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aufs: policies for multiple writable branches, from aufs2.2-3.0
[zen-stable.git] / drivers / pnp / pnpacpi / rsparser.c
blob5be4a392a3aea39b0205baabad87f3535524c5e6
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 <linux/slab.h>
28 #include "../base.h"
29 #include "pnpacpi.h"
30
31 #ifdef CONFIG_IA64
32 #define valid_IRQ(i) (1)
33 #else
34 #define valid_IRQ(i) (((i) != 0) && ((i) != 2))
35 #endif
36
37 /*
38 * Allocated Resources
39 */
40 static int irq_flags(int triggering, int polarity, int shareable)
41 {
42 int flags;
43
44 if (triggering == ACPI_LEVEL_SENSITIVE) {
45 if (polarity == ACPI_ACTIVE_LOW)
46 flags = IORESOURCE_IRQ_LOWLEVEL;
47 else
48 flags = IORESOURCE_IRQ_HIGHLEVEL;
49 } else {
50 if (polarity == ACPI_ACTIVE_LOW)
51 flags = IORESOURCE_IRQ_LOWEDGE;
52 else
53 flags = IORESOURCE_IRQ_HIGHEDGE;
54 }
55
56 if (shareable == ACPI_SHARED)
57 flags |= IORESOURCE_IRQ_SHAREABLE;
58
59 return flags;
60 }
61
62 static void decode_irq_flags(struct pnp_dev *dev, int flags, int *triggering,
63 int *polarity, int *shareable)
64 {
65 switch (flags & (IORESOURCE_IRQ_LOWLEVEL | IORESOURCE_IRQ_HIGHLEVEL |
66 IORESOURCE_IRQ_LOWEDGE | IORESOURCE_IRQ_HIGHEDGE)) {
67 case IORESOURCE_IRQ_LOWLEVEL:
68 *triggering = ACPI_LEVEL_SENSITIVE;
69 *polarity = ACPI_ACTIVE_LOW;
70 break;
71 case IORESOURCE_IRQ_HIGHLEVEL:
72 *triggering = ACPI_LEVEL_SENSITIVE;
73 *polarity = ACPI_ACTIVE_HIGH;
74 break;
75 case IORESOURCE_IRQ_LOWEDGE:
76 *triggering = ACPI_EDGE_SENSITIVE;
77 *polarity = ACPI_ACTIVE_LOW;
78 break;
79 case IORESOURCE_IRQ_HIGHEDGE:
80 *triggering = ACPI_EDGE_SENSITIVE;
81 *polarity = ACPI_ACTIVE_HIGH;
82 break;
83 default:
84 dev_err(&dev->dev, "can't encode invalid IRQ mode %#x\n",
85 flags);
86 *triggering = ACPI_EDGE_SENSITIVE;
87 *polarity = ACPI_ACTIVE_HIGH;
88 break;
89 }
90
91 if (flags & IORESOURCE_IRQ_SHAREABLE)
92 *shareable = ACPI_SHARED;
93 else
94 *shareable = ACPI_EXCLUSIVE;
95 }
96
97 static void pnpacpi_parse_allocated_irqresource(struct pnp_dev *dev,
98 u32 gsi, int triggering,
99 int polarity, int shareable)
100 {
101 int irq, flags;
102 int p, t;
103
104 if (!valid_IRQ(gsi)) {
105 pnp_add_irq_resource(dev, gsi, IORESOURCE_DISABLED);
106 return;
107 }
108
109 /*
110 * in IO-APIC mode, use overrided attribute. Two reasons:
111 * 1. BIOS bug in DSDT
112 * 2. BIOS uses IO-APIC mode Interrupt Source Override
113 */
114 if (!acpi_get_override_irq(gsi, &t, &p)) {
115 t = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
116 p = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
117
118 if (triggering != t || polarity != p) {
119 dev_warn(&dev->dev, "IRQ %d override to %s, %s\n",
120 gsi, t ? "edge":"level", p ? "low":"high");
121 triggering = t;
122 polarity = p;
123 }
124 }
125
126 flags = irq_flags(triggering, polarity, shareable);
127 irq = acpi_register_gsi(&dev->dev, gsi, triggering, polarity);
128 if (irq >= 0)
129 pcibios_penalize_isa_irq(irq, 1);
130 else
131 flags |= IORESOURCE_DISABLED;
132
133 pnp_add_irq_resource(dev, irq, flags);
134 }
135
136 static int dma_flags(struct pnp_dev *dev, int type, int bus_master,
137 int transfer)
138 {
139 int flags = 0;
140
141 if (bus_master)
142 flags |= IORESOURCE_DMA_MASTER;
143 switch (type) {
144 case ACPI_COMPATIBILITY:
145 flags |= IORESOURCE_DMA_COMPATIBLE;
146 break;
147 case ACPI_TYPE_A:
148 flags |= IORESOURCE_DMA_TYPEA;
149 break;
150 case ACPI_TYPE_B:
151 flags |= IORESOURCE_DMA_TYPEB;
152 break;
153 case ACPI_TYPE_F:
154 flags |= IORESOURCE_DMA_TYPEF;
155 break;
156 default:
157 /* Set a default value ? */
158 flags |= IORESOURCE_DMA_COMPATIBLE;
159 dev_err(&dev->dev, "invalid DMA type %d\n", type);
160 }
161 switch (transfer) {
162 case ACPI_TRANSFER_8:
163 flags |= IORESOURCE_DMA_8BIT;
164 break;
165 case ACPI_TRANSFER_8_16:
166 flags |= IORESOURCE_DMA_8AND16BIT;
167 break;
168 case ACPI_TRANSFER_16:
169 flags |= IORESOURCE_DMA_16BIT;
170 break;
171 default:
172 /* Set a default value ? */
173 flags |= IORESOURCE_DMA_8AND16BIT;
174 dev_err(&dev->dev, "invalid DMA transfer type %d\n", transfer);
175 }
176
177 return flags;
178 }
179
180 static void pnpacpi_parse_allocated_ioresource(struct pnp_dev *dev, u64 start,
181 u64 len, int io_decode,
182 int window)
183 {
184 int flags = 0;
185 u64 end = start + len - 1;
186
187 if (io_decode == ACPI_DECODE_16)
188 flags |= IORESOURCE_IO_16BIT_ADDR;
189 if (len == 0 || end >= 0x10003)
190 flags |= IORESOURCE_DISABLED;
191 if (window)
192 flags |= IORESOURCE_WINDOW;
193
194 pnp_add_io_resource(dev, start, end, flags);
195 }
196
197 /*
198 * Device CSRs that do not appear in PCI config space should be described
199 * via ACPI. This would normally be done with Address Space Descriptors
200 * marked as "consumer-only," but old versions of Windows and Linux ignore
201 * the producer/consumer flag, so HP invented a vendor-defined resource to
202 * describe the location and size of CSR space.
