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 */
21 /* standard resource tags */
22 #define SMALL_TAG_PNPVERNO 0x01
23 #define SMALL_TAG_LOGDEVID 0x02
24 #define SMALL_TAG_COMPATDEVID 0x03
25 #define SMALL_TAG_IRQ 0x04
26 #define SMALL_TAG_DMA 0x05
27 #define SMALL_TAG_STARTDEP 0x06
28 #define SMALL_TAG_ENDDEP 0x07
29 #define SMALL_TAG_PORT 0x08
30 #define SMALL_TAG_FIXEDPORT 0x09
31 #define SMALL_TAG_VENDOR 0x0e
32 #define SMALL_TAG_END 0x0f
33 #define LARGE_TAG 0x80
34 #define LARGE_TAG_MEM 0x81
35 #define LARGE_TAG_ANSISTR 0x82
36 #define LARGE_TAG_UNICODESTR 0x83
37 #define LARGE_TAG_VENDOR 0x84
38 #define LARGE_TAG_MEM32 0x85
39 #define LARGE_TAG_FIXEDMEM32 0x86
42 * Resource Data Stream Format:
44 * Allocated Resources (required)
46 * Resource Configuration Options (optional)
48 * Compitable Device IDs (optional)
56 static void pnpbios_parse_allocated_irqresource(struct pnp_resource_table *res,
61 while (!(res->irq_resource[i].flags & IORESOURCE_UNSET)
64 if (i < PNP_MAX_IRQ) {
65 res->irq_resource[i].flags = IORESOURCE_IRQ; // Also clears _UNSET flag
67 res->irq_resource[i].flags |= IORESOURCE_DISABLED;
70 res->irq_resource[i].start =
71 res->irq_resource[i].end = (unsigned long)irq;
72 pcibios_penalize_isa_irq(irq, 1);
76 static void pnpbios_parse_allocated_dmaresource(struct pnp_resource_table *res,
81 while (i < PNP_MAX_DMA &&
82 !(res->dma_resource[i].flags & IORESOURCE_UNSET))
84 if (i < PNP_MAX_DMA) {
85 res->dma_resource[i].flags = IORESOURCE_DMA; // Also clears _UNSET flag
87 res->dma_resource[i].flags |= IORESOURCE_DISABLED;
90 res->dma_resource[i].start =
91 res->dma_resource[i].end = (unsigned long)dma;
95 static void pnpbios_parse_allocated_ioresource(struct pnp_resource_table *res,
100 while (!(res->port_resource[i].flags & IORESOURCE_UNSET)
103 if (i < PNP_MAX_PORT) {
104 res->port_resource[i].flags = IORESOURCE_IO; // Also clears _UNSET flag
105 if (len <= 0 || (io + len - 1) >= 0x10003) {
106 res->port_resource[i].flags |= IORESOURCE_DISABLED;
109 res->port_resource[i].start = (unsigned long)io;
110 res->port_resource[i].end = (unsigned long)(io + len - 1);
114 static void pnpbios_parse_allocated_memresource(struct pnp_resource_table *res,
119 while (!(res->mem_resource[i].flags & IORESOURCE_UNSET)
122 if (i < PNP_MAX_MEM) {
123 res->mem_resource[i].flags = IORESOURCE_MEM; // Also clears _UNSET flag
125 res->mem_resource[i].flags |= IORESOURCE_DISABLED;
128 res->mem_resource[i].start = (unsigned long)mem;
129 res->mem_resource[i].end = (unsigned long)(mem + len - 1);
133 static unsigned char *pnpbios_parse_allocated_resource_data(unsigned char *p,
139 unsigned int len, tag;
140 int io, size, mask, i;
145 /* Blank the resource table values */
146 pnp_init_resource_table(res);
148 while ((char *)p < (char *)end) {
150 /* determine the type of tag */
151 if (p[0] & LARGE_TAG) { /* large tag */
152 len = (p[2] << 8) | p[1];
154 } else { /* small tag */
156 tag = ((p[0] >> 3) & 0x0f);
164 io = *(short *)&p[4];
165 size = *(short *)&p[10];
166 pnpbios_parse_allocated_memresource(res, io, size);
169 case LARGE_TAG_ANSISTR:
170 /* ignore this for now */
173 case LARGE_TAG_VENDOR:
177 case LARGE_TAG_MEM32:
181 size = *(int *)&p[16];
