xref: /openbmc/linux/drivers/pnp/pnpacpi/rsparser.c (revision d5cb9783536a41df9f9cba5b0a1d78047ed787f7)
1 /*
2  * pnpacpi -- PnP ACPI driver
3  *
4  * Copyright (c) 2004 Matthieu Castet <castet.matthieu@free.fr>
5  * Copyright (c) 2004 Li Shaohua <shaohua.li@intel.com>
6  *
7  * This program is free software; you can redistribute it and/or modify it
8  * under the terms of the GNU General Public License as published by the
9  * Free Software Foundation; either version 2, or (at your option) any
10  * later version.
11  *
12  * This program is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
20  */
21 #include <linux/kernel.h>
22 #include <linux/acpi.h>
23 #include <linux/pci.h>
24 #include "pnpacpi.h"
25 
26 #ifdef CONFIG_IA64
27 #define valid_IRQ(i) (1)
28 #else
29 #define valid_IRQ(i) (((i) != 0) && ((i) != 2))
30 #endif
31 
32 /*
33  * Allocated Resources
34  */
35 static int irq_flags(int edge_level, int active_high_low)
36 {
37 	int flag;
38 	if (edge_level == ACPI_LEVEL_SENSITIVE) {
39 		if(active_high_low == ACPI_ACTIVE_LOW)
40 			flag = IORESOURCE_IRQ_LOWLEVEL;
41 		else
42 			flag = IORESOURCE_IRQ_HIGHLEVEL;
43 	}
44 	else {
45 		if(active_high_low == ACPI_ACTIVE_LOW)
46 			flag = IORESOURCE_IRQ_LOWEDGE;
47 		else
48 			flag = IORESOURCE_IRQ_HIGHEDGE;
49 	}
50 	return flag;
51 }
52 
53 static void decode_irq_flags(int flag, int *edge_level, int *active_high_low)
54 {
55 	switch (flag) {
56 	case IORESOURCE_IRQ_LOWLEVEL:
57 		*edge_level = ACPI_LEVEL_SENSITIVE;
58 		*active_high_low = ACPI_ACTIVE_LOW;
59 		break;
60 	case IORESOURCE_IRQ_HIGHLEVEL:
61 		*edge_level = ACPI_LEVEL_SENSITIVE;
62 		*active_high_low = ACPI_ACTIVE_HIGH;
63 		break;
64 	case IORESOURCE_IRQ_LOWEDGE:
65 		*edge_level = ACPI_EDGE_SENSITIVE;
66 		*active_high_low = ACPI_ACTIVE_LOW;
67 		break;
68 	case IORESOURCE_IRQ_HIGHEDGE:
69 		*edge_level = ACPI_EDGE_SENSITIVE;
70 		*active_high_low = ACPI_ACTIVE_HIGH;
71 		break;
72 	}
73 }
74 
75 static void
76 pnpacpi_parse_allocated_irqresource(struct pnp_resource_table * res, u32 gsi,
77 	int edge_level, int active_high_low)
78 {
79 	int i = 0;
80 	int irq;
81 
82 	if (!valid_IRQ(gsi))
83 		return;
84 
85 	while (!(res->irq_resource[i].flags & IORESOURCE_UNSET) &&
86 			i < PNP_MAX_IRQ)
87 		i++;
88 	if (i >= PNP_MAX_IRQ)
89 		return;
90 
91 	res->irq_resource[i].flags = IORESOURCE_IRQ;  // Also clears _UNSET flag
92 	irq = acpi_register_gsi(gsi, edge_level, active_high_low);
93 	if (irq < 0) {
94 		res->irq_resource[i].flags |= IORESOURCE_DISABLED;
95 		return;
96 	}
97 
98 	res->irq_resource[i].start = irq;
99 	res->irq_resource[i].end = irq;
100 	pcibios_penalize_isa_irq(irq, 1);
101 }
102 
103 static void
104 pnpacpi_parse_allocated_dmaresource(struct pnp_resource_table * res, u32 dma)
105 {
106 	int i = 0;
107 	while (i < PNP_MAX_DMA &&
108 			!(res->dma_resource[i].flags & IORESOURCE_UNSET))
109 		i++;
110 	if (i < PNP_MAX_DMA) {
111 		res->dma_resource[i].flags = IORESOURCE_DMA;  // Also clears _UNSET flag
112 		if (dma == -1) {
113 			res->dma_resource[i].flags |= IORESOURCE_DISABLED;
114 			return;
115 		}
116 		res->dma_resource[i].start = dma;
117 		res->dma_resource[i].end = dma;
118 	}
119 }
120 
121 static void
122 pnpacpi_parse_allocated_ioresource(struct pnp_resource_table * res,
123 	u32 io, u32 len)
124 {
125 	int i = 0;
126 	while (!(res->port_resource[i].flags & IORESOURCE_UNSET) &&
127 			i < PNP_MAX_PORT)
128 		i++;
129 	if (i < PNP_MAX_PORT) {
130 		res->port_resource[i].flags = IORESOURCE_IO;  // Also clears _UNSET flag