203 */
204 static struct acpi_vendor_uuid hp_ccsr_uuid = {
205 .subtype = 2,
206 .data = { 0xf9, 0xad, 0xe9, 0x69, 0x4f, 0x92, 0x5f, 0xab, 0xf6, 0x4a,
207 0x24, 0xd2, 0x01, 0x37, 0x0e, 0xad },
208 };
209
210 static int vendor_resource_matches(struct pnp_dev *dev,
211 struct acpi_resource_vendor_typed *vendor,
212 struct acpi_vendor_uuid *match,
213 int expected_len)
214 {
215 int uuid_len = sizeof(vendor->uuid);
216 u8 uuid_subtype = vendor->uuid_subtype;
217 u8 *uuid = vendor->uuid;
218 int actual_len;
219
220 /* byte_length includes uuid_subtype and uuid */
221 actual_len = vendor->byte_length - uuid_len - 1;
222
223 if (uuid_subtype == match->subtype &&
224 uuid_len == sizeof(match->data) &&
225 memcmp(uuid, match->data, uuid_len) == 0) {
226 if (expected_len && expected_len != actual_len) {
227 dev_err(&dev->dev, "wrong vendor descriptor size; "
228 "expected %d, found %d bytes\n",
229 expected_len, actual_len);
230 return 0;
231 }
232
233 return 1;
234 }
235
236 return 0;
237 }
238
239 static void pnpacpi_parse_allocated_vendor(struct pnp_dev *dev,
240 struct acpi_resource_vendor_typed *vendor)
241 {
242 if (vendor_resource_matches(dev, vendor, &hp_ccsr_uuid, 16)) {
243 u64 start, length;
244
245 memcpy(&start, vendor->byte_data, sizeof(start));
246 memcpy(&length, vendor->byte_data + 8, sizeof(length));
247
248 pnp_add_mem_resource(dev, start, start + length - 1, 0);
249 }
250 }
251
252 static void pnpacpi_parse_allocated_memresource(struct pnp_dev *dev,
253 u64 start, u64 len,
254 int write_protect, int window)
255 {
256 int flags = 0;
257 u64 end = start + len - 1;
258
259 if (len == 0)
260 flags |= IORESOURCE_DISABLED;
261 if (write_protect == ACPI_READ_WRITE_MEMORY)
262 flags |= IORESOURCE_MEM_WRITEABLE;
263 if (window)
264 flags |= IORESOURCE_WINDOW;
265
266 pnp_add_mem_resource(dev, start, end, flags);
267 }
268
269 static void pnpacpi_parse_allocated_busresource(struct pnp_dev *dev,
270 u64 start, u64 len)
271 {
272 u64 end = start + len - 1;
273
274 pnp_add_bus_resource(dev, start, end);
275 }
276
277 static void pnpacpi_parse_allocated_address_space(struct pnp_dev *dev,
278 struct acpi_resource *res)
279 {
280 struct acpi_resource_address64 addr, *p = &addr;
281 acpi_status status;
282 int window;
283 u64 len;
284
285 status = acpi_resource_to_address64(res, p);
286 if (!ACPI_SUCCESS(status)) {
287 dev_warn(&dev->dev, "failed to convert resource type %d\n",
288 res->type);
289 return;
290 }
291
292 /* Windows apparently computes length rather than using _LEN */
293 len = p->maximum - p->minimum + 1;
294 window = (p->producer_consumer == ACPI_PRODUCER) ? 1 : 0;
295
296 if (p->resource_type == ACPI_MEMORY_RANGE)
297 pnpacpi_parse_allocated_memresource(dev, p->minimum, len,
298 p->info.mem.write_protect, window);
299 else if (p->resource_type == ACPI_IO_RANGE)
300 pnpacpi_parse_allocated_ioresource(dev, p->minimum, len,
301 p->granularity == 0xfff ? ACPI_DECODE_10 :
302 ACPI_DECODE_16, window);
303 else if (p->resource_type == ACPI_BUS_NUMBER_RANGE)
304 pnpacpi_parse_allocated_busresource(dev, p->minimum, len);
305 }
306
307 static void pnpacpi_parse_allocated_ext_address_space(struct pnp_dev *dev,
308 struct acpi_resource *res)
309 {
310 struct acpi_resource_extended_address64 *p = &res->data.ext_address64;
311 int window;
312 u64 len;
313
314 /* Windows apparently computes length rather than using _LEN */
315 len = p->maximum - p->minimum + 1;
316 window = (p->producer_consumer == ACPI_PRODUCER) ? 1 : 0;
317
318 if (p->resource_type == ACPI_MEMORY_RANGE)
319 pnpacpi_parse_allocated_memresource(dev, p->minimum, len,
320 p->info.mem.write_protect, window);
321 else if (p->resource_type == ACPI_IO_RANGE)
322 pnpacpi_parse_allocated_ioresource(dev, p->minimum, len,
323 p->granularity == 0xfff ? ACPI_DECODE_10 :
324 ACPI_DECODE_16, window);
325 else if (p->resource_type == ACPI_BUS_NUMBER_RANGE)
326 pnpacpi_parse_allocated_busresource(dev, p->minimum, len);
327 }
328
329 static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
330 void *data)
