2 * rsparser.c - parses and encodes pnpbios resource data streams
5 #include <linux/ctype.h>
7 #include <linux/pnpbios.h>
8 #include <linux/string.h>
9 #include <linux/slab.h>
12 #include <linux/pci.h>
14 inline void pcibios_penalize_isa_irq(int irq, int active)
17 #endif /* CONFIG_PCI */
22 /* standard resource tags */
23 #define SMALL_TAG_PNPVERNO 0x01
24 #define SMALL_TAG_LOGDEVID 0x02
25 #define SMALL_TAG_COMPATDEVID 0x03
26 #define SMALL_TAG_IRQ 0x04
27 #define SMALL_TAG_DMA 0x05
28 #define SMALL_TAG_STARTDEP 0x06
29 #define SMALL_TAG_ENDDEP 0x07
30 #define SMALL_TAG_PORT 0x08
31 #define SMALL_TAG_FIXEDPORT 0x09
32 #define SMALL_TAG_VENDOR 0x0e
33 #define SMALL_TAG_END 0x0f
34 #define LARGE_TAG 0x80
35 #define LARGE_TAG_MEM 0x81
36 #define LARGE_TAG_ANSISTR 0x82
37 #define LARGE_TAG_UNICODESTR 0x83
38 #define LARGE_TAG_VENDOR 0x84
39 #define LARGE_TAG_MEM32 0x85
40 #define LARGE_TAG_FIXEDMEM32 0x86
43 * Resource Data Stream Format:
45 * Allocated Resources (required)
47 * Resource Configuration Options (optional)
49 * Compitable Device IDs (optional)
57 static void pnpbios_parse_allocated_irqresource(struct pnp_dev *dev, int irq)
59 struct pnp_resource_table *res = &dev->res;
62 while (!(res->irq_resource[i].flags & IORESOURCE_UNSET)
65 if (i < PNP_MAX_IRQ) {
66 res->irq_resource[i].flags = IORESOURCE_IRQ; // Also clears _UNSET flag
68 res->irq_resource[i].flags |= IORESOURCE_DISABLED;
71 res->irq_resource[i].start =
72 res->irq_resource[i].end = (unsigned long)irq;
73 pcibios_penalize_isa_irq(irq, 1);
77 static void pnpbios_parse_allocated_dmaresource(struct pnp_dev *dev, int dma)
79 struct pnp_resource_table *res = &dev->res;
82 while (i < PNP_MAX_DMA &&
83 !(res->dma_resource[i].flags & IORESOURCE_UNSET))
85 if (i < PNP_MAX_DMA) {
86 res->dma_resource[i].flags = IORESOURCE_DMA; // Also clears _UNSET flag
88 res->dma_resource[i].flags |= IORESOURCE_DISABLED;
91 res->dma_resource[i].start =
92 res->dma_resource[i].end = (unsigned long)dma;
96 static void pnpbios_parse_allocated_ioresource(struct pnp_dev *dev,
99 struct pnp_resource_table *res = &dev->res;
102 while (!(res->port_resource[i].flags & IORESOURCE_UNSET)
105 if (i < PNP_MAX_PORT) {
106 res->port_resource[i].flags = IORESOURCE_IO; // Also clears _UNSET flag
107 if (len <= 0 || (io + len - 1) >= 0x10003) {
108 res->port_resource[i].flags |= IORESOURCE_DISABLED;
111 res->port_resource[i].start = (unsigned long)io;
112 res->port_resource[i].end = (unsigned long)(io + len - 1);
116 static void pnpbios_parse_allocated_memresource(struct pnp_dev *dev,
119 struct pnp_resource_table *res = &dev->res;
122 while (!(res->mem_resource[i].flags & IORESOURCE_UNSET)
125 if (i < PNP_MAX_MEM) {
126 res->mem_resource[i].flags = IORESOURCE_MEM; // Also clears _UNSET flag
128 res->mem_resource[i].flags |= IORESOURCE_DISABLED;
131 res->mem_resource[i].start = (unsigned long)mem;
132 res->mem_resource[i].end = (unsigned long)(mem + len - 1);
136 static unsigned char *pnpbios_parse_allocated_resource_data(struct pnp_dev *dev,
140 unsigned int len, tag;
141 int io, size, mask, i;
146 dev_dbg(&dev->dev, "parse allocated resources\n");
148 pnp_init_resources(dev);
150 while ((char *)p < (char *)end) {
152 /* determine the type of tag */
153 if (p[0] & LARGE_TAG) { /* large tag */
154 len = (p[2] << 8) | p[1];
156 } else { /* small tag */
158 tag = ((p[0] >> 3) & 0x0f);
166 io = *(short *)&p[4];
167 size = *(short *)&p[10];
168 pnpbios_parse_allocated_memresource(dev, io, size);
171 case LARGE_TAG_ANSISTR:
172 /* ignore this for now */
175 case LARGE_TAG_VENDOR:
179 case LARGE_TAG_MEM32:
183 size = *(int *)&p[16];
184 pnpbios_parse_allocated_memresource(dev, io, size);