131 		if (len <= 0 || (io + len -1) >= 0x10003) {
132 			res->port_resource[i].flags |= IORESOURCE_DISABLED;
133 			return;
134 		}
135 		res->port_resource[i].start = io;
136 		res->port_resource[i].end = io + len - 1;
137 	}
138 }
139 
140 static void
141 pnpacpi_parse_allocated_memresource(struct pnp_resource_table * res,
142 	u64 mem, u64 len)
143 {
144 	int i = 0;
145 	while (!(res->mem_resource[i].flags & IORESOURCE_UNSET) &&
146 			(i < PNP_MAX_MEM))
147 		i++;
148 	if (i < PNP_MAX_MEM) {
149 		res->mem_resource[i].flags = IORESOURCE_MEM;  // Also clears _UNSET flag
150 		if (len <= 0) {
151 			res->mem_resource[i].flags |= IORESOURCE_DISABLED;
152 			return;
153 		}
154 		res->mem_resource[i].start = mem;
155 		res->mem_resource[i].end = mem + len - 1;
156 	}
157 }
158 
159 
160 static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
161 	void *data)
162 {
163 	struct pnp_resource_table * res_table = (struct pnp_resource_table *)data;
164 	int i;
165 
166 	switch (res->id) {
167 	case ACPI_RSTYPE_IRQ:
168 		/*
169 		 * Per spec, only one interrupt per descriptor is allowed in
170 		 * _CRS, but some firmware violates this, so parse them all.
171 		 */
172 		for (i = 0; i < res->data.irq.number_of_interrupts; i++) {
173 			pnpacpi_parse_allocated_irqresource(res_table,
174 				res->data.irq.interrupts[i],
175 				res->data.irq.edge_level,
176 				res->data.irq.active_high_low);
177 		}
178 		break;
179 
180 	case ACPI_RSTYPE_EXT_IRQ:
181 		for (i = 0; i < res->data.extended_irq.number_of_interrupts; i++) {
182 			pnpacpi_parse_allocated_irqresource(res_table,
183 				res->data.extended_irq.interrupts[i],
184 				res->data.extended_irq.edge_level,
185 				res->data.extended_irq.active_high_low);
186 		}
187 		break;
188 	case ACPI_RSTYPE_DMA:
189 		if (res->data.dma.number_of_channels > 0)
190 			pnpacpi_parse_allocated_dmaresource(res_table,
191 					res->data.dma.channels[0]);
192 		break;
193 	case ACPI_RSTYPE_IO:
194 		pnpacpi_parse_allocated_ioresource(res_table,
195 				res->data.io.min_base_address,
196 				res->data.io.range_length);
197 		break;
198 	case ACPI_RSTYPE_FIXED_IO:
199 		pnpacpi_parse_allocated_ioresource(res_table,
200 				res->data.fixed_io.base_address,
201 				res->data.fixed_io.range_length);
202 		break;
203 	case ACPI_RSTYPE_MEM24:
204 		pnpacpi_parse_allocated_memresource(res_table,
205 				res->data.memory24.min_base_address,
206 				res->data.memory24.range_length);
207 		break;
208 	case ACPI_RSTYPE_MEM32:
209 		pnpacpi_parse_allocated_memresource(res_table,
210 				res->data.memory32.min_base_address,
211 				res->data.memory32.range_length);
212 		break;
213 	case ACPI_RSTYPE_FIXED_MEM32:
214 		pnpacpi_parse_allocated_memresource(res_table,
215 				res->data.fixed_memory32.range_base_address,
216 				res->data.fixed_memory32.range_length);
217 		break;
218 	case ACPI_RSTYPE_ADDRESS16:
219 		pnpacpi_parse_allocated_memresource(res_table,
220 				res->data.address16.min_address_range,
221 				res->data.address16.address_length);
222 		break;
223 	case ACPI_RSTYPE_ADDRESS32:
224 		pnpacpi_parse_allocated_memresource(res_table,
225 				res->data.address32.min_address_range,
226 				res->data.address32.address_length);
227 		break;
228 	case ACPI_RSTYPE_ADDRESS64:
229 		pnpacpi_parse_allocated_memresource(res_table,
230 		res->data.address64.min_address_range,
231 		res->data.address64.address_length);
232 		break;
233 	case ACPI_RSTYPE_VENDOR:
234 		break;