331 {
332 struct pnp_dev *dev = data;
333 struct acpi_resource_irq *irq;
334 struct acpi_resource_dma *dma;
335 struct acpi_resource_io *io;
336 struct acpi_resource_fixed_io *fixed_io;
337 struct acpi_resource_vendor_typed *vendor_typed;
338 struct acpi_resource_memory24 *memory24;
339 struct acpi_resource_memory32 *memory32;
340 struct acpi_resource_fixed_memory32 *fixed_memory32;
341 struct acpi_resource_extended_irq *extended_irq;
342 int i, flags;
343
344 switch (res->type) {
345 case ACPI_RESOURCE_TYPE_IRQ:
346 /*
347 * Per spec, only one interrupt per descriptor is allowed in
348 * _CRS, but some firmware violates this, so parse them all.
349 */
350 irq = &res->data.irq;
351 if (irq->interrupt_count == 0)
352 pnp_add_irq_resource(dev, 0, IORESOURCE_DISABLED);
353 else {
354 for (i = 0; i < irq->interrupt_count; i++) {
355 pnpacpi_parse_allocated_irqresource(dev,
356 irq->interrupts[i],
357 irq->triggering,
358 irq->polarity,
359 irq->sharable);
360 }
361
362 /*
363 * The IRQ encoder puts a single interrupt in each
364 * descriptor, so if a _CRS descriptor has more than
365 * one interrupt, we won't be able to re-encode it.
366 */
367 if (pnp_can_write(dev) && irq->interrupt_count > 1) {
368 dev_warn(&dev->dev, "multiple interrupts in "
369 "_CRS descriptor; configuration can't "
370 "be changed\n");
371 dev->capabilities &= ~PNP_WRITE;
372 }
373 }
374 break;
375
376 case ACPI_RESOURCE_TYPE_DMA:
377 dma = &res->data.dma;
378 if (dma->channel_count > 0 && dma->channels[0] != (u8) -1)
379 flags = dma_flags(dev, dma->type, dma->bus_master,
380 dma->transfer);
381 else
382 flags = IORESOURCE_DISABLED;
383 pnp_add_dma_resource(dev, dma->channels[0], flags);
384 break;
385
386 case ACPI_RESOURCE_TYPE_IO:
387 io = &res->data.io;
388 pnpacpi_parse_allocated_ioresource(dev,
389 io->minimum,
390 io->address_length,
391 io->io_decode, 0);
392 break;
393
394 case ACPI_RESOURCE_TYPE_START_DEPENDENT:
395 case ACPI_RESOURCE_TYPE_END_DEPENDENT:
396 break;
397
398 case ACPI_RESOURCE_TYPE_FIXED_IO:
399 fixed_io = &res->data.fixed_io;
400 pnpacpi_parse_allocated_ioresource(dev,
401 fixed_io->address,
402 fixed_io->address_length,
403 ACPI_DECODE_10, 0);
404 break;
405
406 case ACPI_RESOURCE_TYPE_VENDOR:
407 vendor_typed = &res->data.vendor_typed;
408 pnpacpi_parse_allocated_vendor(dev, vendor_typed);
409 break;
410
411 case ACPI_RESOURCE_TYPE_END_TAG:
412 break;
413
414 case ACPI_RESOURCE_TYPE_MEMORY24:
415 memory24 = &res->data.memory24;
416 pnpacpi_parse_allocated_memresource(dev,
417 memory24->minimum,
418 memory24->address_length,
419 memory24->write_protect, 0);
420 break;
421 case ACPI_RESOURCE_TYPE_MEMORY32:
422 memory32 = &res->data.memory32;
423 pnpacpi_parse_allocated_memresource(dev,
424 memory32->minimum,
425 memory32->address_length,
426 memory32->write_protect, 0);
427 break;
428 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
429 fixed_memory32 = &res->data.fixed_memory32;
430 pnpacpi_parse_allocated_memresource(dev,
431 fixed_memory32->address,
432 fixed_memory32->address_length,
433 fixed_memory32->write_protect, 0);
434 break;
435 case ACPI_RESOURCE_TYPE_ADDRESS16:
436 case ACPI_RESOURCE_TYPE_ADDRESS32:
437 case ACPI_RESOURCE_TYPE_ADDRESS64:
438 pnpacpi_parse_allocated_address_space(dev, res);
439 break;
440
441 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
442 pnpacpi_parse_allocated_ext_address_space(dev, res);
443 break;
444
445 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
446 extended_irq = &res->data.extended_irq;
447
448 if (extended_irq->interrupt_count == 0)
449 pnp_add_irq_resource(dev, 0, IORESOURCE_DISABLED);
450 else {
451 for (i = 0; i < extended_irq->interrupt_count; i++) {
452 pnpacpi_parse_allocated_irqresource(dev,
453 extended_irq->interrupts[i],
454 extended_irq->triggering,
455 extended_irq->polarity,
456 extended_irq->sharable);
457 }
458
459 /*
460 * The IRQ encoder puts a single interrupt in each
461 * descriptor, so if a _CRS descriptor has more than
462 * one interrupt, we won't be able to re-encode it.
