xref: /openbmc/linux/drivers/pnp/pnpacpi/rsparser.c (revision b6dcefde)
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  * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
7  *	Bjorn Helgaas <bjorn.helgaas@hp.com>
8  *
9  * This program is free software; you can redistribute it and/or modify it
10  * under the terms of the GNU General Public License as published by the
11  * Free Software Foundation; either version 2, or (at your option) any
12  * later version.
13  *
14  * This program is distributed in the hope that it will be useful, but
15  * WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17  * General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program; if not, write to the Free Software
21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
22  */
23 #include <linux/kernel.h>
24 #include <linux/acpi.h>
25 #include <linux/pci.h>
26 #include <linux/pnp.h>
27 #include "../base.h"
28 #include "pnpacpi.h"
29 
30 #ifdef CONFIG_IA64
31 #define valid_IRQ(i) (1)
32 #else
33 #define valid_IRQ(i) (((i) != 0) && ((i) != 2))
34 #endif
35 
36 /*
37  * Allocated Resources
38  */
39 static int irq_flags(int triggering, int polarity, int shareable)
40 {
41 	int flags;
42 
43 	if (triggering == ACPI_LEVEL_SENSITIVE) {
44 		if (polarity == ACPI_ACTIVE_LOW)
45 			flags = IORESOURCE_IRQ_LOWLEVEL;
46 		else
47 			flags = IORESOURCE_IRQ_HIGHLEVEL;
48 	} else {
49 		if (polarity == ACPI_ACTIVE_LOW)
50 			flags = IORESOURCE_IRQ_LOWEDGE;
51 		else
52 			flags = IORESOURCE_IRQ_HIGHEDGE;
53 	}
54 
55 	if (shareable == ACPI_SHARED)
56 		flags |= IORESOURCE_IRQ_SHAREABLE;
57 
58 	return flags;
59 }
60 
61 static void decode_irq_flags(struct pnp_dev *dev, int flags, int *triggering,
62 			     int *polarity, int *shareable)
63 {
64 	switch (flags & (IORESOURCE_IRQ_LOWLEVEL | IORESOURCE_IRQ_HIGHLEVEL |
65 			 IORESOURCE_IRQ_LOWEDGE  | IORESOURCE_IRQ_HIGHEDGE)) {
66 	case IORESOURCE_IRQ_LOWLEVEL:
67 		*triggering = ACPI_LEVEL_SENSITIVE;
68 		*polarity = ACPI_ACTIVE_LOW;
69 		break;
70 	case IORESOURCE_IRQ_HIGHLEVEL:
71 		*triggering = ACPI_LEVEL_SENSITIVE;
72 		*polarity = ACPI_ACTIVE_HIGH;
73 		break;
74 	case IORESOURCE_IRQ_LOWEDGE:
75 		*triggering = ACPI_EDGE_SENSITIVE;
76 		*polarity = ACPI_ACTIVE_LOW;
77 		break;
78 	case IORESOURCE_IRQ_HIGHEDGE:
79 		*triggering = ACPI_EDGE_SENSITIVE;
80 		*polarity = ACPI_ACTIVE_HIGH;
81 		break;
82 	default:
83 		dev_err(&dev->dev, "can't encode invalid IRQ mode %#x\n",
84 			flags);
85 		*triggering = ACPI_EDGE_SENSITIVE;
86 		*polarity = ACPI_ACTIVE_HIGH;
87 		break;
88 	}
89 
90 	if (flags & IORESOURCE_IRQ_SHAREABLE)
91 		*shareable = ACPI_SHARED;
92 	else
93 		*shareable = ACPI_EXCLUSIVE;
94 }
95 
96 static void pnpacpi_parse_allocated_irqresource(struct pnp_dev *dev,
97 						u32 gsi, int triggering,
98 						int polarity, int shareable)
99 {
100 	int irq, flags;
101 	int p, t;
102 
103 	if (!valid_IRQ(gsi)) {
104 		pnp_add_irq_resource(dev, gsi, IORESOURCE_DISABLED);
105 		return;
106 	}
107 
108 	/*
109 	 * in IO-APIC mode, use overrided attribute. Two reasons:
110 	 * 1. BIOS bug in DSDT
111 	 * 2. BIOS uses IO-APIC mode Interrupt Source Override
112 	 */
113 	if (!acpi_get_override_irq(gsi, &t, &p)) {
114 		t = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
115 		p = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
116 
117 		if (triggering != t || polarity != p) {
118 			dev_warn(&dev->dev, "IRQ %d override to %s, %s\n",
119 				gsi, t ? "edge":"level", p ? "low":"high");
120 			triggering = t;
121 			polarity = p;
122 		}
123 	}
124 
125 	flags = irq_flags(triggering, polarity, shareable);
126 	irq = acpi_register_gsi(&dev->dev, gsi, triggering, polarity);
127 	if (irq >= 0)
128 		pcibios_penalize_isa_irq(irq, 1);
129 	else
130 		flags |= IORESOURCE_DISABLED;
131 
132 	pnp_add_irq_resource(dev, irq, flags);
133 }
134 
135 static int dma_flags(struct pnp_dev *dev, int type, int bus_master,
136 		     int transfer)
137 {
138 	int flags = 0;
139 
140 	if (bus_master)
141 		flags |= IORESOURCE_DMA_MASTER;
142 	switch (type) {
143 	case ACPI_COMPATIBILITY:
144 		flags |= IORESOURCE_DMA_COMPATIBLE;
145 		break;
146 	case ACPI_TYPE_A:
147 		flags |= IORESOURCE_DMA_TYPEA;
148 		break;
149 	case ACPI_TYPE_B:
150 		flags |= IORESOURCE_DMA_TYPEB;
151 		break;
152 	case ACPI_TYPE_F:
153 		flags |= IORESOURCE_DMA_TYPEF;
154 		break;
155 	default:
156 		/* Set a default value ? */
157 		flags |= IORESOURCE_DMA_COMPATIBLE;
158 		dev_err(&dev->dev, "invalid DMA type %d\n", type);
159 	}
160 	switch (transfer) {
161 	case ACPI_TRANSFER_8:
162 		flags |= IORESOURCE_DMA_8BIT;
163 		break;
164 	case ACPI_TRANSFER_8_16:
165 		flags |= IORESOURCE_DMA_8AND16BIT;
166 		break;
167 	case ACPI_TRANSFER_16:
168 		flags |= IORESOURCE_DMA_16BIT;
169 		break;
170 	default:
171 		/* Set a default value ? */
172 		flags |= IORESOURCE_DMA_8AND16BIT;
173 		dev_err(&dev->dev, "invalid DMA transfer type %d\n", transfer);
174 	}
175 
176 	return flags;
177 }
178 
179 static void pnpacpi_parse_allocated_ioresource(struct pnp_dev *dev, u64 start,
180 					       u64 len, int io_decode)
181 {
182 	int flags = 0;
183 	u64 end = start + len - 1;
184 
185 	if (io_decode == ACPI_DECODE_16)
186 		flags |= IORESOURCE_IO_16BIT_ADDR;
187 	if (len == 0 || end >= 0x10003)
188 		flags |= IORESOURCE_DISABLED;
189 
190 	pnp_add_io_resource(dev, start, end, flags);
191 }
192 
193 /*
194  * Device CSRs that do not appear in PCI config space should be described
195  * via ACPI.  This would normally be done with Address Space Descriptors
196  * marked as "consumer-only," but old versions of Windows and Linux ignore
197  * the producer/consumer flag, so HP invented a vendor-defined resource to
198  * describe the location and size of CSR space.
