP:
166 if (options & PPB_USE_RLE)
167 request_mode = (options & PPB_REQUEST_ID) ?
168 ECP_1284_RLE_REQUEST_ID :
169 ECP_1284_RLE;
170 else
171 request_mode = (options & PPB_REQUEST_ID) ?
172 ECP_1284_REQUEST_ID :
173 ECP_1284_NORMAL;
174 break;
175 case PPB_EPP:
176 request_mode = EPP_1284_NORMAL;
177 break;
178 default:
179 panic("%s: unsupported mode %d\n", __func__, mode);
180 }
181 }
182
183 return (request_mode);
184}
185
186/*
187 * ppb_peripheral_negociate()
188 *
189 * Negociate the peripheral side
190 */
191int
192ppb_peripheral_negociate(device_t bus, int mode, int options)
193{
194 int spin, request_mode, error = 0;
195 char r;
196
197 ppb_set_mode(bus, PPB_COMPATIBLE);
198 ppb_1284_set_state(bus, PPB_PERIPHERAL_NEGOCIATION);
199
200 /* compute ext. value */
201 request_mode = ppb_request_mode(mode, options);
202
203 /* wait host */
204 spin = 10;
205 while (spin-- && (ppb_rstr(bus) & nBUSY))
206 DELAY(1);
207
208 /* check termination */
209 if (!(ppb_rstr(bus) & SELECT) || !spin) {
210 error = ENODEV;
211 goto error;
212 }
213
214 /* Event 4 - read ext. value */
215 r = ppb_rdtr(bus);
216
217 /* nibble mode is not supported */
218 if ((r == (char)request_mode) ||
219 (r == NIBBLE_1284_NORMAL)) {
220
221 /* Event 5 - restore direction bit, no data avail */
222 ppb_wctr(bus, (STROBE | nINIT) & ~(SELECTIN));
223 DELAY(1);
224
225 /* Event 6 */
226 ppb_wctr(bus, (nINIT) & ~(SELECTIN | STROBE));
227
228 if (r == NIBBLE_1284_NORMAL) {
229#ifdef DEBUG_1284
230 printf("R");
231#endif
232 ppb_1284_set_error(bus, PPB_MODE_UNSUPPORTED, 4);
233 error = EINVAL;
234 goto error;
235 } else {
236 ppb_1284_set_state(bus, PPB_PERIPHERAL_IDLE);
237 switch (r) {
238 case BYTE_1284_NORMAL:
239 ppb_set_mode(bus, PPB_BYTE);
240 break;
241 default:
242 break;
243 }
244#ifdef DEBUG_1284
245 printf("A");
246#endif
247 /* negociation succeeds */
248 }
249 } else {
250 /* Event 5 - mode not supported */
251 ppb_wctr(bus, SELECTIN);
252 DELAY(1);
253
254 /* Event 6 */
255 ppb_wctr(bus, (SELECTIN) & ~(STROBE | nINIT));
256 ppb_1284_set_error(bus, PPB_MODE_UNSUPPORTED, 4);
257
258#ifdef DEBUG_1284
259 printf("r");
260#endif
261 error = EINVAL;
262 goto error;
263 }
264
265 return (0);
266
267error:
268 ppb_peripheral_terminate(bus, PPB_WAIT);
269 return (error);
270}
271
272/*
273 * ppb_peripheral_terminate()
274 *
275 * Terminate peripheral transfer side
276 *
277 * Always return 0 in compatible mode
278 */
279int
280ppb_peripheral_terminate(device_t bus, int how)
281{
282 int error = 0;
283
284#ifdef DEBUG_1284
285 printf("t");
286#endif
287
288 ppb_1284_set_state(bus, PPB_PERIPHERAL_TERMINATION);
289
290 /* Event 22 - wait up to host response time (1s) */
291 if ((error = do_peripheral_wait(bus, SELECT | nBUSY, 0))) {
292 ppb_1284_set_error(bus, PPB_TIMEOUT, 22);
293 goto error;
294 }
295
296 /* Event 24 */
|
296 ppb_wctr(bus, (nINIT | STROBE) & ~(AUTOFEED | SELECTIN));
| 297 ppb_wctr(bus, (nINIT | STROBE) & ~(AUTOFEED | SELECTIN));
|
297
298 /* Event 25 - wait up to host response time (1s) */
299 if ((error = do_peripheral_wait(bus, nBUSY, nBUSY))) {
300 ppb_1284_set_error(bus, PPB_TIMEOUT, 25);
301 goto error;
302 }
303
304 /* Event 26 */
| 298
299 /* Event 25 - wait up to host response time (1s) */
300 if ((error = do_peripheral_wait(bus, nBUSY, nBUSY))) {
301 ppb_1284_set_error(bus, PPB_TIMEOUT, 25);
302 goto error;
303 }
304
305 /* Event 26 */
|
305 ppb_wctr(bus, (SELECTIN | nINIT | STROBE) & ~(AUTOFEED));
| 306 ppb_wctr(bus, (SELECTIN | nINIT | STROBE) & ~(AUTOFEED));
|
306 DELAY(1);
307 /* Event 27 */
| 307 DELAY(1);
308 /* Event 27 */
|
308 ppb_wctr(bus, (SELECTIN | nINIT) & ~(STROBE | AUTOFEED));
| 309 ppb_wctr(bus, (SELECTIN | nINIT) & ~(STROBE | AUTOFEED));
|
309
310 /* Event 28 - wait up to host response time (1s) */
