46
47
48/*
49 * Device methods
50 */
51
52static void
53ppbus_print_child(device_t bus, device_t dev)
54{
55 struct ppb_device *ppbdev;
56
57 bus_print_child_header(bus, dev);
58
59 ppbdev = (struct ppb_device *)device_get_ivars(dev);
60
61 if (ppbdev->flags != 0)
62 printf(" flags 0x%x", ppbdev->flags);
63
64 printf(" on %s%d\n", device_get_name(bus), device_get_unit(bus));
65
66 return;
67}
68
69static int
70ppbus_probe(device_t dev)
71{
72 device_set_desc(dev, "Parallel port bus");
73
74 return (0);
75}
76
77/*
78 * ppbus_add_child()
79 *
80 * Add a ppbus device, allocate/initialize the ivars
81 */
82static device_t
83ppbus_add_child(device_t dev, int order, const char *name, int unit)
84{
85 struct ppb_device *ppbdev;
86 device_t child;
87
88 /* allocate ivars for the new ppbus child */
89 ppbdev = malloc(sizeof(struct ppb_device), M_PPBUSDEV, M_NOWAIT);
90 if (!ppbdev)
91 return NULL;
92 bzero(ppbdev, sizeof *ppbdev);
93
94 /* initialize the ivars */
95 ppbdev->name = name;
96
97 /* add the device as a child to the ppbus bus with the allocated
98 * ivars */
99 child = device_add_child_ordered(dev, order, name, unit);
100 device_set_ivars(child, ppbdev);
101
102 return child;
103}
104
105static int
106ppbus_read_ivar(device_t bus, device_t dev, int index, uintptr_t* val)
107{
108 struct ppb_device *ppbdev = (struct ppb_device *)device_get_ivars(dev);
109
110 switch (index) {
111 case PPBUS_IVAR_MODE:
112 /* XXX yet device mode = ppbus mode = chipset mode */
113 *val = (u_long)ppb_get_mode(bus);
114 ppbdev->mode = (u_short)*val;
115 break;
116 case PPBUS_IVAR_AVM:
117 *val = (u_long)ppbdev->avm;
118 break;
119 case PPBUS_IVAR_IRQ:
120 BUS_READ_IVAR(device_get_parent(bus), bus, PPC_IVAR_IRQ, val);
121 break;
122 default:
123 return (ENOENT);
124 }
125
126 return (0);
127}
128
129static int
130ppbus_write_ivar(device_t bus, device_t dev, int index, u_long val)
131{
132 struct ppb_device *ppbdev = (struct ppb_device *)device_get_ivars(dev);
133
134 switch (index) {
135 case PPBUS_IVAR_MODE:
136 /* XXX yet device mode = ppbus mode = chipset mode */
137 ppb_set_mode(bus,val);
138 ppbdev->mode = ppb_get_mode(bus);
139 break;
140 default:
141 return (ENOENT);
142 }
143
144 return (0);
145 }
146
147#define PPB_PNP_PRINTER 0
148#define PPB_PNP_MODEM 1
149#define PPB_PNP_NET 2
150#define PPB_PNP_HDC 3
151#define PPB_PNP_PCMCIA 4
152#define PPB_PNP_MEDIA 5
153#define PPB_PNP_FDC 6
154#define PPB_PNP_PORTS 7
155#define PPB_PNP_SCANNER 8
156#define PPB_PNP_DIGICAM 9
157
158#ifndef DONTPROBE_1284
159
160static char *pnp_tokens[] = {
161 "PRINTER", "MODEM", "NET", "HDC", "PCMCIA", "MEDIA",
162 "FDC", "PORTS", "SCANNER", "DIGICAM", "", NULL };
163
164#if 0
165static char *pnp_classes[] = {
166 "printer", "modem", "network device",
167 "hard disk", "PCMCIA", "multimedia device",
168 "floppy disk", "ports", "scanner",
169 "digital camera", "unknown device", NULL };
170#endif
171
172/*
173 * search_token()
174 *
175 * Search the first occurence of a token within a string
176 *
177 * XXX should use strxxx() calls
178 */
179static char *
180search_token(char *str, int slen, char *token)
181{
182 char *p;
183 int tlen, i, j;
184
185#define UNKNOWN_LENGTH -1
186
187 if (slen == UNKNOWN_LENGTH)
188 /* get string's length */
189 for (slen = 0, p = str; *p != '\0'; p++)