463 */
464 if (pnp_can_write(dev) &&
465 extended_irq->interrupt_count > 1) {
466 dev_warn(&dev->dev, "multiple interrupts in "
467 "_CRS descriptor; configuration can't "
468 "be changed\n");
469 dev->capabilities &= ~PNP_WRITE;
470 }
471 }
472 break;
473
474 case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
475 break;
476
477 default:
478 dev_warn(&dev->dev, "unknown resource type %d in _CRS\n",
479 res->type);
480 return AE_ERROR;
481 }
482
483 return AE_OK;
484 }
485
486 int pnpacpi_parse_allocated_resource(struct pnp_dev *dev)
487 {
488 struct acpi_device *acpi_dev = dev->data;
489 acpi_handle handle = acpi_dev->handle;
490 acpi_status status;
491
492 pnp_dbg(&dev->dev, "parse allocated resources\n");
493
494 pnp_init_resources(dev);
495
496 status = acpi_walk_resources(handle, METHOD_NAME__CRS,
497 pnpacpi_allocated_resource, dev);
498
499 if (ACPI_FAILURE(status)) {
500 if (status != AE_NOT_FOUND)
501 dev_err(&dev->dev, "can't evaluate _CRS: %d", status);
502 return -EPERM;
503 }
504 return 0;
505 }
506
507 static __init void pnpacpi_parse_dma_option(struct pnp_dev *dev,
508 unsigned int option_flags,
509 struct acpi_resource_dma *p)
510 {
511 int i;
512 unsigned char map = 0, flags;
513
514 for (i = 0; i < p->channel_count; i++)
515 map |= 1 << p->channels[i];
516
517 flags = dma_flags(dev, p->type, p->bus_master, p->transfer);
518 pnp_register_dma_resource(dev, option_flags, map, flags);
519 }
520
521 static __init void pnpacpi_parse_irq_option(struct pnp_dev *dev,
522 unsigned int option_flags,
523 struct acpi_resource_irq *p)
524 {
525 int i;
526 pnp_irq_mask_t map;
527 unsigned char flags;
528
529 bitmap_zero(map.bits, PNP_IRQ_NR);
530 for (i = 0; i < p->interrupt_count; i++)
531 if (p->interrupts[i])
532 __set_bit(p->interrupts[i], map.bits);
533
534 flags = irq_flags(p->triggering, p->polarity, p->sharable);
535 pnp_register_irq_resource(dev, option_flags, &map, flags);
536 }
537
538 static __init void pnpacpi_parse_ext_irq_option(struct pnp_dev *dev,
539 unsigned int option_flags,
540 struct acpi_resource_extended_irq *p)
541 {
542 int i;
543 pnp_irq_mask_t map;
544 unsigned char flags;
545
546 bitmap_zero(map.bits, PNP_IRQ_NR);
547 for (i = 0; i < p->interrupt_count; i++) {
548 if (p->interrupts[i]) {
549 if (p->interrupts[i] < PNP_IRQ_NR)
550 __set_bit(p->interrupts[i], map.bits);
551 else
552 dev_err(&dev->dev, "ignoring IRQ %d option "
553 "(too large for %d entry bitmap)\n",
554 p->interrupts[i], PNP_IRQ_NR);
555 }
556 }
557
558 flags = irq_flags(p->triggering, p->polarity, p->sharable);
559 pnp_register_irq_resource(dev, option_flags, &map, flags);
560 }
561
562 static __init void pnpacpi_parse_port_option(struct pnp_dev *dev,
563 unsigned int option_flags,
564 struct acpi_resource_io *io)
565 {
566 unsigned char flags = 0;
567
568 if (io->io_decode == ACPI_DECODE_16)
569 flags = IORESOURCE_IO_16BIT_ADDR;
570 pnp_register_port_resource(dev, option_flags, io->minimum, io->maximum,
571 io->alignment, io->address_length, flags);
572 }
573
574 static __init void pnpacpi_parse_fixed_port_option(struct pnp_dev *dev,
575 unsigned int option_flags,
576 struct acpi_resource_fixed_io *io)
577 {
578 pnp_register_port_resource(dev, option_flags, io->address, io->address,
579 0, io->address_length, IORESOURCE_IO_FIXED);
580 }
581
582 static __init void pnpacpi_parse_mem24_option(struct pnp_dev *dev,
583 unsigned int option_flags,
584 struct acpi_resource_memory24 *p)
585 {
586 unsigned char flags = 0;
587
588 if (p->write_protect == ACPI_READ_WRITE_MEMORY)
589 flags = IORESOURCE_MEM_WRITEABLE;
590 pnp_register_mem_resource(dev, option_flags, p->minimum, p->maximum,
591 p->alignment, p->address_length, flags);
592 }
593
594 static __init void pnpacpi_parse_mem32_option(struct pnp_dev *dev,
595 unsigned int option_flags,
596 struct acpi_resource_memory32 *p)
597 {
598 unsigned char flags = 0;
599
600 if (p->write_protect == ACPI_READ_WRITE_MEMORY)
601 flags = IORESOURCE_MEM_WRITEABLE;
602 pnp_register_mem_resource(dev, option_flags, p->minimum, p->maximum,
603 p->alignment, p->address_length, flags);
604 }
605
606 static __init void pnpacpi_parse_fixed_mem32_option(struct pnp_dev *dev,
607 unsigned int option_flags,