311 if ((error = do_peripheral_wait(bus, nBUSY, 0))) {
312 ppb_1284_set_error(bus, PPB_TIMEOUT, 28);
313 goto error;
314 }
| 310
311 /* Event 28 - wait up to host response time (1s) */
312 if ((error = do_peripheral_wait(bus, nBUSY, 0))) {
313 ppb_1284_set_error(bus, PPB_TIMEOUT, 28);
314 goto error;
315 }
|
315
| 316
|
316error:
317 ppb_set_mode(bus, PPB_COMPATIBLE);
318 ppb_1284_set_state(bus, PPB_FORWARD_IDLE);
319
320 return (0);
321}
322
323/*
324 * byte_peripheral_outbyte()
325 *
326 * Write 1 byte in BYTE mode
327 */
328static int
329byte_peripheral_outbyte(device_t bus, char *buffer, int last)
330{
331 int error = 0;
332
333 /* Event 7 */
334 if ((error = do_1284_wait(bus, nBUSY, nBUSY))) {
335 ppb_1284_set_error(bus, PPB_TIMEOUT, 7);
336 goto error;
337 }
338
339 /* check termination */
340 if (!(ppb_rstr(bus) & SELECT)) {
341 ppb_peripheral_terminate(bus, PPB_WAIT);
342 goto error;
343 }
344
345 /* Event 15 - put byte on data lines */
346#ifdef DEBUG_1284
347 printf("B");
348#endif
349 ppb_wdtr(bus, *buffer);
350
351 /* Event 9 */
352 ppb_wctr(bus, (AUTOFEED | STROBE) & ~(nINIT | SELECTIN));
353
354 /* Event 10 - wait data read */
355 if ((error = do_peripheral_wait(bus, nBUSY, 0))) {
356 ppb_1284_set_error(bus, PPB_TIMEOUT, 16);
357 goto error;
358 }
359
360 /* Event 11 */
361 if (!last) {
362 ppb_wctr(bus, (AUTOFEED) & ~(nINIT | STROBE | SELECTIN));
363 } else {
364 ppb_wctr(bus, (nINIT) & ~(STROBE | SELECTIN | AUTOFEED));
365 }
366
367#if 0
368 /* Event 16 - wait strobe */
369 if ((error = do_peripheral_wait(bus, nACK | nBUSY, 0))) {
370 ppb_1284_set_error(bus, PPB_TIMEOUT, 16);
371 goto error;
372 }
373#endif
374
375 /* check termination */
376 if (!(ppb_rstr(bus) & SELECT)) {
377 ppb_peripheral_terminate(bus, PPB_WAIT);
378 goto error;
379 }
380
381error:
382 return (error);
383}
384
385/*
386 * byte_peripheral_write()
387 *
388 * Write n bytes in BYTE mode
389 */
390int
391byte_peripheral_write(device_t bus, char *buffer, int len, int *sent)
392{
393 int error = 0, i;
394 char r;
395
396 ppb_1284_set_state(bus, PPB_PERIPHERAL_TRANSFER);
397
398 /* wait forever, the remote host is master and should initiate
399 * termination
400 */
401 for (i=0; i<len; i++) {
402 /* force remote nFAULT low to release the remote waiting
403 * process, if any
404 */
405 r = ppb_rctr(bus);
406 ppb_wctr(bus, r & ~nINIT);
407
408#ifdef DEBUG_1284
409 printf("y");
410#endif
411 /* Event 7 */
412 error = ppb_poll_bus(bus, PPB_FOREVER, nBUSY, nBUSY,
413 PPB_INTR);
414
415 if (error && error != EWOULDBLOCK)
416 goto error;
417
418#ifdef DEBUG_1284
419 printf("b");
420#endif
421 if ((error = byte_peripheral_outbyte(bus, buffer+i, (i == len-1))))
422 goto error;
423 }
424error:
425 if (!error)
426 ppb_1284_set_state(bus, PPB_PERIPHERAL_IDLE);
427
428 *sent = i;
429 return (error);
430}
431
432/*
433 * byte_1284_inbyte()
434 *
435 * Read 1 byte in BYTE mode
436 */
437int
438byte_1284_inbyte(device_t bus, char *buffer)
439{
440 int error = 0;
441
442 /* Event 7 - ready to take data (nAUTO low) */
443 ppb_wctr(bus, (PCD | nINIT | AUTOFEED) & ~(STROBE | SELECTIN));
444
445 /* Event 9 - peripheral set nAck low */
446 if ((error = do_1284_wait(bus, nACK, 0))) {
447 ppb_1284_set_error(bus, PPB_TIMEOUT, 9);
448 goto error;
449 }
450
451 /* read the byte */
452 *buffer = ppb_rdtr(bus);
453
454 /* Event 10 - data received, can't accept more */
455 ppb_wctr(bus, (nINIT) & ~(AUTOFEED | STROBE | SELECTIN));
456
457 /* Event 11 - peripheral ack */
458 if ((error = do_1284_wait(bus, nACK, nACK))) {
459 ppb_1284_set_error(bus, PPB_TIMEOUT, 11);
460 goto error;
461 }
462
463 /* Event 16 - strobe */
464 ppb_wctr(bus, (nINIT | STROBE) & ~(AUTOFEED | SELECTIN));
465 DELAY(3);