190 slen ++;
191
192 /* get token's length */
193 for (tlen = 0, p = token; *p != '\0'; p++)
194 tlen ++;
195
196 if (tlen == 0)
197 return (str);
198
199 for (i = 0; i <= slen-tlen; i++) {
200 for (j = 0; j < tlen; j++)
201 if (str[i+j] != token[j])
202 break;
203 if (j == tlen)
204 return (&str[i]);
205 }
206
207 return (NULL);
208}
209
210/*
211 * ppb_pnp_detect()
212 *
213 * Returns the class id. of the peripherial, -1 otherwise
214 */
215static int
216ppb_pnp_detect(device_t bus)
217{
218 char *token, *class = 0;
219 int i, len, error;
220 int class_id = -1;
221 char str[PPB_PnP_STRING_SIZE+1];
222 int unit = device_get_unit(bus);
223
224 printf("Probing for PnP devices on ppbus%d:\n", unit);
225
226 if ((error = ppb_1284_read_id(bus, PPB_NIBBLE, str,
227 PPB_PnP_STRING_SIZE, &len)))
228 goto end_detect;
229
230#ifdef DEBUG_1284
231 printf("ppb: <PnP> %d characters: ", len);
232 for (i = 0; i < len; i++)
233 printf("%c(0x%x) ", str[i], str[i]);
234 printf("\n");
235#endif
236
237 /* replace ';' characters by '\0' */
238 for (i = 0; i < len; i++)
239 str[i] = (str[i] == ';') ? '\0' : str[i];
240
241 if ((token = search_token(str, len, "MFG")) != NULL ||
242 (token = search_token(str, len, "MANUFACTURER")) != NULL)
243 printf("ppbus%d: <%s", unit,
244 search_token(token, UNKNOWN_LENGTH, ":") + 1);
245 else
246 printf("ppbus%d: <unknown", unit);
247
248 if ((token = search_token(str, len, "MDL")) != NULL ||
249 (token = search_token(str, len, "MODEL")) != NULL)
250 printf(" %s",
251 search_token(token, UNKNOWN_LENGTH, ":") + 1);
252 else
253 printf(" unknown");
254
255 if ((token = search_token(str, len, "VER")) != NULL)
256 printf("/%s",
257 search_token(token, UNKNOWN_LENGTH, ":") + 1);
258
259 if ((token = search_token(str, len, "REV")) != NULL)
260 printf(".%s",
261 search_token(token, UNKNOWN_LENGTH, ":") + 1);
262
263 printf(">");
264
265 if ((token = search_token(str, len, "CLS")) != NULL) {
266 class = search_token(token, UNKNOWN_LENGTH, ":") + 1;
267 printf(" %s", class);
268 }
269
270 if ((token = search_token(str, len, "CMD")) != NULL ||
271 (token = search_token(str, len, "COMMAND")) != NULL)
272 printf(" %s",
273 search_token(token, UNKNOWN_LENGTH, ":") + 1);
274
275 printf("\n");
276
277 if (class)
278 /* identify class ident */
279 for (i = 0; pnp_tokens[i] != NULL; i++) {
280 if (search_token(class, len, pnp_tokens[i]) != NULL) {
281 class_id = i;
282 goto end_detect;
283 }
284 }
285
286 class_id = PPB_PnP_UNKNOWN;
287
288end_detect:
289 return (class_id);
290}
291
292/*
293 * ppb_scan_bus()
294 *
295 * Scan the ppbus for IEEE1284 compliant devices
296 */
297static int
298ppb_scan_bus(device_t bus)
299{
300 struct ppb_data * ppb = (struct ppb_data *)device_get_softc(bus);
301 int error = 0;
302 int unit = device_get_unit(bus);
303
304 /* try all IEEE1284 modes, for one device only
305 *
306 * XXX We should implement the IEEE1284.3 standard to detect
307 * daisy chained devices
308 */
309
310 error = ppb_1284_negociate(bus, PPB_NIBBLE, PPB_REQUEST_ID);
311
312 if ((ppb->state == PPB_ERROR) && (ppb->error == PPB_NOT_IEEE1284))
313 goto end_scan;
314
315 ppb_1284_terminate(bus);
316
317 printf("ppbus%d: IEEE1284 device found ", unit);
318
319 if (!(error = ppb_1284_negociate(bus, PPB_NIBBLE, 0))) {
320 printf("/NIBBLE");