235 	default:
236 		pnp_warn("PnPACPI: unknown resource type %d", res->id);
237 		return AE_ERROR;
238 	}
239 
240 	return AE_OK;
241 }
242 
243 acpi_status pnpacpi_parse_allocated_resource(acpi_handle handle, struct pnp_resource_table * res)
244 {
245 	/* Blank the resource table values */
246 	pnp_init_resource_table(res);
247 
248 	return acpi_walk_resources(handle, METHOD_NAME__CRS, pnpacpi_allocated_resource, res);
249 }
250 
251 static void pnpacpi_parse_dma_option(struct pnp_option *option, struct acpi_resource_dma *p)
252 {
253 	int i;
254 	struct pnp_dma * dma;
255 
256 	if (p->number_of_channels == 0)
257 		return;
258 	dma = kcalloc(1, sizeof(struct pnp_dma), GFP_KERNEL);
259 	if (!dma)
260 		return;
261 
262 	for(i = 0; i < p->number_of_channels; i++)
263 		dma->map |= 1 << p->channels[i];
264 	dma->flags = 0;
265 	if (p->bus_master)
266 		dma->flags |= IORESOURCE_DMA_MASTER;
267 	switch (p->type) {
268 	case ACPI_COMPATIBILITY:
269 		dma->flags |= IORESOURCE_DMA_COMPATIBLE;
270 		break;
271 	case ACPI_TYPE_A:
272 		dma->flags |= IORESOURCE_DMA_TYPEA;
273 		break;
274 	case ACPI_TYPE_B:
275 		dma->flags |= IORESOURCE_DMA_TYPEB;
276 		break;
277 	case ACPI_TYPE_F:
278 		dma->flags |= IORESOURCE_DMA_TYPEF;
279 		break;
280 	default:
281 		/* Set a default value ? */
282 		dma->flags |= IORESOURCE_DMA_COMPATIBLE;
283 		pnp_err("Invalid DMA type");
284 	}
285 	switch (p->transfer) {
286 	case ACPI_TRANSFER_8:
287 		dma->flags |= IORESOURCE_DMA_8BIT;
288 		break;
289 	case ACPI_TRANSFER_8_16:
290 		dma->flags |= IORESOURCE_DMA_8AND16BIT;
291 		break;
292 	case ACPI_TRANSFER_16:
293 		dma->flags |= IORESOURCE_DMA_16BIT;
294 		break;
295 	default:
296 		/* Set a default value ? */
297 		dma->flags |= IORESOURCE_DMA_8AND16BIT;
298 		pnp_err("Invalid DMA transfer type");
299 	}
300 
301 	pnp_register_dma_resource(option,dma);
302 	return;
303 }
304 
305 
306 static void pnpacpi_parse_irq_option(struct pnp_option *option,
307 	struct acpi_resource_irq *p)
308 {
309 	int i;
310 	struct pnp_irq * irq;
311 
312 	if (p->number_of_interrupts == 0)
313 		return;
314 	irq = kcalloc(1, sizeof(struct pnp_irq), GFP_KERNEL);
315 	if (!irq)
316 		return;
317 
318 	for(i = 0; i < p->number_of_interrupts; i++)
319 		if (p->interrupts[i])
320 			__set_bit(p->interrupts[i], irq->map);
321 	irq->flags = irq_flags(p->edge_level, p->active_high_low);
322 
323 	pnp_register_irq_resource(option, irq);
324 	return;
325 }
326 
327 static void pnpacpi_parse_ext_irq_option(struct pnp_option *option,
328 	struct acpi_resource_ext_irq *p)
329 {
330 	int i;
331 	struct pnp_irq * irq;
332 
333 	if (p->number_of_interrupts == 0)
334 		return;
335 	irq = kcalloc(1, sizeof(struct pnp_irq), GFP_KERNEL);
336 	if (!irq)
337 		return;
338 
339 	for(i = 0; i < p->number_of_interrupts; i++)
340 		if (p->interrupts[i])
341 			__set_bit(p->interrupts[i], irq->map);
342 	irq->flags = irq_flags(p->edge_level, p->active_high_low);
343 
344 	pnp_register_irq_resource(option, irq);
345 	return;
346 }
347 
348 static void
349 pnpacpi_parse_port_option(struct pnp_option *option,
350 	struct acpi_resource_io *io)
351 {
352 	struct pnp_port * port;
353 
354 	if (io->range_length == 0)
355 		return;
356 	port = kcalloc(1, sizeof(struct pnp_port), GFP_KERNEL);
357 	if (!port)
358 		return;
359 	port->min = io->min_base_address;
360 	port->max = io->max_base_address;
361 	port->align = io->alignment;
362 	port->size = io->range_length;
363 	port->flags = ACPI_DECODE_16 == io->io_decode ?