182 pnpbios_parse_allocated_memresource(res, io, size);
185 case LARGE_TAG_FIXEDMEM32:
189 size = *(int *)&p[8];
190 pnpbios_parse_allocated_memresource(res, io, size);
194 if (len < 2 || len > 3)
197 mask = p[1] + p[2] * 256;
198 for (i = 0; i < 16; i++, mask = mask >> 1)
201 pnpbios_parse_allocated_irqresource(res, io);
209 for (i = 0; i < 8; i++, mask = mask >> 1)
212 pnpbios_parse_allocated_dmaresource(res, io);
218 io = p[2] + p[3] * 256;
220 pnpbios_parse_allocated_ioresource(res, io, size);
223 case SMALL_TAG_VENDOR:
227 case SMALL_TAG_FIXEDPORT:
230 io = p[1] + p[2] * 256;
232 pnpbios_parse_allocated_ioresource(res, io, size);
237 return (unsigned char *)p;
240 default: /* an unkown tag */
243 "PnPBIOS: Unknown tag '0x%x', length '%d'.\n",
248 /* continue to the next tag */
249 if (p[0] & LARGE_TAG)
256 "PnPBIOS: Resource structure does not contain an end tag.\n");
262 * Resource Configuration Options
265 static void pnpbios_parse_mem_option(unsigned char *p, int size,
266 struct pnp_option *option)
270 mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL);
273 mem->min = ((p[5] << 8) | p[4]) << 8;
274 mem->max = ((p[7] << 8) | p[6]) << 8;
275 mem->align = (p[9] << 8) | p[8];
276 mem->size = ((p[11] << 8) | p[10]) << 8;
278 pnp_register_mem_resource(option, mem);
281 static void pnpbios_parse_mem32_option(unsigned char *p, int size,
282 struct pnp_option *option)
286 mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL);
289 mem->min = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4];
290 mem->max = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
291 mem->align = (p[15] << 24) | (p[14] << 16) | (p[13] << 8) | p[12];
292 mem->size = (p[19] << 24) | (p[18] << 16) | (p[17] << 8) | p[16];
294 pnp_register_mem_resource(option, mem);
297 static void pnpbios_parse_fixed_mem32_option(unsigned char *p, int size,
298 struct pnp_option *option)
301 mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL);
304 mem->min = mem->max = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4];
305 mem->size = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
308 pnp_register_mem_resource(option, mem);
311 static void pnpbios_parse_irq_option(unsigned char *p, int size,
312 struct pnp_option *option)
317 irq = kzalloc(sizeof(struct pnp_irq), GFP_KERNEL);
320 bits = (p[2] << 8) | p[1];
321 bitmap_copy(irq->map, &bits, 16);
325 irq->flags = IORESOURCE_IRQ_HIGHEDGE;
326 pnp_register_irq_resource(option, irq);
329 static void pnpbios_parse_dma_option(unsigned char *p, int size,
330 struct pnp_option *option)
334 dma = kzalloc(sizeof(struct pnp_dma), GFP_KERNEL);
339 pnp_register_dma_resource(option, dma);
342 static void pnpbios_parse_port_option(unsigned char *p, int size,
343 struct pnp_option *option)
345 struct pnp_port *port;
347 port = kzalloc(sizeof(struct pnp_port), GFP_KERNEL);
350 port->min = (p[3] << 8) | p[2];
351 port->max = (p[5] << 8) | p[4];
354 port->flags = p[1] ? PNP_PORT_FLAG_16BITADDR : 0;
355 pnp_register_port_resource(option, port);
358 static void pnpbios_parse_fixed_port_option(unsigned char *p, int size,
359 struct pnp_option *option)
361 struct pnp_port *port;
363 port = kzalloc(sizeof(struct pnp_port), GFP_KERNEL);