321 ppb_1284_terminate(bus);
322 }
323
324 if (!(error = ppb_1284_negociate(bus, PPB_PS2, 0))) {
325 printf("/PS2");
326 ppb_1284_terminate(bus);
327 }
328
329 if (!(error = ppb_1284_negociate(bus, PPB_ECP, 0))) {
330 printf("/ECP");
331 ppb_1284_terminate(bus);
332 }
333
334 if (!(error = ppb_1284_negociate(bus, PPB_ECP, PPB_USE_RLE))) {
335 printf("/ECP_RLE");
336 ppb_1284_terminate(bus);
337 }
338
339 if (!(error = ppb_1284_negociate(bus, PPB_EPP, 0))) {
340 printf("/EPP");
341 ppb_1284_terminate(bus);
342 }
343
344 /* try more IEEE1284 modes */
345 if (bootverbose) {
346 if (!(error = ppb_1284_negociate(bus, PPB_NIBBLE,
347 PPB_REQUEST_ID))) {
348 printf("/NIBBLE_ID");
349 ppb_1284_terminate(bus);
350 }
351
352 if (!(error = ppb_1284_negociate(bus, PPB_PS2,
353 PPB_REQUEST_ID))) {
354 printf("/PS2_ID");
355 ppb_1284_terminate(bus);
356 }
357
358 if (!(error = ppb_1284_negociate(bus, PPB_ECP,
359 PPB_REQUEST_ID))) {
360 printf("/ECP_ID");
361 ppb_1284_terminate(bus);
362 }
363
364 if (!(error = ppb_1284_negociate(bus, PPB_ECP,
365 PPB_REQUEST_ID | PPB_USE_RLE))) {
366 printf("/ECP_RLE_ID");
367 ppb_1284_terminate(bus);
368 }
369
370 if (!(error = ppb_1284_negociate(bus, PPB_COMPATIBLE,
371 PPB_EXTENSIBILITY_LINK))) {
372 printf("/Extensibility Link");
373 ppb_1284_terminate(bus);
374 }
375 }
376
377 printf("\n");
378
379 /* detect PnP devices */
380 ppb->class_id = ppb_pnp_detect(bus);
381
382 return (0);
383
384end_scan:
385 return (error);
386}
387
388#endif /* !DONTPROBE_1284 */
389
390static int
391ppbus_attach(device_t dev)
392{
393
394 /* Locate our children */
395 bus_generic_probe(dev);
396
397#ifndef DONTPROBE_1284
398 /* detect IEEE1284 compliant devices */
399 ppb_scan_bus(dev);
400#endif /* !DONTPROBE_1284 */
401
402 /* launch attachement of the added children */
403 bus_generic_attach(dev);
404
405 return 0;
406}
407
408static int
409ppbus_setup_intr(device_t bus, device_t child, struct resource *r, int flags,
410 void (*ihand)(void *), void *arg, void **cookiep)
411{
412 int error;
413 struct ppb_data *ppb = DEVTOSOFTC(bus);
414 struct ppb_device *ppbdev = (struct ppb_device *)device_get_ivars(child);
415
416 /* a device driver must own the bus to register an interrupt */
417 if (ppb->ppb_owner != child)
418 return (EINVAL);
419
420 if ((error = BUS_SETUP_INTR(device_get_parent(bus), child, r, flags,
421 ihand, arg, cookiep)))
422 return (error);
423
424 /* store the resource and the cookie for eventually forcing
425 * handler unregistration
426 */
427 ppbdev->intr_cookie = *cookiep;
428 ppbdev->intr_resource = r;
429
430 return (0);
431}
432
433static int
434ppbus_teardown_intr(device_t bus, device_t child, struct resource *r, void *ih)
435{
436 struct ppb_data *ppb = DEVTOSOFTC(bus);
437 struct ppb_device *ppbdev = (struct ppb_device *)device_get_ivars(child);
438
439 /* a device driver must own the bus to unregister an interrupt */
440 if ((ppb->ppb_owner != child) || (ppbdev->intr_cookie != ih) ||
441 (ppbdev->intr_resource != r))
442 return (EINVAL);
443
444 ppbdev->intr_cookie = 0;
445 ppbdev->intr_resource = 0;
446
447 /* pass unregistration to the upper layer */
448 return (BUS_TEARDOWN_INTR(device_get_parent(bus), child, r, ih));
449}
450
451/*
452 * ppb_request_bus()
453 *
454 * Allocate the device to perform transfers.