364 		PNP_PORT_FLAG_16BITADDR : 0;
365 	pnp_register_port_resource(option,port);
366 	return;
367 }
368 
369 static void
370 pnpacpi_parse_fixed_port_option(struct pnp_option *option,
371 	struct acpi_resource_fixed_io *io)
372 {
373 	struct pnp_port * port;
374 
375 	if (io->range_length == 0)
376 		return;
377 	port = kcalloc(1, sizeof(struct pnp_port), GFP_KERNEL);
378 	if (!port)
379 		return;
380 	port->min = port->max = io->base_address;
381 	port->size = io->range_length;
382 	port->align = 0;
383 	port->flags = PNP_PORT_FLAG_FIXED;
384 	pnp_register_port_resource(option,port);
385 	return;
386 }
387 
388 static void
389 pnpacpi_parse_mem24_option(struct pnp_option *option,
390 	struct acpi_resource_mem24 *p)
391 {
392 	struct pnp_mem * mem;
393 
394 	if (p->range_length == 0)
395 		return;
396 	mem = kcalloc(1, sizeof(struct pnp_mem), GFP_KERNEL);
397 	if (!mem)
398 		return;
399 	mem->min = p->min_base_address;
400 	mem->max = p->max_base_address;
401 	mem->align = p->alignment;
402 	mem->size = p->range_length;
403 
404 	mem->flags = (ACPI_READ_WRITE_MEMORY == p->read_write_attribute) ?
405 			IORESOURCE_MEM_WRITEABLE : 0;
406 
407 	pnp_register_mem_resource(option,mem);
408 	return;
409 }
410 
411 static void
412 pnpacpi_parse_mem32_option(struct pnp_option *option,
413 	struct acpi_resource_mem32 *p)
414 {
415 	struct pnp_mem * mem;
416 
417 	if (p->range_length == 0)
418 		return;
419 	mem = kcalloc(1, sizeof(struct pnp_mem), GFP_KERNEL);
420 	if (!mem)
421 		return;
422 	mem->min = p->min_base_address;
423 	mem->max = p->max_base_address;
424 	mem->align = p->alignment;
425 	mem->size = p->range_length;
426 
427 	mem->flags = (ACPI_READ_WRITE_MEMORY == p->read_write_attribute) ?
428 			IORESOURCE_MEM_WRITEABLE : 0;
429 
430 	pnp_register_mem_resource(option,mem);
431 	return;
432 }
433 
434 static void
435 pnpacpi_parse_fixed_mem32_option(struct pnp_option *option,
436 	struct acpi_resource_fixed_mem32 *p)
437 {
438 	struct pnp_mem * mem;
439 
440 	if (p->range_length == 0)
441 		return;
442 	mem = kcalloc(1, sizeof(struct pnp_mem), GFP_KERNEL);
443 	if (!mem)
444 		return;
445 	mem->min = mem->max = p->range_base_address;
446 	mem->size = p->range_length;
447 	mem->align = 0;
448 
449 	mem->flags = (ACPI_READ_WRITE_MEMORY == p->read_write_attribute) ?