466 ppb_wctr(bus, (nINIT) & ~(AUTOFEED | STROBE | SELECTIN));
467
468error:
469 return (error);
470}
471
472/*
473 * nibble_1284_inbyte()
474 *
475 * Read 1 byte in NIBBLE mode
476 */
477int
478nibble_1284_inbyte(device_t bus, char *buffer)
479{
480 char nibble[2];
481 int i, error;
482
483 for (i = 0; i < 2; i++) {
484
485 /* Event 7 - ready to take data (nAUTO low) */
486 ppb_wctr(bus, (nINIT | AUTOFEED) & ~(STROBE | SELECTIN));
487
488 /* Event 8 - peripheral writes the first nibble */
489
490 /* Event 9 - peripheral set nAck low */
491 if ((error = do_1284_wait(bus, nACK, 0))) {
492 ppb_1284_set_error(bus, PPB_TIMEOUT, 9);
493 goto error;
494 }
495
496 /* read nibble */
497 nibble[i] = ppb_rstr(bus);
498
499 /* Event 10 - ack, nibble received */
500 ppb_wctr(bus, nINIT & ~(AUTOFEED | STROBE | SELECTIN));
501
502 /* Event 11 - wait ack from peripherial */
503 if ((error = do_1284_wait(bus, nACK, nACK))) {
504 ppb_1284_set_error(bus, PPB_TIMEOUT, 11);
505 goto error;
506 }
507 }
508
509 *buffer = ((nibble2char(nibble[1]) << 4) & 0xf0) |
510 (nibble2char(nibble[0]) & 0x0f);
511
512error:
513 return (error);
514}
515
516/*
517 * spp_1284_read()
518 *
519 * Read in IEEE1284 NIBBLE/BYTE mode
520 */
521int
522spp_1284_read(device_t bus, int mode, char *buffer, int max, int *read)
523{
524 int error = 0, len = 0;
525 int terminate_after_transfer = 1;
526 int state;
527
528 *read = len = 0;
529
530 state = ppb_1284_get_state(bus);
531
532 switch (state) {
533 case PPB_FORWARD_IDLE:
534 if ((error = ppb_1284_negociate(bus, mode, 0)))
535 return (error);
536 break;
537
538 case PPB_REVERSE_IDLE:
539 terminate_after_transfer = 0;
540 break;
| 317error:
318 ppb_set_mode(bus, PPB_COMPATIBLE);
319 ppb_1284_set_state(bus, PPB_FORWARD_IDLE);
320
321 return (0);
322}
323
324/*
325 * byte_peripheral_outbyte()
326 *
327 * Write 1 byte in BYTE mode
328 */
329static int
330byte_peripheral_outbyte(device_t bus, char *buffer, int last)
331{
332 int error = 0;
333
334 /* Event 7 */
335 if ((error = do_1284_wait(bus, nBUSY, nBUSY))) {
336 ppb_1284_set_error(bus, PPB_TIMEOUT, 7);
337 goto error;
338 }
339
340 /* check termination */
341 if (!(ppb_rstr(bus) & SELECT)) {
342 ppb_peripheral_terminate(bus, PPB_WAIT);
343 goto error;
344 }
345
346 /* Event 15 - put byte on data lines */
347#ifdef DEBUG_1284
348 printf("B");
349#endif
350 ppb_wdtr(bus, *buffer);
351
352 /* Event 9 */
353 ppb_wctr(bus, (AUTOFEED | STROBE) & ~(nINIT | SELECTIN));
354
355 /* Event 10 - wait data read */
356 if ((error = do_peripheral_wait(bus, nBUSY, 0))) {
357 ppb_1284_set_error(bus, PPB_TIMEOUT, 16);
358 goto error;
359 }
360
361 /* Event 11 */
362 if (!last) {
363 ppb_wctr(bus, (AUTOFEED) & ~(nINIT | STROBE | SELECTIN));
364 } else {
365 ppb_wctr(bus, (nINIT) & ~(STROBE | SELECTIN | AUTOFEED));
366 }
367
368#if 0
369 /* Event 16 - wait strobe */
370 if ((error = do_peripheral_wait(bus, nACK | nBUSY, 0))) {
371 ppb_1284_set_error(bus, PPB_TIMEOUT, 16);
372 goto error;
373 }
374#endif
375
376 /* check termination */
377 if (!(ppb_rstr(bus) & SELECT)) {
378 ppb_peripheral_terminate(bus, PPB_WAIT);
379 goto error;
380 }
381
382error:
383 return (error);
384}
385
386/*
387 * byte_peripheral_write()
388 *
389 * Write n bytes in BYTE mode
390 */
391int
392byte_peripheral_write(device_t bus, char *buffer, int len, int *sent)
393{
394 int error = 0, i;
395 char r;
396
397 ppb_1284_set_state(bus, PPB_PERIPHERAL_TRANSFER);
398
399 /* wait forever, the remote host is master and should initiate
400 * termination
401 */
402 for (i=0; i<len; i++) {
403 /* force remote nFAULT low to release the remote waiting
404 * process, if any
405 */
406 r = ppb_rctr(bus);
407 ppb_wctr(bus, r & ~nINIT);
408
409#ifdef DEBUG_1284
410 printf("y");
411#endif
412 /* Event 7 */