455 *
456 * how : PPB_WAIT or PPB_DONTWAIT
457 */
458int
459ppb_request_bus(device_t bus, device_t dev, int how)
460{
461 int s, error = 0;
462 struct ppb_data *ppb = DEVTOSOFTC(bus);
463 struct ppb_device *ppbdev = (struct ppb_device *)device_get_ivars(dev);
464
465 while (!error) {
466 s = splhigh();
467 if (ppb->ppb_owner) {
468 splx(s);
469
470 switch (how) {
471 case (PPB_WAIT | PPB_INTR):
472 error = tsleep(ppb, PPBPRI|PCATCH, "ppbreq", 0);
473 break;
474
475 case (PPB_WAIT | PPB_NOINTR):
476 error = tsleep(ppb, PPBPRI, "ppbreq", 0);
477 break;
478
479 default:
480 return (EWOULDBLOCK);
481 break;
482 }
483
484 } else {
485 ppb->ppb_owner = dev;
486
487 /* restore the context of the device
488 * The first time, ctx.valid is certainly false
489 * then do not change anything. This is usefull for
490 * drivers that do not set there operating mode
491 * during attachement
492 */
493 if (ppbdev->ctx.valid)
494 ppb_set_mode(bus, ppbdev->ctx.mode);
495
496 splx(s);
497 return (0);
498 }
499 }
500
501 return (error);
502}
503
504/*
505 * ppb_release_bus()
506 *
507 * Release the device allocated with ppb_request_bus()
508 */
509int
510ppb_release_bus(device_t bus, device_t dev)
511{
512 int s, error;
513 struct ppb_data *ppb = DEVTOSOFTC(bus);
514 struct ppb_device *ppbdev = (struct ppb_device *)device_get_ivars(dev);
515
516 if (ppbdev->intr_resource != 0)
517 /* force interrupt handler unregistration when the ppbus is released */
518 if ((error = BUS_TEARDOWN_INTR(bus, dev, ppbdev->intr_resource,
519 ppbdev->intr_cookie)))
520 return (error);
521
522 s = splhigh();
523 if (ppb->ppb_owner != dev) {
524 splx(s);
525 return (EACCES);
526 }
527
528 ppb->ppb_owner = 0;
529 splx(s);
530
531 /* save the context of the device */
532 ppbdev->ctx.mode = ppb_get_mode(bus);
533
534 /* ok, now the context of the device is valid */
535 ppbdev->ctx.valid = 1;
536
537 /* wakeup waiting processes */
538 wakeup(ppb);
539
540 return (0);
541}
542
543static devclass_t ppbus_devclass;
544
545static device_method_t ppbus_methods[] = {
546 /* device interface */
547 DEVMETHOD(device_probe, ppbus_probe),
548 DEVMETHOD(device_attach, ppbus_attach),
549
550 /* bus interface */
551 DEVMETHOD(bus_add_child, ppbus_add_child),
552 DEVMETHOD(bus_print_child, ppbus_print_child),
553 DEVMETHOD(bus_read_ivar, ppbus_read_ivar),
554 DEVMETHOD(bus_write_ivar, ppbus_write_ivar),
555 DEVMETHOD(bus_setup_intr, ppbus_setup_intr),
556 DEVMETHOD(bus_teardown_intr, ppbus_teardown_intr),
557 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
558
559 { 0, 0 }
560};
561
562static driver_t ppbus_driver = {
563 "ppbus",
564 ppbus_methods,
565 sizeof(struct ppb_data),
566};
567DRIVER_MODULE(ppbus, ppc, ppbus_driver, ppbus_devclass, 0, 0);
| 46
47
48/*
49 * Device methods
50 */
51
52static void
53ppbus_print_child(device_t bus, device_t dev)
54{
55 struct ppb_device *ppbdev;
56
57 bus_print_child_header(bus, dev);
58
59 ppbdev = (struct ppb_device *)device_get_ivars(dev);
60
61 if (ppbdev->flags != 0)
62 printf(" flags 0x%x", ppbdev->flags);
63
64 printf(" on %s%d\n", device_get_name(bus), device_get_unit(bus));
65
66 return;
67}
68
69static int