608 struct acpi_resource_fixed_memory32 *p)
609 {
610 unsigned char flags = 0;
611
612 if (p->write_protect == ACPI_READ_WRITE_MEMORY)
613 flags = IORESOURCE_MEM_WRITEABLE;
614 pnp_register_mem_resource(dev, option_flags, p->address, p->address,
615 0, p->address_length, flags);
616 }
617
618 static __init void pnpacpi_parse_address_option(struct pnp_dev *dev,
619 unsigned int option_flags,
620 struct acpi_resource *r)
621 {
622 struct acpi_resource_address64 addr, *p = &addr;
623 acpi_status status;
624 unsigned char flags = 0;
625
626 status = acpi_resource_to_address64(r, p);
627 if (ACPI_FAILURE(status)) {
628 dev_warn(&dev->dev, "can't convert resource type %d\n",
629 r->type);
630 return;
631 }
632
633 if (p->resource_type == ACPI_MEMORY_RANGE) {
634 if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY)
635 flags = IORESOURCE_MEM_WRITEABLE;
636 pnp_register_mem_resource(dev, option_flags, p->minimum,
637 p->minimum, 0, p->address_length,
638 flags);
639 } else if (p->resource_type == ACPI_IO_RANGE)
640 pnp_register_port_resource(dev, option_flags, p->minimum,
641 p->minimum, 0, p->address_length,
642 IORESOURCE_IO_FIXED);
643 }
644
645 static __init void pnpacpi_parse_ext_address_option(struct pnp_dev *dev,
646 unsigned int option_flags,
647 struct acpi_resource *r)
648 {
649 struct acpi_resource_extended_address64 *p = &r->data.ext_address64;
650 unsigned char flags = 0;
651
652 if (p->resource_type == ACPI_MEMORY_RANGE) {
653 if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY)
654 flags = IORESOURCE_MEM_WRITEABLE;
655 pnp_register_mem_resource(dev, option_flags, p->minimum,
656 p->minimum, 0, p->address_length,
657 flags);
658 } else if (p->resource_type == ACPI_IO_RANGE)
659 pnp_register_port_resource(dev, option_flags, p->minimum,
660 p->minimum, 0, p->address_length,
661 IORESOURCE_IO_FIXED);
662 }
663
664 struct acpipnp_parse_option_s {
665 struct pnp_dev *dev;
666 unsigned int option_flags;
667 };
668
669 static __init acpi_status pnpacpi_option_resource(struct acpi_resource *res,
670 void *data)
671 {
672 int priority;
673 struct acpipnp_parse_option_s *parse_data = data;
674 struct pnp_dev *dev = parse_data->dev;
675 unsigned int option_flags = parse_data->option_flags;
676
677 switch (res->type) {
678 case ACPI_RESOURCE_TYPE_IRQ:
679 pnpacpi_parse_irq_option(dev, option_flags, &res->data.irq);
680 break;
681
682 case ACPI_RESOURCE_TYPE_DMA:
683 pnpacpi_parse_dma_option(dev, option_flags, &res->data.dma);
684 break;
685
686 case ACPI_RESOURCE_TYPE_START_DEPENDENT:
687 switch (res->data.start_dpf.compatibility_priority) {
688 case ACPI_GOOD_CONFIGURATION:
689 priority = PNP_RES_PRIORITY_PREFERRED;
690 break;
691
692 case ACPI_ACCEPTABLE_CONFIGURATION:
693 priority = PNP_RES_PRIORITY_ACCEPTABLE;
694 break;
695
696 case ACPI_SUB_OPTIMAL_CONFIGURATION:
697 priority = PNP_RES_PRIORITY_FUNCTIONAL;
698 break;
699 default:
700 priority = PNP_RES_PRIORITY_INVALID;
701 break;
702 }
703 parse_data->option_flags = pnp_new_dependent_set(dev, priority);
704 break;
705
706 case ACPI_RESOURCE_TYPE_END_DEPENDENT:
707 parse_data->option_flags = 0;
708 break;
709
710 case ACPI_RESOURCE_TYPE_IO:
711 pnpacpi_parse_port_option(dev, option_flags, &res->data.io);
712 break;
713
714 case ACPI_RESOURCE_TYPE_FIXED_IO:
715 pnpacpi_parse_fixed_port_option(dev, option_flags,
716 &res->data.fixed_io);
717 break;
718
719 case ACPI_RESOURCE_TYPE_VENDOR:
720 case ACPI_RESOURCE_TYPE_END_TAG:
721 break;
722
723 case ACPI_RESOURCE_TYPE_MEMORY24:
724 pnpacpi_parse_mem24_option(dev, option_flags,
725 &res->data.memory24);
726 break;
727
728 case ACPI_RESOURCE_TYPE_MEMORY32:
729 pnpacpi_parse_mem32_option(dev, option_flags,
730 &res->data.memory32);
731 break;
732
733 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
734 pnpacpi_parse_fixed_mem32_option(dev, option_flags,
735 &res->data.fixed_memory32);
736 break;
737
738 case ACPI_RESOURCE_TYPE_ADDRESS16:
739 case ACPI_RESOURCE_TYPE_ADDRESS32:
740 case ACPI_RESOURCE_TYPE_ADDRESS64:
741 pnpacpi_parse_address_option(dev, option_flags, res);
742 break;
743
744 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
745 pnpacpi_parse_ext_address_option(dev, option_flags, res);
746 break;
747