413 error = ppb_poll_bus(bus, PPB_FOREVER, nBUSY, nBUSY,
414 PPB_INTR);
415
416 if (error && error != EWOULDBLOCK)
417 goto error;
418
419#ifdef DEBUG_1284
420 printf("b");
421#endif
422 if ((error = byte_peripheral_outbyte(bus, buffer+i, (i == len-1))))
423 goto error;
424 }
425error:
426 if (!error)
427 ppb_1284_set_state(bus, PPB_PERIPHERAL_IDLE);
428
429 *sent = i;
430 return (error);
431}
432
433/*
434 * byte_1284_inbyte()
435 *
436 * Read 1 byte in BYTE mode
437 */
438int
439byte_1284_inbyte(device_t bus, char *buffer)
440{
441 int error = 0;
442
443 /* Event 7 - ready to take data (nAUTO low) */
444 ppb_wctr(bus, (PCD | nINIT | AUTOFEED) & ~(STROBE | SELECTIN));
445
446 /* Event 9 - peripheral set nAck low */
447 if ((error = do_1284_wait(bus, nACK, 0))) {
448 ppb_1284_set_error(bus, PPB_TIMEOUT, 9);
449 goto error;
450 }
451
452 /* read the byte */
453 *buffer = ppb_rdtr(bus);
454
455 /* Event 10 - data received, can't accept more */
456 ppb_wctr(bus, (nINIT) & ~(AUTOFEED | STROBE | SELECTIN));
457
458 /* Event 11 - peripheral ack */
459 if ((error = do_1284_wait(bus, nACK, nACK))) {
460 ppb_1284_set_error(bus, PPB_TIMEOUT, 11);
461 goto error;
462 }
463
464 /* Event 16 - strobe */
465 ppb_wctr(bus, (nINIT | STROBE) & ~(AUTOFEED | SELECTIN));
466 DELAY(3);
467 ppb_wctr(bus, (nINIT) & ~(AUTOFEED | STROBE | SELECTIN));
468
469error:
470 return (error);
471}
472
473/*
474 * nibble_1284_inbyte()
475 *
476 * Read 1 byte in NIBBLE mode
477 */
478int
479nibble_1284_inbyte(device_t bus, char *buffer)
480{
481 char nibble[2];
482 int i, error;
483
484 for (i = 0; i < 2; i++) {
485
486 /* Event 7 - ready to take data (nAUTO low) */
487 ppb_wctr(bus, (nINIT | AUTOFEED) & ~(STROBE | SELECTIN));
488
489 /* Event 8 - peripheral writes the first nibble */
490
491 /* Event 9 - peripheral set nAck low */
492 if ((error = do_1284_wait(bus, nACK, 0))) {
493 ppb_1284_set_error(bus, PPB_TIMEOUT, 9);
494 goto error;
495 }
496
497 /* read nibble */
498 nibble[i] = ppb_rstr(bus);
499
500 /* Event 10 - ack, nibble received */
501 ppb_wctr(bus, nINIT & ~(AUTOFEED | STROBE | SELECTIN));
502
503 /* Event 11 - wait ack from peripherial */
504 if ((error = do_1284_wait(bus, nACK, nACK))) {
505 ppb_1284_set_error(bus, PPB_TIMEOUT, 11);
506 goto error;
507 }
508 }
509
510 *buffer = ((nibble2char(nibble[1]) << 4) & 0xf0) |
511 (nibble2char(nibble[0]) & 0x0f);
512
513error:
514 return (error);
515}
516
517/*
518 * spp_1284_read()
519 *
520 * Read in IEEE1284 NIBBLE/BYTE mode
521 */
522int
523spp_1284_read(device_t bus, int mode, char *buffer, int max, int *read)
524{
525 int error = 0, len = 0;
526 int terminate_after_transfer = 1;
527 int state;
528
529 *read = len = 0;
530
531 state = ppb_1284_get_state(bus);
532
533 switch (state) {
534 case PPB_FORWARD_IDLE:
535 if ((error = ppb_1284_negociate(bus, mode, 0)))
536 return (error);
537 break;
538
539 case PPB_REVERSE_IDLE:
540 terminate_after_transfer = 0;
541 break;
|
541
| 542
|
542 default:
543 ppb_1284_terminate(bus);
544 if ((error = ppb_1284_negociate(bus, mode, 0)))
545 return (error);
546 break;
547 }
548
549 while ((len < max) && !(ppb_rstr(bus) & (nFAULT))) {
550
551 ppb_1284_set_state(bus, PPB_REVERSE_TRANSFER);
552
553#ifdef DEBUG_1284
554 printf("B");
555#endif
556
557 switch (mode) {
558 case PPB_NIBBLE:
559 /* read a byte, error means no more data */
560 if (nibble_1284_inbyte(bus, buffer+len))
561 goto end_while;
562 break;
563 case PPB_BYTE:
564 if (byte_1284_inbyte(bus, buffer+len))
565 goto end_while;
566 break;
567 default:
568 error = EINVAL;
569 goto end_while;
570 }
571 len ++;
572 }
573end_while:
574
575 if (!error)
576 ppb_1284_set_state(bus, PPB_REVERSE_IDLE);
577
578 *read = len;
579
580 if (terminate_after_transfer || error)