450 			IORESOURCE_MEM_WRITEABLE : 0;
451 
452 	pnp_register_mem_resource(option,mem);
453 	return;
454 }
455 
456 struct acpipnp_parse_option_s {
457 	struct pnp_option *option;
458 	struct pnp_option *option_independent;
459 	struct pnp_dev *dev;
460 };
461 
462 static acpi_status pnpacpi_option_resource(struct acpi_resource *res,
463 	void *data)
464 {
465 	int priority = 0;
466 	struct acpipnp_parse_option_s *parse_data = (struct acpipnp_parse_option_s *)data;
467 	struct pnp_dev *dev = parse_data->dev;
468 	struct pnp_option *option = parse_data->option;
469 
470 	switch (res->id) {
471 		case ACPI_RSTYPE_IRQ:
472 			pnpacpi_parse_irq_option(option, &res->data.irq);
473 			break;
474 		case ACPI_RSTYPE_EXT_IRQ:
475 			pnpacpi_parse_ext_irq_option(option,
476 				&res->data.extended_irq);
477 			break;
478 		case ACPI_RSTYPE_DMA:
479 			pnpacpi_parse_dma_option(option, &res->data.dma);
480 			break;
481 		case ACPI_RSTYPE_IO:
482 			pnpacpi_parse_port_option(option, &res->data.io);
483 			break;
484 		case ACPI_RSTYPE_FIXED_IO:
485 			pnpacpi_parse_fixed_port_option(option,
486 				&res->data.fixed_io);
487 			break;
488 		case ACPI_RSTYPE_MEM24:
489 			pnpacpi_parse_mem24_option(option, &res->data.memory24);
490 			break;
491 		case ACPI_RSTYPE_MEM32:
492 			pnpacpi_parse_mem32_option(option, &res->data.memory32);
493 			break;
494 		case ACPI_RSTYPE_FIXED_MEM32:
495 			pnpacpi_parse_fixed_mem32_option(option,
496 				&res->data.fixed_memory32);
497 			break;
498 		case ACPI_RSTYPE_START_DPF:
499 			switch (res->data.start_dpf.compatibility_priority) {
500 				case ACPI_GOOD_CONFIGURATION:
501 					priority = PNP_RES_PRIORITY_PREFERRED;
502 					break;
503 
504 				case ACPI_ACCEPTABLE_CONFIGURATION:
505 					priority = PNP_RES_PRIORITY_ACCEPTABLE;
506 					break;
507 
508 				case ACPI_SUB_OPTIMAL_CONFIGURATION:
509 					priority = PNP_RES_PRIORITY_FUNCTIONAL;
510 					break;
511 				default:
512 					priority = PNP_RES_PRIORITY_INVALID;
513 					break;
514 			}
515 			/* TBD: Considering performace/robustness bits */
516 			option = pnp_register_dependent_option(dev, priority);
517 			if (!option)
518 				return AE_ERROR;
519 			parse_data->option = option;
520 			break;
521 		case ACPI_RSTYPE_END_DPF:
522 			/*only one EndDependentFn is allowed*/
523 			if (!parse_data->option_independent) {
524 				pnp_warn("PnPACPI: more than one EndDependentFn");
525 				return AE_ERROR;
526 			}
527 			parse_data->option = parse_data->option_independent;
528 			parse_data->option_independent = NULL;
529 			break;
530 		default:
531 			pnp_warn("PnPACPI: unknown resource type %d", res->id);
532 			return AE_ERROR;
533 	}
534 
535 	return AE_OK;
536 }
537 
538 acpi_status pnpacpi_parse_resource_option_data(acpi_handle handle,
539 	struct pnp_dev *dev)
540 {
541 	acpi_status status;
542 	struct acpipnp_parse_option_s parse_data;
543 
544 	parse_data.option = pnp_register_independent_option(dev);
545 	if (!parse_data.option)
546 		return AE_ERROR;
547 	parse_data.option_independent = parse_data.option;
548 	parse_data.dev = dev;
549 	status = acpi_walk_resources(handle, METHOD_NAME__PRS,
550 		pnpacpi_option_resource, &parse_data);