187 case LARGE_TAG_FIXEDMEM32:
191 size = *(int *)&p[8];
192 pnpbios_parse_allocated_memresource(dev, io, size);
196 if (len < 2 || len > 3)
199 mask = p[1] + p[2] * 256;
200 for (i = 0; i < 16; i++, mask = mask >> 1)
203 pnpbios_parse_allocated_irqresource(dev, io);
211 for (i = 0; i < 8; i++, mask = mask >> 1)
214 pnpbios_parse_allocated_dmaresource(dev, io);
220 io = p[2] + p[3] * 256;
222 pnpbios_parse_allocated_ioresource(dev, io, size);
225 case SMALL_TAG_VENDOR:
229 case SMALL_TAG_FIXEDPORT:
232 io = p[1] + p[2] * 256;
234 pnpbios_parse_allocated_ioresource(dev, io, size);
239 return (unsigned char *)p;
242 default: /* an unkown tag */
245 "PnPBIOS: Unknown tag '0x%x', length '%d'.\n",
250 /* continue to the next tag */
251 if (p[0] & LARGE_TAG)
258 "PnPBIOS: Resource structure does not contain an end tag.\n");
264 * Resource Configuration Options
267 static __init void pnpbios_parse_mem_option(struct pnp_dev *dev,
268 unsigned char *p, int size,
269 struct pnp_option *option)
273 mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL);
276 mem->min = ((p[5] << 8) | p[4]) << 8;
277 mem->max = ((p[7] << 8) | p[6]) << 8;
278 mem->align = (p[9] << 8) | p[8];
279 mem->size = ((p[11] << 8) | p[10]) << 8;
281 pnp_register_mem_resource(dev, option, mem);
284 static __init void pnpbios_parse_mem32_option(struct pnp_dev *dev,
285 unsigned char *p, int size,
286 struct pnp_option *option)
290 mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL);
293 mem->min = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4];
294 mem->max = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
295 mem->align = (p[15] << 24) | (p[14] << 16) | (p[13] << 8) | p[12];
296 mem->size = (p[19] << 24) | (p[18] << 16) | (p[17] << 8) | p[16];
298 pnp_register_mem_resource(dev, option, mem);
301 static __init void pnpbios_parse_fixed_mem32_option(struct pnp_dev *dev,
302 unsigned char *p, int size,
303 struct pnp_option *option)
307 mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL);
310 mem->min = mem->max = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4];
311 mem->size = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
314 pnp_register_mem_resource(dev, option, mem);
317 static __init void pnpbios_parse_irq_option(struct pnp_dev *dev,
318 unsigned char *p, int size,
319 struct pnp_option *option)
324 irq = kzalloc(sizeof(struct pnp_irq), GFP_KERNEL);
327 bits = (p[2] << 8) | p[1];
328 bitmap_copy(irq->map, &bits, 16);
332 irq->flags = IORESOURCE_IRQ_HIGHEDGE;
333 pnp_register_irq_resource(dev, option, irq);
336 static __init void pnpbios_parse_dma_option(struct pnp_dev *dev,
337 unsigned char *p, int size,
338 struct pnp_option *option)
342 dma = kzalloc(sizeof(struct pnp_dma), GFP_KERNEL);
347 pnp_register_dma_resource(dev, option, dma);
350 static __init void pnpbios_parse_port_option(struct pnp_dev *dev,
351 unsigned char *p, int size,
352 struct pnp_option *option)
354 struct pnp_port *port;
356 port = kzalloc(sizeof(struct pnp_port), GFP_KERNEL);
359 port->min = (p[3] << 8) | p[2];
360 port->max = (p[5] << 8) | p[4];
363 port->flags = p[1] ? PNP_PORT_FLAG_16BITADDR : 0;
364 pnp_register_port_resource(dev, option, port);
367 static __init void pnpbios_parse_fixed_port_option(struct pnp_dev *dev,
368 unsigned char *p, int size,
369 struct pnp_option *option)
371 struct pnp_port *port;
373 port = kzalloc(sizeof(struct pnp_port), GFP_KERNEL);
376 port->min = port->max = (p[2] << 8) | p[1];
379 port->flags = PNP_PORT_FLAG_FIXED;
380 pnp_register_port_resource(dev, option, port);
383 static __init unsigned char *
384 pnpbios_parse_resource_option_data(unsigned char *p, unsigned char *end,
387 unsigned int len, tag;