70ppbus_probe(device_t dev)
71{
72 device_set_desc(dev, "Parallel port bus");
73
74 return (0);
75}
76
77/*
78 * ppbus_add_child()
79 *
80 * Add a ppbus device, allocate/initialize the ivars
81 */
82static device_t
83ppbus_add_child(device_t dev, int order, const char *name, int unit)
84{
85 struct ppb_device *ppbdev;
86 device_t child;
87
88 /* allocate ivars for the new ppbus child */
89 ppbdev = malloc(sizeof(struct ppb_device), M_PPBUSDEV, M_NOWAIT);
90 if (!ppbdev)
91 return NULL;
92 bzero(ppbdev, sizeof *ppbdev);
93
94 /* initialize the ivars */
95 ppbdev->name = name;
96
97 /* add the device as a child to the ppbus bus with the allocated
98 * ivars */
99 child = device_add_child_ordered(dev, order, name, unit);
100 device_set_ivars(child, ppbdev);
101
102 return child;
103}
104
105static int
106ppbus_read_ivar(device_t bus, device_t dev, int index, uintptr_t* val)
107{
108 struct ppb_device *ppbdev = (struct ppb_device *)device_get_ivars(dev);
109
110 switch (index) {
111 case PPBUS_IVAR_MODE:
112 /* XXX yet device mode = ppbus mode = chipset mode */
113 *val = (u_long)ppb_get_mode(bus);
114 ppbdev->mode = (u_short)*val;
115 break;
116 case PPBUS_IVAR_AVM:
117 *val = (u_long)ppbdev->avm;
118 break;
119 case PPBUS_IVAR_IRQ:
120 BUS_READ_IVAR(device_get_parent(bus), bus, PPC_IVAR_IRQ, val);
121 break;
122 default:
123 return (ENOENT);
124 }
125
126 return (0);
127}
128
129static int
130ppbus_write_ivar(device_t bus, device_t dev, int index, u_long val)
131{
132 struct ppb_device *ppbdev = (struct ppb_device *)device_get_ivars(dev);
133
134 switch (index) {
135 case PPBUS_IVAR_MODE:
136 /* XXX yet device mode = ppbus mode = chipset mode */
137 ppb_set_mode(bus,val);
138 ppbdev->mode = ppb_get_mode(bus);
139 break;
140 default:
141 return (ENOENT);
142 }
143
144 return (0);
145 }
146
147#define PPB_PNP_PRINTER 0
148#define PPB_PNP_MODEM 1
149#define PPB_PNP_NET 2
150#define PPB_PNP_HDC 3
151#define PPB_PNP_PCMCIA 4
152#define PPB_PNP_MEDIA 5
153#define PPB_PNP_FDC 6
154#define PPB_PNP_PORTS 7
155#define PPB_PNP_SCANNER 8
156#define PPB_PNP_DIGICAM 9
157
158#ifndef DONTPROBE_1284
159
160static char *pnp_tokens[] = {
161 "PRINTER", "MODEM", "NET", "HDC", "PCMCIA", "MEDIA",
162 "FDC", "PORTS", "SCANNER", "DIGICAM", "", NULL };
163
164#if 0
165static char *pnp_classes[] = {
166 "printer", "modem", "network device",
167 "hard disk", "PCMCIA", "multimedia device",
168 "floppy disk", "ports", "scanner",
169 "digital camera", "unknown device", NULL };
170#endif
171
172/*
173 * search_token()
174 *
175 * Search the first occurence of a token within a string
176 *
177 * XXX should use strxxx() calls
178 */
179static char *
180search_token(char *str, int slen, char *token)
181{
182 char *p;
183 int tlen, i, j;
184
185#define UNKNOWN_LENGTH -1
186
187 if (slen == UNKNOWN_LENGTH)
188 /* get string's length */
189 for (slen = 0, p = str; *p != '\0'; p++)
190 slen ++;
191
192 /* get token's length */
193 for (tlen = 0, p = token; *p != '\0'; p++)
194 tlen ++;
195
196 if (tlen == 0)
197 return (str);
198
199 for (i = 0; i <= slen-tlen; i++) {
200 for (j = 0; j < tlen; j++)
201 if (str[i+j] != token[j])
202 break;
203 if (j == tlen)