551 
552 	return status;
553 }
554 
555 /*
556  * Set resource
557  */
558 static acpi_status pnpacpi_count_resources(struct acpi_resource *res,
559 	void *data)
560 {
561 	int *res_cnt = (int *)data;
562 	switch (res->id) {
563 	case ACPI_RSTYPE_IRQ:
564 	case ACPI_RSTYPE_EXT_IRQ:
565 	case ACPI_RSTYPE_DMA:
566 	case ACPI_RSTYPE_IO:
567 	case ACPI_RSTYPE_FIXED_IO:
568 	case ACPI_RSTYPE_MEM24:
569 	case ACPI_RSTYPE_MEM32:
570 	case ACPI_RSTYPE_FIXED_MEM32:
571 #if 0
572 	case ACPI_RSTYPE_ADDRESS16:
573 	case ACPI_RSTYPE_ADDRESS32:
574 	case ACPI_RSTYPE_ADDRESS64:
575 #endif
576 		(*res_cnt) ++;
577 	default:
578 		return AE_OK;
579 	}
580 	return AE_OK;
581 }
582 
583 static acpi_status pnpacpi_type_resources(struct acpi_resource *res,
584 	void *data)
585 {
586 	struct acpi_resource **resource = (struct acpi_resource **)data;
587 	switch (res->id) {
588 	case ACPI_RSTYPE_IRQ:
589 	case ACPI_RSTYPE_EXT_IRQ:
590 	case ACPI_RSTYPE_DMA:
591 	case ACPI_RSTYPE_IO:
592 	case ACPI_RSTYPE_FIXED_IO:
593 	case ACPI_RSTYPE_MEM24:
594 	case ACPI_RSTYPE_MEM32:
595 	case ACPI_RSTYPE_FIXED_MEM32:
596 #if 0
597 	case ACPI_RSTYPE_ADDRESS16:
598 	case ACPI_RSTYPE_ADDRESS32:
599 	case ACPI_RSTYPE_ADDRESS64:
600 #endif
601 		(*resource)->id = res->id;
602 		(*resource)++;
603 	default:
604 		return AE_OK;
605 	}
606 
607 	return AE_OK;
608 }
609 
610 int pnpacpi_build_resource_template(acpi_handle handle,
611 	struct acpi_buffer *buffer)
612 {
613 	struct acpi_resource *resource;
614 	int res_cnt = 0;
615 	acpi_status status;
616 
617 	status = acpi_walk_resources(handle, METHOD_NAME__CRS,
618 		pnpacpi_count_resources, &res_cnt);
619 	if (ACPI_FAILURE(status)) {
620 		pnp_err("Evaluate _CRS failed");
621 		return -EINVAL;
622 	}
623 	if (!res_cnt)
624 		return -EINVAL;
625 	buffer->length = sizeof(struct acpi_resource) * (res_cnt + 1) + 1;
626 	buffer->pointer = kcalloc(1, buffer->length - 1, GFP_KERNEL);
627 	if (!buffer->pointer)
628 		return -ENOMEM;
629 	pnp_dbg("Res cnt %d", res_cnt);
630 	resource = (struct acpi_resource *)buffer->pointer;
631 	status = acpi_walk_resources(handle, METHOD_NAME__CRS,
632 		pnpacpi_type_resources, &resource);
633 	if (ACPI_FAILURE(status)) {
634 		kfree(buffer->pointer);
635 		pnp_err("Evaluate _CRS failed");
636 		return -EINVAL;
637 	}
638 	/* resource will pointer the end resource now */
639 	resource->id = ACPI_RSTYPE_END_TAG;
640 
641 	return 0;
642 }
643 
644 static void pnpacpi_encode_irq(struct acpi_resource *resource,
645 	struct resource *p)
646 {
647 	int edge_level, active_high_low;
648 
649 	decode_irq_flags(p->flags & IORESOURCE_BITS, &edge_level,
650 		&active_high_low);
651 	resource->id = ACPI_RSTYPE_IRQ;
652 	resource->length = sizeof(struct acpi_resource);
653 	resource->data.irq.edge_level = edge_level;
654 	resource->data.irq.active_high_low = active_high_low;
655 	if (edge_level == ACPI_EDGE_SENSITIVE)
656 		resource->data.irq.shared_exclusive = ACPI_EXCLUSIVE;
657 	else
658 		resource->data.irq.shared_exclusive = ACPI_SHARED;
659 	resource->data.irq.number_of_interrupts = 1;
660 	resource->data.irq.interrupts[0] = p->start;
661 }
662 
663 static void pnpacpi_encode_ext_irq(struct acpi_resource *resource,