199  */
200 static struct acpi_vendor_uuid hp_ccsr_uuid = {
201 	.subtype = 2,
202 	.data = { 0xf9, 0xad, 0xe9, 0x69, 0x4f, 0x92, 0x5f, 0xab, 0xf6, 0x4a,
203 	    0x24, 0xd2, 0x01, 0x37, 0x0e, 0xad },
204 };
205 
206 static int vendor_resource_matches(struct pnp_dev *dev,
207 				   struct acpi_resource_vendor_typed *vendor,
208 				   struct acpi_vendor_uuid *match,
209 				   int expected_len)
210 {
211 	int uuid_len = sizeof(vendor->uuid);
212 	u8 uuid_subtype = vendor->uuid_subtype;
213 	u8 *uuid = vendor->uuid;
214 	int actual_len;
215 
216 	/* byte_length includes uuid_subtype and uuid */
217 	actual_len = vendor->byte_length - uuid_len - 1;
218 
219 	if (uuid_subtype == match->subtype &&
220 	    uuid_len == sizeof(match->data) &&
221 	    memcmp(uuid, match->data, uuid_len) == 0) {
222 		if (expected_len && expected_len != actual_len) {
223 			dev_err(&dev->dev, "wrong vendor descriptor size; "
224 				"expected %d, found %d bytes\n",
225 				expected_len, actual_len);
226 			return 0;
227 		}
228 
229 		return 1;
230 	}
231 
232 	return 0;
233 }
234 
235 static void pnpacpi_parse_allocated_vendor(struct pnp_dev *dev,
236 				    struct acpi_resource_vendor_typed *vendor)
237 {
238 	if (vendor_resource_matches(dev, vendor, &hp_ccsr_uuid, 16)) {
239 		u64 start, length;
240 
241 		memcpy(&start, vendor->byte_data, sizeof(start));
242 		memcpy(&length, vendor->byte_data + 8, sizeof(length));
243 
244 		pnp_add_mem_resource(dev, start, start + length - 1, 0);
245 	}
246 }
247 
248 static void pnpacpi_parse_allocated_memresource(struct pnp_dev *dev,
249 						u64 start, u64 len,
250 						int write_protect)
251 {
252 	int flags = 0;
253 	u64 end = start + len - 1;
254 
255 	if (len == 0)
256 		flags |= IORESOURCE_DISABLED;
257 	if (write_protect == ACPI_READ_WRITE_MEMORY)
258 		flags |= IORESOURCE_MEM_WRITEABLE;
259 
260 	pnp_add_mem_resource(dev, start, end, flags);
261 }
262 
263 static void pnpacpi_parse_allocated_address_space(struct pnp_dev *dev,
264 						  struct acpi_resource *res)
265 {
266 	struct acpi_resource_address64 addr, *p = &addr;
267 	acpi_status status;
268 
269 	status = acpi_resource_to_address64(res, p);
270 	if (!ACPI_SUCCESS(status)) {
271 		dev_warn(&dev->dev, "failed to convert resource type %d\n",
272 			 res->type);
273 		return;
274 	}
275 
276 	if (p->producer_consumer == ACPI_PRODUCER)
277 		return;
278 
279 	if (p->resource_type == ACPI_MEMORY_RANGE)
280 		pnpacpi_parse_allocated_memresource(dev,
281 			p->minimum, p->address_length,
282 			p->info.mem.write_protect);
283 	else if (p->resource_type == ACPI_IO_RANGE)
284 		pnpacpi_parse_allocated_ioresource(dev,
285 			p->minimum, p->address_length,
286 			p->granularity == 0xfff ? ACPI_DECODE_10 :
287 				ACPI_DECODE_16);
288 }
289 
290 static void pnpacpi_parse_allocated_ext_address_space(struct pnp_dev *dev,
291 						      struct acpi_resource *res)
292 {
293 	struct acpi_resource_extended_address64 *p = &res->data.ext_address64;
294 
295 	if (p->producer_consumer == ACPI_PRODUCER)
296 		return;
297 
298 	if (p->resource_type == ACPI_MEMORY_RANGE)
299 		pnpacpi_parse_allocated_memresource(dev,
300 			p->minimum, p->address_length,
301 			p->info.mem.write_protect);
302 	else if (p->resource_type == ACPI_IO_RANGE)
303 		pnpacpi_parse_allocated_ioresource(dev,
304 			p->minimum, p->address_length,
305 			p->granularity == 0xfff ? ACPI_DECODE_10 :
306 				ACPI_DECODE_16);
307 }
308 
309 static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
310 					      void *data)
311 {
312 	struct pnp_dev *dev = data;
313 	struct acpi_resource_irq *irq;
314 	struct acpi_resource_dma *dma;
315 	struct acpi_resource_io *io;
316 	struct acpi_resource_fixed_io *fixed_io;
317 	struct acpi_resource_vendor_typed *vendor_typed;
318 	struct acpi_resource_memory24 *memory24;
319 	struct acpi_resource_memory32 *memory32;
320 	struct acpi_resource_fixed_memory32 *fixed_memory32;
321 	struct acpi_resource_extended_irq *extended_irq;
322 	int i, flags;
323 
324 	switch (res->type) {
325 	case ACPI_RESOURCE_TYPE_IRQ:
326 		/*
327 		 * Per spec, only one interrupt per descriptor is allowed in
328 		 * _CRS, but some firmware violates this, so parse them all.