581 ppb_1284_terminate(bus);
582
583 return (error);
584}
585
586/*
587 * ppb_1284_read_id()
588 *
589 */
590int
591ppb_1284_read_id(device_t bus, int mode, char *buffer,
592 int max, int *read)
593{
594 int error = 0;
595
596 /* fill the buffer with 0s */
597 bzero(buffer, max);
598
599 switch (mode) {
600 case PPB_NIBBLE:
601 case PPB_ECP:
602 if ((error = ppb_1284_negociate(bus, PPB_NIBBLE, PPB_REQUEST_ID)))
603 return (error);
604 error = spp_1284_read(bus, PPB_NIBBLE, buffer, max, read);
605 break;
606 case PPB_BYTE:
607 if ((error = ppb_1284_negociate(bus, PPB_BYTE, PPB_REQUEST_ID)))
608 return (error);
609 error = spp_1284_read(bus, PPB_BYTE, buffer, max, read);
610 break;
611 default:
612 panic("%s: unsupported mode %d\n", __func__, mode);
613 }
614
615 ppb_1284_terminate(bus);
616 return (error);
617}
618
619/*
620 * ppb_1284_read()
621 *
622 * IEEE1284 read
623 */
624int
625ppb_1284_read(device_t bus, int mode, char *buffer,
626 int max, int *read)
627{
628 int error = 0;
629
630 switch (mode) {
631 case PPB_NIBBLE:
632 case PPB_BYTE:
633 error = spp_1284_read(bus, mode, buffer, max, read);
634 break;
635 default:
636 return (EINVAL);
637 }
638
639 return (error);
640}
641
642/*
643 * ppb_1284_negociate()
644 *
645 * IEEE1284 negociation phase
646 *
647 * Normal nibble mode or request device id mode (see ppb_1284.h)
648 *
649 * After negociation, nFAULT is low if data is available
650 */
651int
652ppb_1284_negociate(device_t bus, int mode, int options)
653{
654 int error;
655 int request_mode;
656
657#ifdef DEBUG_1284
658 printf("n");
659#endif
660
661 if (ppb_1284_get_state(bus) >= PPB_PERIPHERAL_NEGOCIATION)
662 ppb_peripheral_terminate(bus, PPB_WAIT);
663
664 if (ppb_1284_get_state(bus) != PPB_FORWARD_IDLE)
665 ppb_1284_terminate(bus);
666
667#ifdef DEBUG_1284
668 printf("%d", mode);
669#endif
670
671 /* ensure the host is in compatible mode */
672 ppb_set_mode(bus, PPB_COMPATIBLE);
673
674 /* reset error to catch the actual negociation error */
675 ppb_1284_reset_error(bus, PPB_FORWARD_IDLE);
676
677 /* calculate ext. value */
678 request_mode = ppb_request_mode(mode, options);
679
680 /* default state */
681 ppb_wctr(bus, (nINIT | SELECTIN) & ~(STROBE | AUTOFEED));
682 DELAY(1);
683
684 /* enter negociation phase */
685 ppb_1284_set_state(bus, PPB_NEGOCIATION);
686
687 /* Event 0 - put the exten. value on the data lines */
688 ppb_wdtr(bus, request_mode);
689
690#ifdef PERIPH_1284
691 /* request remote host attention */
| 543 default:
544 ppb_1284_terminate(bus);
545 if ((error = ppb_1284_negociate(bus, mode, 0)))
546 return (error);
547 break;
548 }
549
550 while ((len < max) && !(ppb_rstr(bus) & (nFAULT))) {
551
552 ppb_1284_set_state(bus, PPB_REVERSE_TRANSFER);
553
554#ifdef DEBUG_1284
555 printf("B");
556#endif
557
558 switch (mode) {
559 case PPB_NIBBLE:
560 /* read a byte, error means no more data */
561 if (nibble_1284_inbyte(bus, buffer+len))
562 goto end_while;
563 break;
564 case PPB_BYTE:
565 if (byte_1284_inbyte(bus, buffer+len))
566 goto end_while;
567 break;
568 default:
569 error = EINVAL;
570 goto end_while;
571 }
572 len ++;
573 }
574end_while:
575
576 if (!error)
577 ppb_1284_set_state(bus, PPB_REVERSE_IDLE);
578
579 *read = len;
580
581 if (terminate_after_transfer || error)
582 ppb_1284_terminate(bus);
583
584 return (error);
585}
586
587/*
588 * ppb_1284_read_id()
589 *
590 */
591int
592ppb_1284_read_id(device_t bus, int mode, char *buffer,
593 int max, int *read)
594{
595 int error = 0;
596
597 /* fill the buffer with 0s */
598 bzero(buffer, max);
599
600 switch (mode) {
601 case PPB_NIBBLE:
602 case PPB_ECP:
603 if ((error = ppb_1284_negociate(bus, PPB_NIBBLE, PPB_REQUEST_ID)))
604 return (error);
605 error = spp_1284_read(bus, PPB_NIBBLE, buffer, max, read);