204 return (&str[i]);
205 }
206
207 return (NULL);
208}
209
210/*
211 * ppb_pnp_detect()
212 *
213 * Returns the class id. of the peripherial, -1 otherwise
214 */
215static int
216ppb_pnp_detect(device_t bus)
217{
218 char *token, *class = 0;
219 int i, len, error;
220 int class_id = -1;
221 char str[PPB_PnP_STRING_SIZE+1];
222 int unit = device_get_unit(bus);
223
224 printf("Probing for PnP devices on ppbus%d:\n", unit);
225
226 if ((error = ppb_1284_read_id(bus, PPB_NIBBLE, str,
227 PPB_PnP_STRING_SIZE, &len)))
228 goto end_detect;
229
230#ifdef DEBUG_1284
231 printf("ppb: <PnP> %d characters: ", len);
232 for (i = 0; i < len; i++)
233 printf("%c(0x%x) ", str[i], str[i]);
234 printf("\n");
235#endif
236
237 /* replace ';' characters by '\0' */
238 for (i = 0; i < len; i++)
239 str[i] = (str[i] == ';') ? '\0' : str[i];
240
241 if ((token = search_token(str, len, "MFG")) != NULL ||
242 (token = search_token(str, len, "MANUFACTURER")) != NULL)
243 printf("ppbus%d: <%s", unit,
244 search_token(token, UNKNOWN_LENGTH, ":") + 1);
245 else
246 printf("ppbus%d: <unknown", unit);
247
248 if ((token = search_token(str, len, "MDL")) != NULL ||
249 (token = search_token(str, len, "MODEL")) != NULL)
250 printf(" %s",
251 search_token(token, UNKNOWN_LENGTH, ":") + 1);
252 else
253 printf(" unknown");
254
255 if ((token = search_token(str, len, "VER")) != NULL)
256 printf("/%s",
257 search_token(token, UNKNOWN_LENGTH, ":") + 1);
258
259 if ((token = search_token(str, len, "REV")) != NULL)
260 printf(".%s",
261 search_token(token, UNKNOWN_LENGTH, ":") + 1);
262
263 printf(">");
264
265 if ((token = search_token(str, len, "CLS")) != NULL) {
266 class = search_token(token, UNKNOWN_LENGTH, ":") + 1;
267 printf(" %s", class);
268 }
269
270 if ((token = search_token(str, len, "CMD")) != NULL ||
271 (token = search_token(str, len, "COMMAND")) != NULL)
272 printf(" %s",
273 search_token(token, UNKNOWN_LENGTH, ":") + 1);
274
275 printf("\n");
276
277 if (class)
278 /* identify class ident */
279 for (i = 0; pnp_tokens[i] != NULL; i++) {
280 if (search_token(class, len, pnp_tokens[i]) != NULL) {
281 class_id = i;
282 goto end_detect;
283 }
284 }
285
286 class_id = PPB_PnP_UNKNOWN;
287
288end_detect:
289 return (class_id);
290}
291
292/*
293 * ppb_scan_bus()
294 *
295 * Scan the ppbus for IEEE1284 compliant devices
296 */
297static int
298ppb_scan_bus(device_t bus)
299{
300 struct ppb_data * ppb = (struct ppb_data *)device_get_softc(bus);
301 int error = 0;
302 int unit = device_get_unit(bus);
303
304 /* try all IEEE1284 modes, for one device only
305 *
306 * XXX We should implement the IEEE1284.3 standard to detect
307 * daisy chained devices
308 */
309
310 error = ppb_1284_negociate(bus, PPB_NIBBLE, PPB_REQUEST_ID);
311
312 if ((ppb->state == PPB_ERROR) && (ppb->error == PPB_NOT_IEEE1284))
313 goto end_scan;
314
315 ppb_1284_terminate(bus);
316
317 printf("ppbus%d: IEEE1284 device found ", unit);
318
319 if (!(error = ppb_1284_negociate(bus, PPB_NIBBLE, 0))) {
320 printf("/NIBBLE");
321 ppb_1284_terminate(bus);
322 }
323
324 if (!(error = ppb_1284_negociate(bus, PPB_PS2, 0))) {
325 printf("/PS2");
326 ppb_1284_terminate(bus);