329 		 */
330 		irq = &res->data.irq;
331 		if (irq->interrupt_count == 0)
332 			pnp_add_irq_resource(dev, 0, IORESOURCE_DISABLED);
333 		else {
334 			for (i = 0; i < irq->interrupt_count; i++) {
335 				pnpacpi_parse_allocated_irqresource(dev,
336 					irq->interrupts[i],
337 					irq->triggering,
338 					irq->polarity,
339 				    irq->sharable);
340 			}
341 
342 			/*
343 			 * The IRQ encoder puts a single interrupt in each
344 			 * descriptor, so if a _CRS descriptor has more than
345 			 * one interrupt, we won't be able to re-encode it.
346 			 */
347 			if (pnp_can_write(dev) && irq->interrupt_count > 1) {
348 				dev_warn(&dev->dev, "multiple interrupts in "
349 					 "_CRS descriptor; configuration can't "
350 					 "be changed\n");
351 				dev->capabilities &= ~PNP_WRITE;
352 			}
353 		}
354 		break;
355 
356 	case ACPI_RESOURCE_TYPE_DMA:
357 		dma = &res->data.dma;
358 		if (dma->channel_count > 0 && dma->channels[0] != (u8) -1)
359 			flags = dma_flags(dev, dma->type, dma->bus_master,
360 					  dma->transfer);
361 		else
362 			flags = IORESOURCE_DISABLED;
363 		pnp_add_dma_resource(dev, dma->channels[0], flags);
364 		break;
365 
366 	case ACPI_RESOURCE_TYPE_IO:
367 		io = &res->data.io;
368 		pnpacpi_parse_allocated_ioresource(dev,
369 			io->minimum,
370 			io->address_length,
371 			io->io_decode);
372 		break;
373 
374 	case ACPI_RESOURCE_TYPE_START_DEPENDENT:
375 	case ACPI_RESOURCE_TYPE_END_DEPENDENT:
376 		break;
377 
378 	case ACPI_RESOURCE_TYPE_FIXED_IO:
379 		fixed_io = &res->data.fixed_io;
380 		pnpacpi_parse_allocated_ioresource(dev,
381 			fixed_io->address,
382 			fixed_io->address_length,
383 			ACPI_DECODE_10);
384 		break;
385 
386 	case ACPI_RESOURCE_TYPE_VENDOR:
387 		vendor_typed = &res->data.vendor_typed;
388 		pnpacpi_parse_allocated_vendor(dev, vendor_typed);
389 		break;
390 
391 	case ACPI_RESOURCE_TYPE_END_TAG:
392 		break;
393 
394 	case ACPI_RESOURCE_TYPE_MEMORY24:
395 		memory24 = &res->data.memory24;
396 		pnpacpi_parse_allocated_memresource(dev,
397 			memory24->minimum,
398 			memory24->address_length,
399 			memory24->write_protect);
400 		break;
401 	case ACPI_RESOURCE_TYPE_MEMORY32:
402 		memory32 = &res->data.memory32;
403 		pnpacpi_parse_allocated_memresource(dev,
404 			memory32->minimum,
405 			memory32->address_length,
406 			memory32->write_protect);
407 		break;
408 	case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
409 		fixed_memory32 = &res->data.fixed_memory32;
410 		pnpacpi_parse_allocated_memresource(dev,
411 			fixed_memory32->address,
412 			fixed_memory32->address_length,
413 			fixed_memory32->write_protect);
414 		break;
415 	case ACPI_RESOURCE_TYPE_ADDRESS16:
416 	case ACPI_RESOURCE_TYPE_ADDRESS32:
417 	case ACPI_RESOURCE_TYPE_ADDRESS64:
418 		pnpacpi_parse_allocated_address_space(dev, res);
419 		break;
420 
421 	case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
422 		pnpacpi_parse_allocated_ext_address_space(dev, res);
423 		break;
424 
425 	case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
426 		extended_irq = &res->data.extended_irq;
427 
428 		if (extended_irq->interrupt_count == 0)
429 			pnp_add_irq_resource(dev, 0, IORESOURCE_DISABLED);
430 		else {
431 			for (i = 0; i < extended_irq->interrupt_count; i++) {
432 				pnpacpi_parse_allocated_irqresource(dev,
433 					extended_irq->interrupts[i],
434 					extended_irq->triggering,
435 					extended_irq->polarity,
436 					extended_irq->sharable);
437 			}
438 
439 			/*
440 			 * The IRQ encoder puts a single interrupt in each
441 			 * descriptor, so if a _CRS descriptor has more than
442 			 * one interrupt, we won't be able to re-encode it.