664 	struct resource *p)
665 {
666 	int edge_level, active_high_low;
667 
668 	decode_irq_flags(p->flags & IORESOURCE_BITS, &edge_level,
669 		&active_high_low);
670 	resource->id = ACPI_RSTYPE_EXT_IRQ;
671 	resource->length = sizeof(struct acpi_resource);
672 	resource->data.extended_irq.producer_consumer = ACPI_CONSUMER;
673 	resource->data.extended_irq.edge_level = edge_level;
674 	resource->data.extended_irq.active_high_low = active_high_low;
675 	if (edge_level == ACPI_EDGE_SENSITIVE)
676 		resource->data.irq.shared_exclusive = ACPI_EXCLUSIVE;
677 	else
678 		resource->data.irq.shared_exclusive = ACPI_SHARED;
679 	resource->data.extended_irq.number_of_interrupts = 1;
680 	resource->data.extended_irq.interrupts[0] = p->start;
681 }
682 
683 static void pnpacpi_encode_dma(struct acpi_resource *resource,
684 	struct resource *p)
685 {
686 	resource->id = ACPI_RSTYPE_DMA;
687 	resource->length = sizeof(struct acpi_resource);
688 	/* Note: pnp_assign_dma will copy pnp_dma->flags into p->flags */
689 	if (p->flags & IORESOURCE_DMA_COMPATIBLE)
690 		resource->data.dma.type = ACPI_COMPATIBILITY;
691 	else if (p->flags & IORESOURCE_DMA_TYPEA)
692 		resource->data.dma.type = ACPI_TYPE_A;
693 	else if (p->flags & IORESOURCE_DMA_TYPEB)
694 		resource->data.dma.type = ACPI_TYPE_B;
695 	else if (p->flags & IORESOURCE_DMA_TYPEF)
696 		resource->data.dma.type = ACPI_TYPE_F;
697 	if (p->flags & IORESOURCE_DMA_8BIT)
698 		resource->data.dma.transfer = ACPI_TRANSFER_8;
699 	else if (p->flags & IORESOURCE_DMA_8AND16BIT)
700 		resource->data.dma.transfer = ACPI_TRANSFER_8_16;
701 	else if (p->flags & IORESOURCE_DMA_16BIT)
702 		resource->data.dma.transfer = ACPI_TRANSFER_16;
703 	resource->data.dma.bus_master = p->flags & IORESOURCE_DMA_MASTER;
704 	resource->data.dma.number_of_channels = 1;
705 	resource->data.dma.channels[0] = p->start;
706 }
707 
708 static void pnpacpi_encode_io(struct acpi_resource *resource,
709 	struct resource *p)
710 {
711 	resource->id = ACPI_RSTYPE_IO;
712 	resource->length = sizeof(struct acpi_resource);
713 	/* Note: pnp_assign_port will copy pnp_port->flags into p->flags */
714 	resource->data.io.io_decode = (p->flags & PNP_PORT_FLAG_16BITADDR)?
715 		ACPI_DECODE_16 : ACPI_DECODE_10;
716 	resource->data.io.min_base_address = p->start;
717 	resource->data.io.max_base_address = p->end;
718 	resource->data.io.alignment = 0; /* Correct? */
719 	resource->data.io.range_length = p->end - p->start + 1;
720 }
721 
722 static void pnpacpi_encode_fixed_io(struct acpi_resource *resource,
723 	struct resource *p)
724 {
725 	resource->id = ACPI_RSTYPE_FIXED_IO;
726 	resource->length = sizeof(struct acpi_resource);
727 	resource->data.fixed_io.base_address = p->start;
728 	resource->data.fixed_io.range_length = p->end - p->start + 1;
729 }
730 
731 static void pnpacpi_encode_mem24(struct acpi_resource *resource,
732 	struct resource *p)
733 {
734 	resource->id = ACPI_RSTYPE_MEM24;
735 	resource->length = sizeof(struct acpi_resource);
736 	/* Note: pnp_assign_mem will copy pnp_mem->flags into p->flags */
737 	resource->data.memory24.read_write_attribute =
738 		(p->flags & IORESOURCE_MEM_WRITEABLE) ?