389 struct pnp_option *option, *option_independent;
394 dev_dbg(&dev->dev, "parse resource options\n");
396 option_independent = option = pnp_register_independent_option(dev);
400 while ((char *)p < (char *)end) {
402 /* determine the type of tag */
403 if (p[0] & LARGE_TAG) { /* large tag */
404 len = (p[2] << 8) | p[1];
406 } else { /* small tag */
408 tag = ((p[0] >> 3) & 0x0f);
416 pnpbios_parse_mem_option(dev, p, len, option);
419 case LARGE_TAG_MEM32:
422 pnpbios_parse_mem32_option(dev, p, len, option);
425 case LARGE_TAG_FIXEDMEM32:
428 pnpbios_parse_fixed_mem32_option(dev, p, len, option);
432 if (len < 2 || len > 3)
434 pnpbios_parse_irq_option(dev, p, len, option);
440 pnpbios_parse_dma_option(dev, p, len, option);
446 pnpbios_parse_port_option(dev, p, len, option);
449 case SMALL_TAG_VENDOR:
453 case SMALL_TAG_FIXEDPORT:
456 pnpbios_parse_fixed_port_option(dev, p, len, option);
459 case SMALL_TAG_STARTDEP:
462 priority = 0x100 | PNP_RES_PRIORITY_ACCEPTABLE;
464 priority = 0x100 | p[1];
465 option = pnp_register_dependent_option(dev, priority);
470 case SMALL_TAG_ENDDEP:
473 if (option_independent == option)
475 "PnPBIOS: Missing SMALL_TAG_STARTDEP tag\n");
476 option = option_independent;
477 dev_dbg(&dev->dev, "end dependent options\n");
483 default: /* an unkown tag */
486 "PnPBIOS: Unknown tag '0x%x', length '%d'.\n",
491 /* continue to the next tag */
492 if (p[0] & LARGE_TAG)
499 "PnPBIOS: Resource structure does not contain an end tag.\n");
505 * Compatible Device IDs
508 static unsigned char *pnpbios_parse_compatible_ids(unsigned char *p,
515 struct pnp_id *dev_id;
520 while ((char *)p < (char *)end) {
522 /* determine the type of tag */
523 if (p[0] & LARGE_TAG) { /* large tag */
524 len = (p[2] << 8) | p[1];
526 } else { /* small tag */
528 tag = ((p[0] >> 3) & 0x0f);
533 case LARGE_TAG_ANSISTR:
534 strncpy(dev->name, p + 3,
535 len >= PNP_NAME_LEN ? PNP_NAME_LEN - 2 : len);
537 PNP_NAME_LEN ? PNP_NAME_LEN - 1 : len] = '\0';
540 case SMALL_TAG_COMPATDEVID: /* compatible ID */
543 eisa_id = p[1] | p[2] << 8 | p[3] << 16 | p[4] << 24;
544 pnp_eisa_id_to_string(eisa_id & PNP_EISA_ID_MASK, id);
545 dev_id = pnp_add_id(dev, id);
552 return (unsigned char *)p;
555 default: /* an unkown tag */
558 "PnPBIOS: Unknown tag '0x%x', length '%d'.\n",
563 /* continue to the next tag */
564 if (p[0] & LARGE_TAG)
571 "PnPBIOS: Resource structure does not contain an end tag.\n");
577 * Allocated Resource Encoding
580 static void pnpbios_encode_mem(struct pnp_dev *dev, unsigned char *p,
581 struct resource *res)
583 unsigned long base = res->start;
584 unsigned long len = res->end - res->start + 1;
586 p[4] = (base >> 8) & 0xff;
587 p[5] = ((base >> 8) >> 8) & 0xff;
588 p[6] = (base >> 8) & 0xff;
589 p[7] = ((base >> 8) >> 8) & 0xff;
590 p[10] = (len >> 8) & 0xff;
591 p[11] = ((len >> 8) >> 8) & 0xff;
593 dev_dbg(&dev->dev, " encode mem %#llx-%#llx\n",
594 (unsigned long long) res->start, (unsigned long long) res->end);
597 static void pnpbios_encode_mem32(struct pnp_dev *dev, unsigned char *p,
598 struct resource *res)
600 unsigned long base = res->start;
601 unsigned long len = res->end - res->start + 1;
604 p[5] = (base >> 8) & 0xff;
605 p[6] = (base >> 16) & 0xff;
606 p[7] = (base >> 24) & 0xff;
608 p[9] = (base >> 8) & 0xff;
609 p[10] = (base >> 16) & 0xff;
610 p[11] = (base >> 24) & 0xff;
612 p[17] = (len >> 8) & 0xff;
613 p[18] = (len >> 16) & 0xff;
614 p[19] = (len >> 24) & 0xff;
616 dev_dbg(&dev->dev, " encode mem32 %#llx-%#llx\n",
617 (unsigned long long) res->start, (unsigned long long) res->end);
620 static void pnpbios_encode_fixed_mem32(struct pnp_dev *dev, unsigned char *p,
621 struct resource *res)