748 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
749 pnpacpi_parse_ext_irq_option(dev, option_flags,
750 &res->data.extended_irq);
751 break;
752
753 case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
754 break;
755
756 default:
757 dev_warn(&dev->dev, "unknown resource type %d in _PRS\n",
758 res->type);
759 return AE_ERROR;
760 }
761
762 return AE_OK;
763 }
764
765 int __init pnpacpi_parse_resource_option_data(struct pnp_dev *dev)
766 {
767 struct acpi_device *acpi_dev = dev->data;
768 acpi_handle handle = acpi_dev->handle;
769 acpi_status status;
770 struct acpipnp_parse_option_s parse_data;
771
772 pnp_dbg(&dev->dev, "parse resource options\n");
773
774 parse_data.dev = dev;
775 parse_data.option_flags = 0;
776
777 status = acpi_walk_resources(handle, METHOD_NAME__PRS,
778 pnpacpi_option_resource, &parse_data);
779
780 if (ACPI_FAILURE(status)) {
781 if (status != AE_NOT_FOUND)
782 dev_err(&dev->dev, "can't evaluate _PRS: %d", status);
783 return -EPERM;
784 }
785 return 0;
786 }
787
788 static int pnpacpi_supported_resource(struct acpi_resource *res)
789 {
790 switch (res->type) {
791 case ACPI_RESOURCE_TYPE_IRQ:
792 case ACPI_RESOURCE_TYPE_DMA:
793 case ACPI_RESOURCE_TYPE_IO:
794 case ACPI_RESOURCE_TYPE_FIXED_IO:
795 case ACPI_RESOURCE_TYPE_MEMORY24:
796 case ACPI_RESOURCE_TYPE_MEMORY32:
797 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
798 case ACPI_RESOURCE_TYPE_ADDRESS16:
799 case ACPI_RESOURCE_TYPE_ADDRESS32:
800 case ACPI_RESOURCE_TYPE_ADDRESS64:
801 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
802 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
803 return 1;
804 }
805 return 0;
806 }
807
808 /*
809 * Set resource
810 */
811 static acpi_status pnpacpi_count_resources(struct acpi_resource *res,
812 void *data)
813 {
814 int *res_cnt = data;
815
816 if (pnpacpi_supported_resource(res))
817 (*res_cnt)++;
818 return AE_OK;
819 }
820
821 static acpi_status pnpacpi_type_resources(struct acpi_resource *res, void *data)
822 {
823 struct acpi_resource **resource = data;
824
825 if (pnpacpi_supported_resource(res)) {
826 (*resource)->type = res->type;
827 (*resource)->length = sizeof(struct acpi_resource);
828 if (res->type == ACPI_RESOURCE_TYPE_IRQ)
829 (*resource)->data.irq.descriptor_length =
830 res->data.irq.descriptor_length;
831 (*resource)++;
832 }
833
834 return AE_OK;
835 }
836
837 int pnpacpi_build_resource_template(struct pnp_dev *dev,
838 struct acpi_buffer *buffer)
839 {
840 struct acpi_device *acpi_dev = dev->data;
841 acpi_handle handle = acpi_dev->handle;
842 struct acpi_resource *resource;
843 int res_cnt = 0;
844 acpi_status status;
845
846 status = acpi_walk_resources(handle, METHOD_NAME__CRS,
847 pnpacpi_count_resources, &res_cnt);
848 if (ACPI_FAILURE(status)) {
849 dev_err(&dev->dev, "can't evaluate _CRS: %d\n", status);
850 return -EINVAL;
851 }
852 if (!res_cnt)
853 return -EINVAL;
854 buffer->length = sizeof(struct acpi_resource) * (res_cnt + 1) + 1;
855 buffer->pointer = kzalloc(buffer->length - 1, GFP_KERNEL);
856 if (!buffer->pointer)
857 return -ENOMEM;
858
859 resource = (struct acpi_resource *)buffer->pointer;
860 status = acpi_walk_resources(handle, METHOD_NAME__CRS,
861 pnpacpi_type_resources, &resource);
862 if (ACPI_FAILURE(status)) {
863 kfree(buffer->pointer);
864 dev_err(&dev->dev, "can't evaluate _CRS: %d\n", status);
865 return -EINVAL;
866 }
867 /* resource will pointer the end resource now */
868 resource->type = ACPI_RESOURCE_TYPE_END_TAG;
869
870 return 0;
871 }
872
873 static void pnpacpi_encode_irq(struct pnp_dev *dev,
874 struct acpi_resource *resource,
875 struct resource *p)
876 {
877 struct acpi_resource_irq *irq = &resource->data.irq;
878 int triggering, polarity, shareable;
879
880 if (!pnp_resource_enabled(p)) {
881 irq->interrupt_count = 0;
882 pnp_dbg(&dev->dev, " encode irq (%s)\n",
883 p ? "disabled" : "missing");
884 return;
885 }
886
887 decode_irq_flags(dev, p->flags, &triggering, &polarity, &shareable);
888 irq->triggering = triggering;
889 irq->polarity = polarity;
890 irq->sharable = shareable;
891 irq->interrupt_count = 1;
892 irq->interrupts[0] = p->start;
893
894 pnp_dbg(&dev->dev, " encode irq %d %s %s %s (%d-byte descriptor)\n",