443 			 */
444 			if (pnp_can_write(dev) &&
445 			    extended_irq->interrupt_count > 1) {
446 				dev_warn(&dev->dev, "multiple interrupts in "
447 					 "_CRS descriptor; configuration can't "
448 					 "be changed\n");
449 				dev->capabilities &= ~PNP_WRITE;
450 			}
451 		}
452 		break;
453 
454 	case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
455 		break;
456 
457 	default:
458 		dev_warn(&dev->dev, "unknown resource type %d in _CRS\n",
459 			 res->type);
460 		return AE_ERROR;
461 	}
462 
463 	return AE_OK;
464 }
465 
466 int pnpacpi_parse_allocated_resource(struct pnp_dev *dev)
467 {
468 	struct acpi_device *acpi_dev = dev->data;
469 	acpi_handle handle = acpi_dev->handle;
470 	acpi_status status;
471 
472 	pnp_dbg(&dev->dev, "parse allocated resources\n");
473 
474 	pnp_init_resources(dev);
475 
476 	status = acpi_walk_resources(handle, METHOD_NAME__CRS,
477 				     pnpacpi_allocated_resource, dev);
478 
479 	if (ACPI_FAILURE(status)) {
480 		if (status != AE_NOT_FOUND)
481 			dev_err(&dev->dev, "can't evaluate _CRS: %d", status);
482 		return -EPERM;
483 	}
484 	return 0;
485 }
486 
487 static __init void pnpacpi_parse_dma_option(struct pnp_dev *dev,
488 					    unsigned int option_flags,
489 					    struct acpi_resource_dma *p)
490 {
491 	int i;
492 	unsigned char map = 0, flags;
493 
494 	if (p->channel_count == 0)
495 		return;
496 
497 	for (i = 0; i < p->channel_count; i++)
498 		map |= 1 << p->channels[i];
499 
500 	flags = dma_flags(dev, p->type, p->bus_master, p->transfer);
501 	pnp_register_dma_resource(dev, option_flags, map, flags);
502 }
503 
504 static __init void pnpacpi_parse_irq_option(struct pnp_dev *dev,
505 					    unsigned int option_flags,
506 					    struct acpi_resource_irq *p)
507 {
508 	int i;
509 	pnp_irq_mask_t map;
510 	unsigned char flags;
511 
512 	if (p->interrupt_count == 0)
513 		return;
514 
515 	bitmap_zero(map.bits, PNP_IRQ_NR);
516 	for (i = 0; i < p->interrupt_count; i++)
517 		if (p->interrupts[i])
518 			__set_bit(p->interrupts[i], map.bits);
519 
520 	flags = irq_flags(p->triggering, p->polarity, p->sharable);
521 	pnp_register_irq_resource(dev, option_flags, &map, flags);
522 }
523 
524 static __init void pnpacpi_parse_ext_irq_option(struct pnp_dev *dev,
525 					unsigned int option_flags,
526 					struct acpi_resource_extended_irq *p)
527 {
528 	int i;
529 	pnp_irq_mask_t map;
530 	unsigned char flags;
531 
532 	if (p->interrupt_count == 0)
533 		return;
534 
535 	bitmap_zero(map.bits, PNP_IRQ_NR);
536 	for (i = 0; i < p->interrupt_count; i++) {
537 		if (p->interrupts[i]) {
538 			if (p->interrupts[i] < PNP_IRQ_NR)
539 				__set_bit(p->interrupts[i], map.bits);
540 			else
541 				dev_err(&dev->dev, "ignoring IRQ %d option "
542 					"(too large for %d entry bitmap)\n",
543 					p->interrupts[i], PNP_IRQ_NR);
544 		}
545 	}
546 
547 	flags = irq_flags(p->triggering, p->polarity, p->sharable);
548 	pnp_register_irq_resource(dev, option_flags, &map, flags);
549 }
550 
551 static __init void pnpacpi_parse_port_option(struct pnp_dev *dev,
552 					     unsigned int option_flags,
553 					     struct acpi_resource_io *io)
554 {
555 	unsigned char flags = 0;
556 
557 	if (io->address_length == 0)
558 		return;
559 
560 	if (io->io_decode == ACPI_DECODE_16)
561 		flags = IORESOURCE_IO_16BIT_ADDR;
562 	pnp_register_port_resource(dev, option_flags, io->minimum, io->maximum,
563 				   io->alignment, io->address_length, flags);
564 }
565 
566 static __init void pnpacpi_parse_fixed_port_option(struct pnp_dev *dev,
567 					unsigned int option_flags,
568 					struct acpi_resource_fixed_io *io)
569 {
570 	if (io->address_length == 0)
571 		return;
572 
573 	pnp_register_port_resource(dev, option_flags, io->address, io->address,
574 				   0, io->address_length, IORESOURCE_IO_FIXED);
575 }
576 
577 static __init void pnpacpi_parse_mem24_option(struct pnp_dev *dev,
578 					      unsigned int option_flags,
579 					      struct acpi_resource_memory24 *p)
580 {
581 	unsigned char flags = 0;
582 
583 	if (p->address_length == 0)
584 		return;
585 
586 	if (p->write_protect == ACPI_READ_WRITE_MEMORY)
587 		flags = IORESOURCE_MEM_WRITEABLE;
588 	pnp_register_mem_resource(dev, option_flags, p->minimum, p->maximum,
589 				  p->alignment, p->address_length, flags);
590 }
591 
592 static __init void pnpacpi_parse_mem32_option(struct pnp_dev *dev,
593 					      unsigned int option_flags,
594 					      struct acpi_resource_memory32 *p)
595 {
596 	unsigned char flags = 0;
597 
598 	if (p->address_length == 0)
599 		return;
600 
601 	if (p->write_protect == ACPI_READ_WRITE_MEMORY)
602 		flags = IORESOURCE_MEM_WRITEABLE;