606 break;
607 case PPB_BYTE:
608 if ((error = ppb_1284_negociate(bus, PPB_BYTE, PPB_REQUEST_ID)))
609 return (error);
610 error = spp_1284_read(bus, PPB_BYTE, buffer, max, read);
611 break;
612 default:
613 panic("%s: unsupported mode %d\n", __func__, mode);
614 }
615
616 ppb_1284_terminate(bus);
617 return (error);
618}
619
620/*
621 * ppb_1284_read()
622 *
623 * IEEE1284 read
624 */
625int
626ppb_1284_read(device_t bus, int mode, char *buffer,
627 int max, int *read)
628{
629 int error = 0;
630
631 switch (mode) {
632 case PPB_NIBBLE:
633 case PPB_BYTE:
634 error = spp_1284_read(bus, mode, buffer, max, read);
635 break;
636 default:
637 return (EINVAL);
638 }
639
640 return (error);
641}
642
643/*
644 * ppb_1284_negociate()
645 *
646 * IEEE1284 negociation phase
647 *
648 * Normal nibble mode or request device id mode (see ppb_1284.h)
649 *
650 * After negociation, nFAULT is low if data is available
651 */
652int
653ppb_1284_negociate(device_t bus, int mode, int options)
654{
655 int error;
656 int request_mode;
657
658#ifdef DEBUG_1284
659 printf("n");
660#endif
661
662 if (ppb_1284_get_state(bus) >= PPB_PERIPHERAL_NEGOCIATION)
663 ppb_peripheral_terminate(bus, PPB_WAIT);
664
665 if (ppb_1284_get_state(bus) != PPB_FORWARD_IDLE)
666 ppb_1284_terminate(bus);
667
668#ifdef DEBUG_1284
669 printf("%d", mode);
670#endif
671
672 /* ensure the host is in compatible mode */
673 ppb_set_mode(bus, PPB_COMPATIBLE);
674
675 /* reset error to catch the actual negociation error */
676 ppb_1284_reset_error(bus, PPB_FORWARD_IDLE);
677
678 /* calculate ext. value */
679 request_mode = ppb_request_mode(mode, options);
680
681 /* default state */
682 ppb_wctr(bus, (nINIT | SELECTIN) & ~(STROBE | AUTOFEED));
683 DELAY(1);
684
685 /* enter negociation phase */
686 ppb_1284_set_state(bus, PPB_NEGOCIATION);
687
688 /* Event 0 - put the exten. value on the data lines */
689 ppb_wdtr(bus, request_mode);
690
691#ifdef PERIPH_1284
692 /* request remote host attention */
|
692 ppb_wctr(bus, (nINIT | STROBE) & ~(AUTOFEED | SELECTIN));
693 DELAY(1);
694 ppb_wctr(bus, (nINIT) & ~(STROBE | AUTOFEED | SELECTIN));
| 693 ppb_wctr(bus, (nINIT | STROBE) & ~(AUTOFEED | SELECTIN));
694 DELAY(1);
695 ppb_wctr(bus, (nINIT) & ~(STROBE | AUTOFEED | SELECTIN));
|
695#else
696 DELAY(1);
697
698#endif /* !PERIPH_1284 */
699
700 /* Event 1 - enter IEEE1284 mode */
701 ppb_wctr(bus, (nINIT | AUTOFEED) & ~(STROBE | SELECTIN));
702
703#ifdef PERIPH_1284
| 696#else
697 DELAY(1);
698
699#endif /* !PERIPH_1284 */
700
701 /* Event 1 - enter IEEE1284 mode */
702 ppb_wctr(bus, (nINIT | AUTOFEED) & ~(STROBE | SELECTIN));
703
704#ifdef PERIPH_1284
|
704 /* ignore the PError line, wait a bit more, remote host's
| 705 /* ignore the PError line, wait a bit more, remote host's
|
705 * interrupts don't respond fast enough */
706 if (ppb_poll_bus(bus, 40, nACK | SELECT | nFAULT,
707 SELECT | nFAULT, PPB_NOINTR | PPB_POLL)) {
| 706 * interrupts don't respond fast enough */
707 if (ppb_poll_bus(bus, 40, nACK | SELECT | nFAULT,
708 SELECT | nFAULT, PPB_NOINTR | PPB_POLL)) {
|
708 ppb_1284_set_error(bus, PPB_NOT_IEEE1284, 2);
709 error = ENODEV;
710 goto error;
711 }
| 709 ppb_1284_set_error(bus, PPB_NOT_IEEE1284, 2);
710 error = ENODEV;
711 goto error;
712 }
|
712#else
713 /* Event 2 - trying IEEE1284 dialog */
714 if (do_1284_wait(bus, nACK | PERROR | SELECT | nFAULT,
715 PERROR | SELECT | nFAULT)) {
716 ppb_1284_set_error(bus, PPB_NOT_IEEE1284, 2);
717 error = ENODEV;
718 goto error;
719 }
720#endif /* !PERIPH_1284 */
721
722 /* Event 3 - latch the ext. value to the peripheral */
723 ppb_wctr(bus, (nINIT | STROBE | AUTOFEED) & ~SELECTIN);
724 DELAY(1);
725
726 /* Event 4 - IEEE1284 device recognized */
727 ppb_wctr(bus, nINIT & ~(SELECTIN | AUTOFEED | STROBE));