895 (int) p->start,
896 triggering == ACPI_LEVEL_SENSITIVE ? "level" : "edge",
897 polarity == ACPI_ACTIVE_LOW ? "low" : "high",
898 irq->sharable == ACPI_SHARED ? "shared" : "exclusive",
899 irq->descriptor_length);
900 }
901
902 static void pnpacpi_encode_ext_irq(struct pnp_dev *dev,
903 struct acpi_resource *resource,
904 struct resource *p)
905 {
906 struct acpi_resource_extended_irq *extended_irq = &resource->data.extended_irq;
907 int triggering, polarity, shareable;
908
909 if (!pnp_resource_enabled(p)) {
910 extended_irq->interrupt_count = 0;
911 pnp_dbg(&dev->dev, " encode extended irq (%s)\n",
912 p ? "disabled" : "missing");
913 return;
914 }
915
916 decode_irq_flags(dev, p->flags, &triggering, &polarity, &shareable);
917 extended_irq->producer_consumer = ACPI_CONSUMER;
918 extended_irq->triggering = triggering;
919 extended_irq->polarity = polarity;
920 extended_irq->sharable = shareable;
921 extended_irq->interrupt_count = 1;
922 extended_irq->interrupts[0] = p->start;
923
924 pnp_dbg(&dev->dev, " encode irq %d %s %s %s\n", (int) p->start,
925 triggering == ACPI_LEVEL_SENSITIVE ? "level" : "edge",
926 polarity == ACPI_ACTIVE_LOW ? "low" : "high",
927 extended_irq->sharable == ACPI_SHARED ? "shared" : "exclusive");
928 }
929
930 static void pnpacpi_encode_dma(struct pnp_dev *dev,
931 struct acpi_resource *resource,
932 struct resource *p)
933 {
934 struct acpi_resource_dma *dma = &resource->data.dma;
935
936 if (!pnp_resource_enabled(p)) {
937 dma->channel_count = 0;
938 pnp_dbg(&dev->dev, " encode dma (%s)\n",
939 p ? "disabled" : "missing");
940 return;
941 }
942
943 /* Note: pnp_assign_dma will copy pnp_dma->flags into p->flags */
944 switch (p->flags & IORESOURCE_DMA_SPEED_MASK) {
945 case IORESOURCE_DMA_TYPEA:
946 dma->type = ACPI_TYPE_A;
947 break;
948 case IORESOURCE_DMA_TYPEB:
949 dma->type = ACPI_TYPE_B;
950 break;
951 case IORESOURCE_DMA_TYPEF:
952 dma->type = ACPI_TYPE_F;
953 break;
954 default:
955 dma->type = ACPI_COMPATIBILITY;
956 }
957
958 switch (p->flags & IORESOURCE_DMA_TYPE_MASK) {
959 case IORESOURCE_DMA_8BIT:
960 dma->transfer = ACPI_TRANSFER_8;
961 break;
962 case IORESOURCE_DMA_8AND16BIT:
963 dma->transfer = ACPI_TRANSFER_8_16;
964 break;
965 default:
966 dma->transfer = ACPI_TRANSFER_16;
967 }
968
969 dma->bus_master = !!(p->flags & IORESOURCE_DMA_MASTER);
970 dma->channel_count = 1;
971 dma->channels[0] = p->start;
972
973 pnp_dbg(&dev->dev, " encode dma %d "
974 "type %#x transfer %#x master %d\n",
975 (int) p->start, dma->type, dma->transfer, dma->bus_master);
976 }
977
978 static void pnpacpi_encode_io(struct pnp_dev *dev,
979 struct acpi_resource *resource,
980 struct resource *p)
981 {
982 struct acpi_resource_io *io = &resource->data.io;
983
984 if (pnp_resource_enabled(p)) {
985 /* Note: pnp_assign_port copies pnp_port->flags into p->flags */
986 io->io_decode = (p->flags & IORESOURCE_IO_16BIT_ADDR) ?
987 ACPI_DECODE_16 : ACPI_DECODE_10;
988 io->minimum = p->start;
989 io->maximum = p->end;
990 io->alignment = 0; /* Correct? */
991 io->address_length = resource_size(p);
992 } else {
993 io->minimum = 0;
994 io->address_length = 0;
995 }
996
997 pnp_dbg(&dev->dev, " encode io %#x-%#x decode %#x\n", io->minimum,
998 io->minimum + io->address_length - 1, io->io_decode);
999 }
1000
1001 static void pnpacpi_encode_fixed_io(struct pnp_dev *dev,
1002 struct acpi_resource *resource,
1003 struct resource *p)
1004 {
1005 struct acpi_resource_fixed_io *fixed_io = &resource->data.fixed_io;
1006
1007 if (pnp_resource_enabled(p)) {
1008 fixed_io->address = p->start;
1009 fixed_io->address_length = resource_size(p);
1010 } else {
1011 fixed_io->address = 0;
1012 fixed_io->address_length = 0;
1013 }
1014
1015 pnp_dbg(&dev->dev, " encode fixed_io %#x-%#x\n", fixed_io->address,
1016 fixed_io->address + fixed_io->address_length - 1);
1017 }
1018
1019 static void pnpacpi_encode_mem24(struct pnp_dev *dev,
1020 struct acpi_resource *resource,
1021 struct resource *p)
1022 {
1023 struct acpi_resource_memory24 *memory24 = &resource->data.memory24;
1024
1025 if (pnp_resource_enabled(p)) {
1026 /* Note: pnp_assign_mem copies pnp_mem->flags into p->flags */
1027 memory24->write_protect = p->flags & IORESOURCE_MEM_WRITEABLE ?