603 	pnp_register_mem_resource(dev, option_flags, p->minimum, p->maximum,
604 				  p->alignment, p->address_length, flags);
605 }
606 
607 static __init void pnpacpi_parse_fixed_mem32_option(struct pnp_dev *dev,
608 					unsigned int option_flags,
609 					struct acpi_resource_fixed_memory32 *p)
610 {
611 	unsigned char flags = 0;
612 
613 	if (p->address_length == 0)
614 		return;
615 
616 	if (p->write_protect == ACPI_READ_WRITE_MEMORY)
617 		flags = IORESOURCE_MEM_WRITEABLE;
618 	pnp_register_mem_resource(dev, option_flags, p->address, p->address,
619 				  0, p->address_length, flags);
620 }
621 
622 static __init void pnpacpi_parse_address_option(struct pnp_dev *dev,
623 						unsigned int option_flags,
624 						struct acpi_resource *r)
625 {
626 	struct acpi_resource_address64 addr, *p = &addr;
627 	acpi_status status;
628 	unsigned char flags = 0;
629 
630 	status = acpi_resource_to_address64(r, p);
631 	if (ACPI_FAILURE(status)) {
632 		dev_warn(&dev->dev, "can't convert resource type %d\n",
633 			 r->type);
634 		return;
635 	}
636 
637 	if (p->address_length == 0)
638 		return;
639 
640 	if (p->resource_type == ACPI_MEMORY_RANGE) {
641 		if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY)
642 			flags = IORESOURCE_MEM_WRITEABLE;
643 		pnp_register_mem_resource(dev, option_flags, p->minimum,
644 					  p->minimum, 0, p->address_length,
645 					  flags);
646 	} else if (p->resource_type == ACPI_IO_RANGE)
647 		pnp_register_port_resource(dev, option_flags, p->minimum,
648 					   p->minimum, 0, p->address_length,
649 					   IORESOURCE_IO_FIXED);
650 }
651 
652 static __init void pnpacpi_parse_ext_address_option(struct pnp_dev *dev,
653 						    unsigned int option_flags,
654 						    struct acpi_resource *r)
655 {
656 	struct acpi_resource_extended_address64 *p = &r->data.ext_address64;
657 	unsigned char flags = 0;
658 
659 	if (p->address_length == 0)
660 		return;
661 
662 	if (p->resource_type == ACPI_MEMORY_RANGE) {
663 		if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY)
664 			flags = IORESOURCE_MEM_WRITEABLE;
665 		pnp_register_mem_resource(dev, option_flags, p->minimum,
666 					  p->minimum, 0, p->address_length,
667 					  flags);
668 	} else if (p->resource_type == ACPI_IO_RANGE)
669 		pnp_register_port_resource(dev, option_flags, p->minimum,
670 					   p->minimum, 0, p->address_length,
671 					   IORESOURCE_IO_FIXED);
672 }
673 
674 struct acpipnp_parse_option_s {
675 	struct pnp_dev *dev;
676 	unsigned int option_flags;
677 };
678 
679 static __init acpi_status pnpacpi_option_resource(struct acpi_resource *res,
680 						  void *data)
681 {
682 	int priority;
683 	struct acpipnp_parse_option_s *parse_data = data;
684 	struct pnp_dev *dev = parse_data->dev;
685 	unsigned int option_flags = parse_data->option_flags;
686 
687 	switch (res->type) {
688 	case ACPI_RESOURCE_TYPE_IRQ:
689 		pnpacpi_parse_irq_option(dev, option_flags, &res->data.irq);
690 		break;
691 
692 	case ACPI_RESOURCE_TYPE_DMA:
693 		pnpacpi_parse_dma_option(dev, option_flags, &res->data.dma);
694 		break;
695 
696 	case ACPI_RESOURCE_TYPE_START_DEPENDENT:
697 		switch (res->data.start_dpf.compatibility_priority) {
698 		case ACPI_GOOD_CONFIGURATION:
699 			priority = PNP_RES_PRIORITY_PREFERRED;
700 			break;
701 
702 		case ACPI_ACCEPTABLE_CONFIGURATION:
703 			priority = PNP_RES_PRIORITY_ACCEPTABLE;
704 			break;
705 
706 		case ACPI_SUB_OPTIMAL_CONFIGURATION:
707 			priority = PNP_RES_PRIORITY_FUNCTIONAL;
708 			break;
709 		default:
710 			priority = PNP_RES_PRIORITY_INVALID;
711 			break;
712 		}
713 		parse_data->option_flags = pnp_new_dependent_set(dev, priority);
714 		break;
715 
716 	case ACPI_RESOURCE_TYPE_END_DEPENDENT:
717 		parse_data->option_flags = 0;
718 		break;
719 
720 	case ACPI_RESOURCE_TYPE_IO:
721 		pnpacpi_parse_port_option(dev, option_flags, &res->data.io);
722 		break;
723 
724 	case ACPI_RESOURCE_TYPE_FIXED_IO:
725 		pnpacpi_parse_fixed_port_option(dev, option_flags,
726 					        &res->data.fixed_io);
727 		break;
728 
729 	case ACPI_RESOURCE_TYPE_VENDOR:
730 	case ACPI_RESOURCE_TYPE_END_TAG:
731 		break;
732 
733 	case ACPI_RESOURCE_TYPE_MEMORY24:
734 		pnpacpi_parse_mem24_option(dev, option_flags,
735 					   &res->data.memory24);
736 		break;
737 
738 	case ACPI_RESOURCE_TYPE_MEMORY32:
739 		pnpacpi_parse_mem32_option(dev, option_flags,
740 					   &res->data.memory32);
741 		break;
742 
743 	case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
744 		pnpacpi_parse_fixed_mem32_option(dev, option_flags,
745 						 &res->data.fixed_memory32);
746 		break;
747 
748 	case ACPI_RESOURCE_TYPE_ADDRESS16:
749 	case ACPI_RESOURCE_TYPE_ADDRESS32:
750 	case ACPI_RESOURCE_TYPE_ADDRESS64:
751 		pnpacpi_parse_address_option(dev, option_flags, res);
752 		break;
753 
754 	case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
755 		pnpacpi_parse_ext_address_option(dev, option_flags, res);
756 		break;
757 
758 	case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
759 		pnpacpi_parse_ext_irq_option(dev, option_flags,
760 					     &res->data.extended_irq);
761 		break;
762 
763 	case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
764 		break;
765 
766 	default:
767 		dev_warn(&dev->dev, "unknown resource type %d in _PRS\n",
768 			 res->type);
769 		return AE_ERROR;
770 	}
771 
772 	return AE_OK;
773 }
774 
775 int __init pnpacpi_parse_resource_option_data(struct pnp_dev *dev)
776 {
777 	struct acpi_device *acpi_dev = dev->data;
778 	acpi_handle handle = acpi_dev->handle;
779 	acpi_status status;
780 	struct acpipnp_parse_option_s parse_data;
781 
782 	pnp_dbg(&dev->dev, "parse resource options\n");
783 
784 	parse_data.dev = dev;
785 	parse_data.option_flags = 0;
786 
787 	status = acpi_walk_resources(handle, METHOD_NAME__PRS,
788 				     pnpacpi_option_resource, &parse_data);
789 
790 	if (ACPI_FAILURE(status)) {
791 		if (status != AE_NOT_FOUND)
792 			dev_err(&dev->dev, "can't evaluate _PRS: %d", status);
793 		return -EPERM;
794 	}
795 	return 0;
796 }
797 
798 static int pnpacpi_supported_resource(struct acpi_resource *res)
799 {
800 	switch (res->type) {
801 	case ACPI_RESOURCE_TYPE_IRQ:
802 	case ACPI_RESOURCE_TYPE_DMA:
803 	case ACPI_RESOURCE_TYPE_IO:
804 	case ACPI_RESOURCE_TYPE_FIXED_IO:
805 	case ACPI_RESOURCE_TYPE_MEMORY24:
806 	case ACPI_RESOURCE_TYPE_MEMORY32:
807 	case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
808 	case ACPI_RESOURCE_TYPE_ADDRESS16:
809 	case ACPI_RESOURCE_TYPE_ADDRESS32:
810 	case ACPI_RESOURCE_TYPE_ADDRESS64:
811 	case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
812 	case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
813 		return 1;
814 	}
815 	return 0;
816 }
817 
818 /*
819  * Set resource
820  */
821 static acpi_status pnpacpi_count_resources(struct acpi_resource *res,
822 					   void *data)
823 {
824 	int *res_cnt = data;
825 
826 	if (pnpacpi_supported_resource(res))
827 		(*res_cnt)++;
828 	return AE_OK;
829 }
830 
831 static acpi_status pnpacpi_type_resources(struct acpi_resource *res, void *data)
832 {
833 	struct acpi_resource **resource = data;
834 
835 	if (pnpacpi_supported_resource(res)) {
836 		(*resource)->type = res->type;
837 		(*resource)->length = sizeof(struct acpi_resource);
838 		if (res->type == ACPI_RESOURCE_TYPE_IRQ)
839 			(*resource)->data.irq.descriptor_length =
840 					res->data.irq.descriptor_length;
841 		(*resource)++;
842 	}
843 
844 	return AE_OK;
845 }
846 
847 int pnpacpi_build_resource_template(struct pnp_dev *dev,
848 				    struct acpi_buffer *buffer)
849 {
850 	struct acpi_device *acpi_dev = dev->data;
851 	acpi_handle handle = acpi_dev->handle;
852 	struct acpi_resource *resource;
853 	int res_cnt = 0;
854 	acpi_status status;
855 
856 	status = acpi_walk_resources(handle, METHOD_NAME__CRS,
857 				     pnpacpi_count_resources, &res_cnt);
858 	if (ACPI_FAILURE(status)) {
859 		dev_err(&dev->dev, "can't evaluate _CRS: %d\n", status);
860 		return -EINVAL;
861 	}
862 	if (!res_cnt)
863 		return -EINVAL;
864 	buffer->length = sizeof(struct acpi_resource) * (res_cnt + 1) + 1;
865 	buffer->pointer = kzalloc(buffer->length - 1, GFP_KERNEL);
866 	if (!buffer->pointer)
867 		return -ENOMEM;
868 
869 	resource = (struct acpi_resource *)buffer->pointer;
870 	status = acpi_walk_resources(handle, METHOD_NAME__CRS,
871 				     pnpacpi_type_resources, &resource);
872 	if (ACPI_FAILURE(status)) {
873 		kfree(buffer->pointer);
874 		dev_err(&dev->dev, "can't evaluate _CRS: %d\n", status);
875 		return -EINVAL;
876 	}
877 	/* resource will pointer the end resource now */
878 	resource->type = ACPI_RESOURCE_TYPE_END_TAG;
879 
880 	return 0;
881 }
882 
883 static void pnpacpi_encode_irq(struct pnp_dev *dev,
884 			       struct acpi_resource *resource,
885 			       struct resource *p)
886 {
887 	struct acpi_resource_irq *irq = &resource->data.irq;
888 	int triggering, polarity, shareable;
889 
890 	if (!pnp_resource_enabled(p)) {
891 		irq->interrupt_count = 0;
892 		pnp_dbg(&dev->dev, "  encode irq (%s)\n",
893 			p ? "disabled" : "missing");
894 		return;
895 	}
896 
897 	decode_irq_flags(dev, p->flags, &triggering, &polarity, &shareable);
898 	irq->triggering = triggering;
899 	irq->polarity = polarity;
900 	irq->sharable = shareable;