728
729 /* Event 6 - waiting for status lines */
730 if (do_1284_wait(bus, nACK, nACK)) {
731 ppb_1284_set_error(bus, PPB_TIMEOUT, 6);
732 error = EBUSY;
733 goto error;
734 }
735
736 /* Event 7 - quering result consider nACK not to misunderstand
737 * a remote computer terminate sequence */
738 if (options & PPB_EXTENSIBILITY_LINK) {
739
740 /* XXX not fully supported yet */
741 ppb_1284_terminate(bus);
742 return (0);
743
744 }
745 if (request_mode == NIBBLE_1284_NORMAL) {
746 if (do_1284_wait(bus, nACK | SELECT, nACK)) {
747 ppb_1284_set_error(bus, PPB_MODE_UNSUPPORTED, 7);
748 error = ENODEV;
749 goto error;
750 }
751 } else {
752 if (do_1284_wait(bus, nACK | SELECT, SELECT | nACK)) {
753 ppb_1284_set_error(bus, PPB_MODE_UNSUPPORTED, 7);
754 error = ENODEV;
755 goto error;
756 }
757 }
758
759 switch (mode) {
760 case PPB_NIBBLE:
761 case PPB_PS2:
762 /* enter reverse idle phase */
763 ppb_1284_set_state(bus, PPB_REVERSE_IDLE);
764 break;
765 case PPB_ECP:
766 /* negociation ok, now setup the communication */
767 ppb_1284_set_state(bus, PPB_SETUP);
768 ppb_wctr(bus, (nINIT | AUTOFEED) & ~(SELECTIN | STROBE));
769
770#ifdef PERIPH_1284
771 /* ignore PError line */
772 if (do_1284_wait(bus, nACK | SELECT | nBUSY,
| 713#else
714 /* Event 2 - trying IEEE1284 dialog */
715 if (do_1284_wait(bus, nACK | PERROR | SELECT | nFAULT,
716 PERROR | SELECT | nFAULT)) {
717 ppb_1284_set_error(bus, PPB_NOT_IEEE1284, 2);
718 error = ENODEV;
719 goto error;
720 }
721#endif /* !PERIPH_1284 */
722
723 /* Event 3 - latch the ext. value to the peripheral */
724 ppb_wctr(bus, (nINIT | STROBE | AUTOFEED) & ~SELECTIN);
725 DELAY(1);
726
727 /* Event 4 - IEEE1284 device recognized */
728 ppb_wctr(bus, nINIT & ~(SELECTIN | AUTOFEED | STROBE));
729
730 /* Event 6 - waiting for status lines */
731 if (do_1284_wait(bus, nACK, nACK)) {
732 ppb_1284_set_error(bus, PPB_TIMEOUT, 6);
733 error = EBUSY;
734 goto error;
735 }
736
737 /* Event 7 - quering result consider nACK not to misunderstand
738 * a remote computer terminate sequence */
739 if (options & PPB_EXTENSIBILITY_LINK) {
740
741 /* XXX not fully supported yet */
742 ppb_1284_terminate(bus);
743 return (0);
744
745 }
746 if (request_mode == NIBBLE_1284_NORMAL) {
747 if (do_1284_wait(bus, nACK | SELECT, nACK)) {
748 ppb_1284_set_error(bus, PPB_MODE_UNSUPPORTED, 7);
749 error = ENODEV;
750 goto error;
751 }
752 } else {
753 if (do_1284_wait(bus, nACK | SELECT, SELECT | nACK)) {
754 ppb_1284_set_error(bus, PPB_MODE_UNSUPPORTED, 7);
755 error = ENODEV;
756 goto error;
757 }
758 }
759
760 switch (mode) {
761 case PPB_NIBBLE:
762 case PPB_PS2:
763 /* enter reverse idle phase */
764 ppb_1284_set_state(bus, PPB_REVERSE_IDLE);
765 break;
766 case PPB_ECP:
767 /* negociation ok, now setup the communication */
768 ppb_1284_set_state(bus, PPB_SETUP);
769 ppb_wctr(bus, (nINIT | AUTOFEED) & ~(SELECTIN | STROBE));
770
771#ifdef PERIPH_1284
772 /* ignore PError line */
773 if (do_1284_wait(bus, nACK | SELECT | nBUSY,
|
773 nACK | SELECT | nBUSY)) {
774 ppb_1284_set_error(bus, PPB_TIMEOUT, 30);
775 error = ENODEV;
776 goto error;
777 }
| 774 nACK | SELECT | nBUSY)) {
775 ppb_1284_set_error(bus, PPB_TIMEOUT, 30);
776 error = ENODEV;
777 goto error;
778 }
|
778#else
779 if (do_1284_wait(bus, nACK | SELECT | PERROR | nBUSY,
780 nACK | SELECT | PERROR | nBUSY)) {
781 ppb_1284_set_error(bus, PPB_TIMEOUT, 30);
782 error = ENODEV;
783 goto error;
784 }
785#endif /* !PERIPH_1284 */
786
787 /* ok, the host enters the ForwardIdle state */
788 ppb_1284_set_state(bus, PPB_ECP_FORWARD_IDLE);
789 break;
790 case PPB_EPP:
791 ppb_1284_set_state(bus, PPB_EPP_IDLE);
792 break;
793
794 default:
795 panic("%s: unknown mode (%d)!", __func__, mode);
796 }
797 ppb_set_mode(bus, mode);