623 unsigned long base = res->start;
624 unsigned long len = res->end - res->start + 1;
627 p[5] = (base >> 8) & 0xff;
628 p[6] = (base >> 16) & 0xff;
629 p[7] = (base >> 24) & 0xff;
631 p[9] = (len >> 8) & 0xff;
632 p[10] = (len >> 16) & 0xff;
633 p[11] = (len >> 24) & 0xff;
635 dev_dbg(&dev->dev, " encode fixed_mem32 %#llx-%#llx\n",
636 (unsigned long long) res->start, (unsigned long long) res->end);
639 static void pnpbios_encode_irq(struct pnp_dev *dev, unsigned char *p,
640 struct resource *res)
642 unsigned long map = 0;
644 map = 1 << res->start;
646 p[2] = (map >> 8) & 0xff;
648 dev_dbg(&dev->dev, " encode irq %d\n", res->start);
651 static void pnpbios_encode_dma(struct pnp_dev *dev, unsigned char *p,
652 struct resource *res)
654 unsigned long map = 0;
656 map = 1 << res->start;
659 dev_dbg(&dev->dev, " encode dma %d\n", res->start);
662 static void pnpbios_encode_port(struct pnp_dev *dev, unsigned char *p,
663 struct resource *res)
665 unsigned long base = res->start;
666 unsigned long len = res->end - res->start + 1;
669 p[3] = (base >> 8) & 0xff;
671 p[5] = (base >> 8) & 0xff;
674 dev_dbg(&dev->dev, " encode io %#llx-%#llx\n",
675 (unsigned long long) res->start, (unsigned long long) res->end);
678 static void pnpbios_encode_fixed_port(struct pnp_dev *dev, unsigned char *p,
679 struct resource *res)
681 unsigned long base = res->start;
682 unsigned long len = res->end - res->start + 1;
685 p[2] = (base >> 8) & 0xff;
688 dev_dbg(&dev->dev, " encode fixed_io %#llx-%#llx\n",
689 (unsigned long long) res->start, (unsigned long long) res->end);
692 static unsigned char *pnpbios_encode_allocated_resource_data(struct pnp_dev
697 struct pnp_resource_table *res = &dev->res;
698 unsigned int len, tag;
699 int port = 0, irq = 0, dma = 0, mem = 0;
704 while ((char *)p < (char *)end) {
706 /* determine the type of tag */
707 if (p[0] & LARGE_TAG) { /* large tag */
708 len = (p[2] << 8) | p[1];
710 } else { /* small tag */
712 tag = ((p[0] >> 3) & 0x0f);
720 pnpbios_encode_mem(dev, p, &res->mem_resource[mem]);
724 case LARGE_TAG_MEM32:
727 pnpbios_encode_mem32(dev, p, &res->mem_resource[mem]);
731 case LARGE_TAG_FIXEDMEM32:
734 pnpbios_encode_fixed_mem32(dev, p, &res->mem_resource[mem]);
739 if (len < 2 || len > 3)
741 pnpbios_encode_irq(dev, p, &res->irq_resource[irq]);
748 pnpbios_encode_dma(dev, p, &res->dma_resource[dma]);
755 pnpbios_encode_port(dev, p, &res->port_resource[port]);
759 case SMALL_TAG_VENDOR:
763 case SMALL_TAG_FIXEDPORT:
766 pnpbios_encode_fixed_port(dev, p, &res->port_resource[port]);
772 return (unsigned char *)p;
775 default: /* an unkown tag */
778 "PnPBIOS: Unknown tag '0x%x', length '%d'.\n",
783 /* continue to the next tag */
784 if (p[0] & LARGE_TAG)
791 "PnPBIOS: Resource structure does not contain an end tag.\n");
797 * Core Parsing Functions
800 int __init pnpbios_parse_data_stream(struct pnp_dev *dev,
801 struct pnp_bios_node *node)
803 unsigned char *p = (char *)node->data;
804 unsigned char *end = (char *)(node->data + node->size);
806 p = pnpbios_parse_allocated_resource_data(dev, p, end);
809 p = pnpbios_parse_resource_option_data(p, end, dev);
812 p = pnpbios_parse_compatible_ids(p, end, dev);
818 int pnpbios_read_resources_from_node(struct pnp_dev *dev,
819 struct pnp_bios_node *node)
821 unsigned char *p = (char *)node->data;
822 unsigned char *end = (char *)(node->data + node->size);
824 p = pnpbios_parse_allocated_resource_data(dev, p, end);
830 int pnpbios_write_resources_to_node(struct pnp_dev *dev,
831 struct pnp_bios_node *node)
833 unsigned char *p = (char *)node->data;
834 unsigned char *end = (char *)(node->data + node->size);
836 p = pnpbios_encode_allocated_resource_data(dev, p, end);