327 }
328
329 if (!(error = ppb_1284_negociate(bus, PPB_ECP, 0))) {
330 printf("/ECP");
331 ppb_1284_terminate(bus);
332 }
333
334 if (!(error = ppb_1284_negociate(bus, PPB_ECP, PPB_USE_RLE))) {
335 printf("/ECP_RLE");
336 ppb_1284_terminate(bus);
337 }
338
339 if (!(error = ppb_1284_negociate(bus, PPB_EPP, 0))) {
340 printf("/EPP");
341 ppb_1284_terminate(bus);
342 }
343
344 /* try more IEEE1284 modes */
345 if (bootverbose) {
346 if (!(error = ppb_1284_negociate(bus, PPB_NIBBLE,
347 PPB_REQUEST_ID))) {
348 printf("/NIBBLE_ID");
349 ppb_1284_terminate(bus);
350 }
351
352 if (!(error = ppb_1284_negociate(bus, PPB_PS2,
353 PPB_REQUEST_ID))) {
354 printf("/PS2_ID");
355 ppb_1284_terminate(bus);
356 }
357
358 if (!(error = ppb_1284_negociate(bus, PPB_ECP,
359 PPB_REQUEST_ID))) {
360 printf("/ECP_ID");
361 ppb_1284_terminate(bus);
362 }
363
364 if (!(error = ppb_1284_negociate(bus, PPB_ECP,
365 PPB_REQUEST_ID | PPB_USE_RLE))) {
366 printf("/ECP_RLE_ID");
367 ppb_1284_terminate(bus);
368 }
369
370 if (!(error = ppb_1284_negociate(bus, PPB_COMPATIBLE,
371 PPB_EXTENSIBILITY_LINK))) {
372 printf("/Extensibility Link");
373 ppb_1284_terminate(bus);
374 }
375 }
376
377 printf("\n");
378
379 /* detect PnP devices */
380 ppb->class_id = ppb_pnp_detect(bus);
381
382 return (0);
383
384end_scan:
385 return (error);
386}
387
388#endif /* !DONTPROBE_1284 */
389
390static int
391ppbus_attach(device_t dev)
392{
393
394 /* Locate our children */
395 bus_generic_probe(dev);
396
397#ifndef DONTPROBE_1284
398 /* detect IEEE1284 compliant devices */
399 ppb_scan_bus(dev);
400#endif /* !DONTPROBE_1284 */
401
402 /* launch attachement of the added children */
403 bus_generic_attach(dev);
404
405 return 0;
406}
407
408static int
409ppbus_setup_intr(device_t bus, device_t child, struct resource *r, int flags,
410 void (*ihand)(void *), void *arg, void **cookiep)
411{
412 int error;
413 struct ppb_data *ppb = DEVTOSOFTC(bus);
414 struct ppb_device *ppbdev = (struct ppb_device *)device_get_ivars(child);
415
416 /* a device driver must own the bus to register an interrupt */
417 if (ppb->ppb_owner != child)
418 return (EINVAL);
419
420 if ((error = BUS_SETUP_INTR(device_get_parent(bus), child, r, flags,
421 ihand, arg, cookiep)))
422 return (error);
423
424 /* store the resource and the cookie for eventually forcing
425 * handler unregistration
426 */
427 ppbdev->intr_cookie = *cookiep;
428 ppbdev->intr_resource = r;
429
430 return (0);
431}
432
433static int
434ppbus_teardown_intr(device_t bus, device_t child, struct resource *r, void *ih)
435{
436 struct ppb_data *ppb = DEVTOSOFTC(bus);
437 struct ppb_device *ppbdev = (struct ppb_device *)device_get_ivars(child);
438
439 /* a device driver must own the bus to unregister an interrupt */
440 if ((ppb->ppb_owner != child) || (ppbdev->intr_cookie != ih) ||
441 (ppbdev->intr_resource != r))
442 return (EINVAL);
443
444 ppbdev->intr_cookie = 0;
445 ppbdev->intr_resource = 0;
446
447 /* pass unregistration to the upper layer */
448 return (BUS_TEARDOWN_INTR(device_get_parent(bus), child, r, ih));
449}
450
451/*
452 * ppb_request_bus()
453 *
454 * Allocate the device to perform transfers.