1028 ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
1029 memory24->minimum = p->start;
1030 memory24->maximum = p->end;
1031 memory24->alignment = 0;
1032 memory24->address_length = resource_size(p);
1033 } else {
1034 memory24->minimum = 0;
1035 memory24->address_length = 0;
1036 }
1037
1038 pnp_dbg(&dev->dev, " encode mem24 %#x-%#x write_protect %#x\n",
1039 memory24->minimum,
1040 memory24->minimum + memory24->address_length - 1,
1041 memory24->write_protect);
1042 }
1043
1044 static void pnpacpi_encode_mem32(struct pnp_dev *dev,
1045 struct acpi_resource *resource,
1046 struct resource *p)
1047 {
1048 struct acpi_resource_memory32 *memory32 = &resource->data.memory32;
1049
1050 if (pnp_resource_enabled(p)) {
1051 memory32->write_protect = p->flags & IORESOURCE_MEM_WRITEABLE ?
1052 ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
1053 memory32->minimum = p->start;
1054 memory32->maximum = p->end;
1055 memory32->alignment = 0;
1056 memory32->address_length = resource_size(p);
1057 } else {
1058 memory32->minimum = 0;
1059 memory32->alignment = 0;
1060 }
1061
1062 pnp_dbg(&dev->dev, " encode mem32 %#x-%#x write_protect %#x\n",
1063 memory32->minimum,
1064 memory32->minimum + memory32->address_length - 1,
1065 memory32->write_protect);
1066 }
1067
1068 static void pnpacpi_encode_fixed_mem32(struct pnp_dev *dev,
1069 struct acpi_resource *resource,
1070 struct resource *p)
1071 {
1072 struct acpi_resource_fixed_memory32 *fixed_memory32 = &resource->data.fixed_memory32;
1073
1074 if (pnp_resource_enabled(p)) {
1075 fixed_memory32->write_protect =
1076 p->flags & IORESOURCE_MEM_WRITEABLE ?
1077 ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
1078 fixed_memory32->address = p->start;
1079 fixed_memory32->address_length = resource_size(p);
1080 } else {
1081 fixed_memory32->address = 0;
1082 fixed_memory32->address_length = 0;
1083 }
1084
1085 pnp_dbg(&dev->dev, " encode fixed_mem32 %#x-%#x write_protect %#x\n",
1086 fixed_memory32->address,
1087 fixed_memory32->address + fixed_memory32->address_length - 1,
1088 fixed_memory32->write_protect);
1089 }
1090
1091 int pnpacpi_encode_resources(struct pnp_dev *dev, struct acpi_buffer *buffer)
1092 {
1093 int i = 0;
1094 /* pnpacpi_build_resource_template allocates extra mem */
1095 int res_cnt = (buffer->length - 1) / sizeof(struct acpi_resource) - 1;
1096 struct acpi_resource *resource = buffer->pointer;
1097 int port = 0, irq = 0, dma = 0, mem = 0;
1098
1099 pnp_dbg(&dev->dev, "encode %d resources\n", res_cnt);
1100 while (i < res_cnt) {
1101 switch (resource->type) {
1102 case ACPI_RESOURCE_TYPE_IRQ:
1103 pnpacpi_encode_irq(dev, resource,
1104 pnp_get_resource(dev, IORESOURCE_IRQ, irq));
1105 irq++;
1106 break;
1107
1108 case ACPI_RESOURCE_TYPE_DMA:
1109 pnpacpi_encode_dma(dev, resource,
1110 pnp_get_resource(dev, IORESOURCE_DMA, dma));
1111 dma++;
1112 break;
1113 case ACPI_RESOURCE_TYPE_IO:
1114 pnpacpi_encode_io(dev, resource,
1115 pnp_get_resource(dev, IORESOURCE_IO, port));
1116 port++;
1117 break;
1118 case ACPI_RESOURCE_TYPE_FIXED_IO:
1119 pnpacpi_encode_fixed_io(dev, resource,
1120 pnp_get_resource(dev, IORESOURCE_IO, port));
1121 port++;
1122 break;
1123 case ACPI_RESOURCE_TYPE_MEMORY24:
1124 pnpacpi_encode_mem24(dev, resource,
1125 pnp_get_resource(dev, IORESOURCE_MEM, mem));
1126 mem++;
1127 break;
1128 case ACPI_RESOURCE_TYPE_MEMORY32:
1129 pnpacpi_encode_mem32(dev, resource,
1130 pnp_get_resource(dev, IORESOURCE_MEM, mem));
1131 mem++;
1132 break;
1133 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
1134 pnpacpi_encode_fixed_mem32(dev, resource,
1135 pnp_get_resource(dev, IORESOURCE_MEM, mem));
1136 mem++;
1137 break;
1138 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
1139 pnpacpi_encode_ext_irq(dev, resource,
1140 pnp_get_resource(dev, IORESOURCE_IRQ, irq));
1141 irq++;
1142 break;
1143 case ACPI_RESOURCE_TYPE_START_DEPENDENT:
1144 case ACPI_RESOURCE_TYPE_END_DEPENDENT:
1145 case ACPI_RESOURCE_TYPE_VENDOR:
1146 case ACPI_RESOURCE_TYPE_END_TAG:
1147 case ACPI_RESOURCE_TYPE_ADDRESS16:
1148 case ACPI_RESOURCE_TYPE_ADDRESS32:
1149 case ACPI_RESOURCE_TYPE_ADDRESS64:
1150 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
1151 case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
1152 default: /* other type */
1153 dev_warn(&dev->dev, "can't encode unknown resource "
1154 "type %d\n", resource->type);
1155 return -EINVAL;
1156 }
1157 resource++;
1158 i++;
1159 }
1160 return 0;
1161 }