739 		ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
740 	resource->data.memory24.min_base_address = p->start;
741 	resource->data.memory24.max_base_address = p->end;
742 	resource->data.memory24.alignment = 0;
743 	resource->data.memory24.range_length = p->end - p->start + 1;
744 }
745 
746 static void pnpacpi_encode_mem32(struct acpi_resource *resource,
747 	struct resource *p)
748 {
749 	resource->id = ACPI_RSTYPE_MEM32;
750 	resource->length = sizeof(struct acpi_resource);
751 	resource->data.memory32.read_write_attribute =
752 		(p->flags & IORESOURCE_MEM_WRITEABLE) ?
753 		ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
754 	resource->data.memory32.min_base_address = p->start;
755 	resource->data.memory32.max_base_address = p->end;
756 	resource->data.memory32.alignment = 0;
757 	resource->data.memory32.range_length = p->end - p->start + 1;
758 }
759 
760 static void pnpacpi_encode_fixed_mem32(struct acpi_resource *resource,
761 	struct resource *p)
762 {
763 	resource->id = ACPI_RSTYPE_FIXED_MEM32;
764 	resource->length = sizeof(struct acpi_resource);
765 	resource->data.fixed_memory32.read_write_attribute =
766 		(p->flags & IORESOURCE_MEM_WRITEABLE) ?
767 		ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
768 	resource->data.fixed_memory32.range_base_address = p->start;
769 	resource->data.fixed_memory32.range_length = p->end - p->start + 1;
770 }
771 
772 int pnpacpi_encode_resources(struct pnp_resource_table *res_table,
773 	struct acpi_buffer *buffer)
774 {
775 	int i = 0;
776 	/* pnpacpi_build_resource_template allocates extra mem */
777 	int res_cnt = (buffer->length - 1)/sizeof(struct acpi_resource) - 1;
778 	struct acpi_resource *resource = (struct acpi_resource*)buffer->pointer;
779 	int port = 0, irq = 0, dma = 0, mem = 0;
780 
781 	pnp_dbg("res cnt %d", res_cnt);
782 	while (i < res_cnt) {
783 		switch(resource->id) {
784 		case ACPI_RSTYPE_IRQ:
785 			pnp_dbg("Encode irq");
786 			pnpacpi_encode_irq(resource,
787 				&res_table->irq_resource[irq]);
788 			irq++;
789 			break;
790 
791 		case ACPI_RSTYPE_EXT_IRQ:
792 			pnp_dbg("Encode ext irq");
793 			pnpacpi_encode_ext_irq(resource,
794 				&res_table->irq_resource[irq]);
795 			irq++;
796 			break;
797 		case ACPI_RSTYPE_DMA:
798 			pnp_dbg("Encode dma");
799 			pnpacpi_encode_dma(resource,
800 				&res_table->dma_resource[dma]);
801 			dma ++;
802 			break;
803 		case ACPI_RSTYPE_IO:
804 			pnp_dbg("Encode io");
805 			pnpacpi_encode_io(resource,
806 				&res_table->port_resource[port]);
807 			port ++;
808 			break;
809 		case ACPI_RSTYPE_FIXED_IO:
810 			pnp_dbg("Encode fixed io");
811 			pnpacpi_encode_fixed_io(resource,
812 				&res_table->port_resource[port]);
813 			port ++;
814 			break;
815 		case ACPI_RSTYPE_MEM24:
816 			pnp_dbg("Encode mem24");
817 			pnpacpi_encode_mem24(resource,
818 				&res_table->mem_resource[mem]);
819 			mem ++;
820 			break;
821 		case ACPI_RSTYPE_MEM32:
822 			pnp_dbg("Encode mem32");
823 			pnpacpi_encode_mem32(resource,
824 				&res_table->mem_resource[mem]);
825 			mem ++;
826 			break;
827 		case ACPI_RSTYPE_FIXED_MEM32:
828 			pnp_dbg("Encode fixed mem32");
829 			pnpacpi_encode_fixed_mem32(resource,
830 				&res_table->mem_resource[mem]);
831 			mem ++;
832 			break;
833 		default: /* other type */
834 			pnp_warn("unknown resource type %d", resource->id);
835 			return -EINVAL;
836 		}
837 		resource ++;
838 		i ++;
839 	}
840 	return 0;
841 }
842