901 	irq->interrupt_count = 1;
902 	irq->interrupts[0] = p->start;
903 
904 	pnp_dbg(&dev->dev, "  encode irq %d %s %s %s (%d-byte descriptor)\n",
905 		(int) p->start,
906 		triggering == ACPI_LEVEL_SENSITIVE ? "level" : "edge",
907 		polarity == ACPI_ACTIVE_LOW ? "low" : "high",
908 		irq->sharable == ACPI_SHARED ? "shared" : "exclusive",
909 		irq->descriptor_length);
910 }
911 
912 static void pnpacpi_encode_ext_irq(struct pnp_dev *dev,
913 				   struct acpi_resource *resource,
914 				   struct resource *p)
915 {
916 	struct acpi_resource_extended_irq *extended_irq = &resource->data.extended_irq;
917 	int triggering, polarity, shareable;
918 
919 	if (!pnp_resource_enabled(p)) {
920 		extended_irq->interrupt_count = 0;
921 		pnp_dbg(&dev->dev, "  encode extended irq (%s)\n",
922 			p ? "disabled" : "missing");
923 		return;
924 	}
925 
926 	decode_irq_flags(dev, p->flags, &triggering, &polarity, &shareable);
927 	extended_irq->producer_consumer = ACPI_CONSUMER;
928 	extended_irq->triggering = triggering;
929 	extended_irq->polarity = polarity;
930 	extended_irq->sharable = shareable;
931 	extended_irq->interrupt_count = 1;
932 	extended_irq->interrupts[0] = p->start;
933 
934 	pnp_dbg(&dev->dev, "  encode irq %d %s %s %s\n", (int) p->start,
935 		triggering == ACPI_LEVEL_SENSITIVE ? "level" : "edge",
936 		polarity == ACPI_ACTIVE_LOW ? "low" : "high",
937 		extended_irq->sharable == ACPI_SHARED ? "shared" : "exclusive");
938 }
939 
940 static void pnpacpi_encode_dma(struct pnp_dev *dev,
941 			       struct acpi_resource *resource,
942 			       struct resource *p)
943 {
944 	struct acpi_resource_dma *dma = &resource->data.dma;
945 
946 	if (!pnp_resource_enabled(p)) {
947 		dma->channel_count = 0;
948 		pnp_dbg(&dev->dev, "  encode dma (%s)\n",
949 			p ? "disabled" : "missing");
950 		return;
951 	}
952 
953 	/* Note: pnp_assign_dma will copy pnp_dma->flags into p->flags */
954 	switch (p->flags & IORESOURCE_DMA_SPEED_MASK) {
955 	case IORESOURCE_DMA_TYPEA:
956 		dma->type = ACPI_TYPE_A;
957 		break;
958 	case IORESOURCE_DMA_TYPEB:
959 		dma->type = ACPI_TYPE_B;
960 		break;
961 	case IORESOURCE_DMA_TYPEF:
962 		dma->type = ACPI_TYPE_F;
963 		break;
964 	default:
965 		dma->type = ACPI_COMPATIBILITY;
966 	}
967 
968 	switch (p->flags & IORESOURCE_DMA_TYPE_MASK) {
969 	case IORESOURCE_DMA_8BIT:
970 		dma->transfer = ACPI_TRANSFER_8;
971 		break;
972 	case IORESOURCE_DMA_8AND16BIT:
973 		dma->transfer = ACPI_TRANSFER_8_16;
974 		break;
975 	default:
976 		dma->transfer = ACPI_TRANSFER_16;
977 	}
978 
979 	dma->bus_master = !!(p->flags & IORESOURCE_DMA_MASTER);
980 	dma->channel_count = 1;
981 	dma->channels[0] = p->start;
982 
983 	pnp_dbg(&dev->dev, "  encode dma %d "
984 		"type %#x transfer %#x master %d\n",
985 		(int) p->start, dma->type, dma->transfer, dma->bus_master);
986 }
987 
988 static void pnpacpi_encode_io(struct pnp_dev *dev,
989 			      struct acpi_resource *resource,
990 			      struct resource *p)
991 {
992 	struct acpi_resource_io *io = &resource->data.io;
993 
994 	if (pnp_resource_enabled(p)) {
995 		/* Note: pnp_assign_port copies pnp_port->flags into p->flags */
996 		io->io_decode = (p->flags & IORESOURCE_IO_16BIT_ADDR) ?
997 		    ACPI_DECODE_16 : ACPI_DECODE_10;
998 		io->minimum = p->start;
999 		io->maximum = p->end;
1000 		io->alignment = 0;	/* Correct? */
1001 		io->address_length = p->end - p->start + 1;
1002 	} else {
1003 		io->minimum = 0;
1004 		io->address_length = 0;
1005 	}
1006 
1007 	pnp_dbg(&dev->dev, "  encode io %#x-%#x decode %#x\n", io->minimum,
1008 		io->minimum + io->address_length - 1, io->io_decode);
1009 }
1010 
1011 static void pnpacpi_encode_fixed_io(struct pnp_dev *dev,
1012 				    struct acpi_resource *resource,
1013 				    struct resource *p)
1014 {
1015 	struct acpi_resource_fixed_io *fixed_io = &resource->data.fixed_io;
1016 
1017 	if (pnp_resource_enabled(p)) {
1018 		fixed_io->address = p->start;
1019 		fixed_io->address_length = p->end - p->start + 1;
1020 	} else {
1021 		fixed_io->address = 0;
1022 		fixed_io->address_length = 0;
1023 	}
1024 
1025 	pnp_dbg(&dev->dev, "  encode fixed_io %#x-%#x\n", fixed_io->address,
1026 		fixed_io->address + fixed_io->address_length - 1);
1027 }
1028 
1029 static void pnpacpi_encode_mem24(struct pnp_dev *dev,
1030 				 struct acpi_resource *resource,
1031 				 struct resource *p)
1032 {
1033 	struct acpi_resource_memory24 *memory24 = &resource->data.memory24;
1034 
1035 	if (pnp_resource_enabled(p)) {
1036 		/* Note: pnp_assign_mem copies pnp_mem->flags into p->flags */
1037 		memory24->write_protect = p->flags & IORESOURCE_MEM_WRITEABLE ?