798
799 return (0);
800
801error:
802 ppb_1284_terminate(bus);
803
804 return (error);
805}
806
807/*
808 * ppb_1284_terminate()
809 *
810 * IEEE1284 termination phase, return code should ignored since the host
811 * is _always_ in compatible mode after ppb_1284_terminate()
812 */
813int
814ppb_1284_terminate(device_t bus)
815{
816
817#ifdef DEBUG_1284
818 printf("T");
819#endif
820
821 /* do not reset error here to keep the error that
822 * may occured before the ppb_1284_terminate() call */
823 ppb_1284_set_state(bus, PPB_TERMINATION);
824
825#ifdef PERIPH_1284
826 /* request remote host attention */
| 779#else
780 if (do_1284_wait(bus, nACK | SELECT | PERROR | nBUSY,
781 nACK | SELECT | PERROR | nBUSY)) {
782 ppb_1284_set_error(bus, PPB_TIMEOUT, 30);
783 error = ENODEV;
784 goto error;
785 }
786#endif /* !PERIPH_1284 */
787
788 /* ok, the host enters the ForwardIdle state */
789 ppb_1284_set_state(bus, PPB_ECP_FORWARD_IDLE);
790 break;
791 case PPB_EPP:
792 ppb_1284_set_state(bus, PPB_EPP_IDLE);
793 break;
794
795 default:
796 panic("%s: unknown mode (%d)!", __func__, mode);
797 }
798 ppb_set_mode(bus, mode);
799
800 return (0);
801
802error:
803 ppb_1284_terminate(bus);
804
805 return (error);
806}
807
808/*
809 * ppb_1284_terminate()
810 *
811 * IEEE1284 termination phase, return code should ignored since the host
812 * is _always_ in compatible mode after ppb_1284_terminate()
813 */
814int
815ppb_1284_terminate(device_t bus)
816{
817
818#ifdef DEBUG_1284
819 printf("T");
820#endif
821
822 /* do not reset error here to keep the error that
823 * may occured before the ppb_1284_terminate() call */
824 ppb_1284_set_state(bus, PPB_TERMINATION);
825
826#ifdef PERIPH_1284
827 /* request remote host attention */
|
827 ppb_wctr(bus, (nINIT | STROBE | SELECTIN) & ~(AUTOFEED));
828 DELAY(1);
| 828 ppb_wctr(bus, (nINIT | STROBE | SELECTIN) & ~(AUTOFEED));
829 DELAY(1);
|
829#endif /* PERIPH_1284 */
830
831 /* Event 22 - set nSelectin low and nAutoFeed high */
832 ppb_wctr(bus, (nINIT | SELECTIN) & ~(STROBE | AUTOFEED));
833
834 /* Event 24 - waiting for peripheral, Xflag ignored */
835 if (do_1284_wait(bus, nACK | nBUSY | nFAULT, nFAULT)) {
836 ppb_1284_set_error(bus, PPB_TIMEOUT, 24);
837 goto error;
838 }
839
840 /* Event 25 - set nAutoFd low */
841 ppb_wctr(bus, (nINIT | SELECTIN | AUTOFEED) & ~STROBE);
842
843 /* Event 26 - compatible mode status is set */
844
845 /* Event 27 - peripheral set nAck high */
846 if (do_1284_wait(bus, nACK, nACK)) {
847 ppb_1284_set_error(bus, PPB_TIMEOUT, 27);
848 }
849
850 /* Event 28 - end termination, return to idle phase */
851 ppb_wctr(bus, (nINIT | SELECTIN) & ~(STROBE | AUTOFEED));
852
853error:
854 /* return to compatible mode */
855 ppb_set_mode(bus, PPB_COMPATIBLE);
856 ppb_1284_set_state(bus, PPB_FORWARD_IDLE);
857
858 return (0);
859}
| 830#endif /* PERIPH_1284 */
831
832 /* Event 22 - set nSelectin low and nAutoFeed high */
833 ppb_wctr(bus, (nINIT | SELECTIN) & ~(STROBE | AUTOFEED));
834
835 /* Event 24 - waiting for peripheral, Xflag ignored */
836 if (do_1284_wait(bus, nACK | nBUSY | nFAULT, nFAULT)) {
837 ppb_1284_set_error(bus, PPB_TIMEOUT, 24);
838 goto error;
839 }
840
841 /* Event 25 - set nAutoFd low */
842 ppb_wctr(bus, (nINIT | SELECTIN | AUTOFEED) & ~STROBE);
843
844 /* Event 26 - compatible mode status is set */
845
846 /* Event 27 - peripheral set nAck high */
847 if (do_1284_wait(bus, nACK, nACK)) {
848 ppb_1284_set_error(bus, PPB_TIMEOUT, 27);
849 }
850
851 /* Event 28 - end termination, return to idle phase */
852 ppb_wctr(bus, (nINIT | SELECTIN) & ~(STROBE | AUTOFEED));
853
854error:
855 /* return to compatible mode */
856 ppb_set_mode(bus, PPB_COMPATIBLE);
857 ppb_1284_set_state(bus, PPB_FORWARD_IDLE);
858
859 return (0);
860}
|