455 *
456 * how : PPB_WAIT or PPB_DONTWAIT
457 */
458int
459ppb_request_bus(device_t bus, device_t dev, int how)
460{
461 int s, error = 0;
462 struct ppb_data *ppb = DEVTOSOFTC(bus);
463 struct ppb_device *ppbdev = (struct ppb_device *)device_get_ivars(dev);
464
465 while (!error) {
466 s = splhigh();
467 if (ppb->ppb_owner) {
468 splx(s);
469
470 switch (how) {
471 case (PPB_WAIT | PPB_INTR):
472 error = tsleep(ppb, PPBPRI|PCATCH, "ppbreq", 0);
473 break;
474
475 case (PPB_WAIT | PPB_NOINTR):
476 error = tsleep(ppb, PPBPRI, "ppbreq", 0);
477 break;
478
479 default:
480 return (EWOULDBLOCK);
481 break;
482 }
483
484 } else {
485 ppb->ppb_owner = dev;
486
487 /* restore the context of the device
488 * The first time, ctx.valid is certainly false
489 * then do not change anything. This is usefull for
490 * drivers that do not set there operating mode
491 * during attachement
492 */
493 if (ppbdev->ctx.valid)
494 ppb_set_mode(bus, ppbdev->ctx.mode);
495
496 splx(s);
497 return (0);
498 }
499 }
500
501 return (error);
502}
503
504/*
505 * ppb_release_bus()
506 *
507 * Release the device allocated with ppb_request_bus()
508 */
509int
510ppb_release_bus(device_t bus, device_t dev)
511{
512 int s, error;
513 struct ppb_data *ppb = DEVTOSOFTC(bus);
514 struct ppb_device *ppbdev = (struct ppb_device *)device_get_ivars(dev);
515
516 if (ppbdev->intr_resource != 0)
517 /* force interrupt handler unregistration when the ppbus is released */
518 if ((error = BUS_TEARDOWN_INTR(bus, dev, ppbdev->intr_resource,
519 ppbdev->intr_cookie)))
520 return (error);
521
522 s = splhigh();
523 if (ppb->ppb_owner != dev) {
524 splx(s);
525 return (EACCES);
526 }
527
528 ppb->ppb_owner = 0;
529 splx(s);
530
531 /* save the context of the device */
532 ppbdev->ctx.mode = ppb_get_mode(bus);
533
534 /* ok, now the context of the device is valid */
535 ppbdev->ctx.valid = 1;
536
537 /* wakeup waiting processes */
538 wakeup(ppb);
539
540 return (0);
541}
542
543static devclass_t ppbus_devclass;
544
545static device_method_t ppbus_methods[] = {
546 /* device interface */
547 DEVMETHOD(device_probe, ppbus_probe),
548 DEVMETHOD(device_attach, ppbus_attach),
549
550 /* bus interface */
551 DEVMETHOD(bus_add_child, ppbus_add_child),
552 DEVMETHOD(bus_print_child, ppbus_print_child),
553 DEVMETHOD(bus_read_ivar, ppbus_read_ivar),
554 DEVMETHOD(bus_write_ivar, ppbus_write_ivar),
555 DEVMETHOD(bus_setup_intr, ppbus_setup_intr),
556 DEVMETHOD(bus_teardown_intr, ppbus_teardown_intr),
557 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
558
559 { 0, 0 }
560};
561
562static driver_t ppbus_driver = {
563 "ppbus",
564 ppbus_methods,
565 sizeof(struct ppb_data),
566};
567DRIVER_MODULE(ppbus, ppc, ppbus_driver, ppbus_devclass, 0, 0);
|