1038 		    ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
1039 		memory24->minimum = p->start;
1040 		memory24->maximum = p->end;
1041 		memory24->alignment = 0;
1042 		memory24->address_length = p->end - p->start + 1;
1043 	} else {
1044 		memory24->minimum = 0;
1045 		memory24->address_length = 0;
1046 	}
1047 
1048 	pnp_dbg(&dev->dev, "  encode mem24 %#x-%#x write_protect %#x\n",
1049 		memory24->minimum,
1050 		memory24->minimum + memory24->address_length - 1,
1051 		memory24->write_protect);
1052 }
1053 
1054 static void pnpacpi_encode_mem32(struct pnp_dev *dev,
1055 				 struct acpi_resource *resource,
1056 				 struct resource *p)
1057 {
1058 	struct acpi_resource_memory32 *memory32 = &resource->data.memory32;
1059 
1060 	if (pnp_resource_enabled(p)) {
1061 		memory32->write_protect = p->flags & IORESOURCE_MEM_WRITEABLE ?
1062 		    ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
1063 		memory32->minimum = p->start;
1064 		memory32->maximum = p->end;
1065 		memory32->alignment = 0;
1066 		memory32->address_length = p->end - p->start + 1;
1067 	} else {
1068 		memory32->minimum = 0;
1069 		memory32->alignment = 0;
1070 	}
1071 
1072 	pnp_dbg(&dev->dev, "  encode mem32 %#x-%#x write_protect %#x\n",
1073 		memory32->minimum,
1074 		memory32->minimum + memory32->address_length - 1,
1075 		memory32->write_protect);
1076 }
1077 
1078 static void pnpacpi_encode_fixed_mem32(struct pnp_dev *dev,
1079 				       struct acpi_resource *resource,
1080 				       struct resource *p)
1081 {
1082 	struct acpi_resource_fixed_memory32 *fixed_memory32 = &resource->data.fixed_memory32;
1083 
1084 	if (pnp_resource_enabled(p)) {
1085 		fixed_memory32->write_protect =
1086 		    p->flags & IORESOURCE_MEM_WRITEABLE ?
1087 		    ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
1088 		fixed_memory32->address = p->start;
1089 		fixed_memory32->address_length = p->end - p->start + 1;
1090 	} else {
1091 		fixed_memory32->address = 0;
1092 		fixed_memory32->address_length = 0;
1093 	}
1094 
1095 	pnp_dbg(&dev->dev, "  encode fixed_mem32 %#x-%#x write_protect %#x\n",
1096 		fixed_memory32->address,
1097 		fixed_memory32->address + fixed_memory32->address_length - 1,
1098 		fixed_memory32->write_protect);
1099 }
1100 
1101 int pnpacpi_encode_resources(struct pnp_dev *dev, struct acpi_buffer *buffer)
1102 {
1103 	int i = 0;
1104 	/* pnpacpi_build_resource_template allocates extra mem */
1105 	int res_cnt = (buffer->length - 1) / sizeof(struct acpi_resource) - 1;
1106 	struct acpi_resource *resource = buffer->pointer;
1107 	int port = 0, irq = 0, dma = 0, mem = 0;
1108 
1109 	pnp_dbg(&dev->dev, "encode %d resources\n", res_cnt);
1110 	while (i < res_cnt) {
1111 		switch (resource->type) {
1112 		case ACPI_RESOURCE_TYPE_IRQ:
1113 			pnpacpi_encode_irq(dev, resource,
1114 			       pnp_get_resource(dev, IORESOURCE_IRQ, irq));
1115 			irq++;
1116 			break;
1117 
1118 		case ACPI_RESOURCE_TYPE_DMA:
1119 			pnpacpi_encode_dma(dev, resource,
1120 				pnp_get_resource(dev, IORESOURCE_DMA, dma));
1121 			dma++;
1122 			break;
1123 		case ACPI_RESOURCE_TYPE_IO:
1124 			pnpacpi_encode_io(dev, resource,
1125 				pnp_get_resource(dev, IORESOURCE_IO, port));
1126 			port++;
1127 			break;
1128 		case ACPI_RESOURCE_TYPE_FIXED_IO:
1129 			pnpacpi_encode_fixed_io(dev, resource,
1130 				pnp_get_resource(dev, IORESOURCE_IO, port));
1131 			port++;
1132 			break;
1133 		case ACPI_RESOURCE_TYPE_MEMORY24:
1134 			pnpacpi_encode_mem24(dev, resource,
1135 				pnp_get_resource(dev, IORESOURCE_MEM, mem));
1136 			mem++;
1137 			break;
1138 		case ACPI_RESOURCE_TYPE_MEMORY32:
1139 			pnpacpi_encode_mem32(dev, resource,
1140 				pnp_get_resource(dev, IORESOURCE_MEM, mem));
1141 			mem++;
1142 			break;
1143 		case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
1144 			pnpacpi_encode_fixed_mem32(dev, resource,
1145 				pnp_get_resource(dev, IORESOURCE_MEM, mem));
1146 			mem++;
1147 			break;
1148 		case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
1149 			pnpacpi_encode_ext_irq(dev, resource,
1150 				pnp_get_resource(dev, IORESOURCE_IRQ, irq));
1151 			irq++;
1152 			break;
1153 		case ACPI_RESOURCE_TYPE_START_DEPENDENT:
1154 		case ACPI_RESOURCE_TYPE_END_DEPENDENT:
1155 		case ACPI_RESOURCE_TYPE_VENDOR:
1156 		case ACPI_RESOURCE_TYPE_END_TAG:
1157 		case ACPI_RESOURCE_TYPE_ADDRESS16:
1158 		case ACPI_RESOURCE_TYPE_ADDRESS32:
1159 		case ACPI_RESOURCE_TYPE_ADDRESS64:
1160 		case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
1161 		case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
1162 		default:	/* other type */
1163 			dev_warn(&dev->dev, "can't encode unknown resource "
1164 				 "type %d\n", resource->type);
1165 			return -EINVAL;
1166 		}
1167 		resource++;
1168 		i++;
1169 	}
1170 	return 0;
1171 }
1172