366 port->min = port->max = (p[2] << 8) | p[1];
369 port->flags = PNP_PORT_FLAG_FIXED;
370 pnp_register_port_resource(option, port);
373 static unsigned char *pnpbios_parse_resource_option_data(unsigned char *p,
377 unsigned int len, tag;
379 struct pnp_option *option, *option_independent;
384 option_independent = option = pnp_register_independent_option(dev);
388 while ((char *)p < (char *)end) {
390 /* determine the type of tag */
391 if (p[0] & LARGE_TAG) { /* large tag */
392 len = (p[2] << 8) | p[1];
394 } else { /* small tag */
396 tag = ((p[0] >> 3) & 0x0f);
404 pnpbios_parse_mem_option(p, len, option);
407 case LARGE_TAG_MEM32:
410 pnpbios_parse_mem32_option(p, len, option);
413 case LARGE_TAG_FIXEDMEM32:
416 pnpbios_parse_fixed_mem32_option(p, len, option);
420 if (len < 2 || len > 3)
422 pnpbios_parse_irq_option(p, len, option);
428 pnpbios_parse_dma_option(p, len, option);
434 pnpbios_parse_port_option(p, len, option);
437 case SMALL_TAG_VENDOR:
441 case SMALL_TAG_FIXEDPORT:
444 pnpbios_parse_fixed_port_option(p, len, option);
447 case SMALL_TAG_STARTDEP:
450 priority = 0x100 | PNP_RES_PRIORITY_ACCEPTABLE;
452 priority = 0x100 | p[1];
453 option = pnp_register_dependent_option(dev, priority);
458 case SMALL_TAG_ENDDEP:
461 if (option_independent == option)
463 "PnPBIOS: Missing SMALL_TAG_STARTDEP tag\n");
464 option = option_independent;
470 default: /* an unkown tag */
473 "PnPBIOS: Unknown tag '0x%x', length '%d'.\n",
478 /* continue to the next tag */
479 if (p[0] & LARGE_TAG)
486 "PnPBIOS: Resource structure does not contain an end tag.\n");
492 * Compatible Device IDs
495 #define HEX(id,a) hex[((id)>>a) & 15]
496 #define CHAR(id,a) (0x40 + (((id)>>a) & 31))
498 void pnpid32_to_pnpid(u32 id, char *str)
500 const char *hex = "0123456789abcdef";
502 id = be32_to_cpu(id);
503 str[0] = CHAR(id, 26);
504 str[1] = CHAR(id, 21);
505 str[2] = CHAR(id, 16);
506 str[3] = HEX(id, 12);
516 static unsigned char *pnpbios_parse_compatible_ids(unsigned char *p,
522 struct pnp_id *dev_id;
527 while ((char *)p < (char *)end) {
529 /* determine the type of tag */
530 if (p[0] & LARGE_TAG) { /* large tag */
531 len = (p[2] << 8) | p[1];
533 } else { /* small tag */
535 tag = ((p[0] >> 3) & 0x0f);
540 case LARGE_TAG_ANSISTR:
541 strncpy(dev->name, p + 3,
542 len >= PNP_NAME_LEN ? PNP_NAME_LEN - 2 : len);
544 PNP_NAME_LEN ? PNP_NAME_LEN - 1 : len] = '\0';
547 case SMALL_TAG_COMPATDEVID: /* compatible ID */
550 dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
553 pnpid32_to_pnpid(p[1] | p[2] << 8 | p[3] << 16 | p[4] <<
555 memcpy(&dev_id->id, id, 7);
556 pnp_add_id(dev_id, dev);
561 return (unsigned char *)p;
564 default: /* an unkown tag */
567 "PnPBIOS: Unknown tag '0x%x', length '%d'.\n",
572 /* continue to the next tag */
573 if (p[0] & LARGE_TAG)
580 "PnPBIOS: Resource structure does not contain an end tag.\n");
586 * Allocated Resource Encoding
589 static void pnpbios_encode_mem(unsigned char *p, struct resource *res)
591 unsigned long base = res->start;
592 unsigned long len = res->end - res->start + 1;
594 p[4] = (base >> 8) & 0xff;
595 p[5] = ((base >> 8) >> 8) & 0xff;
596 p[6] = (base >> 8) & 0xff;
597 p[7] = ((base >> 8) >> 8) & 0xff;
598 p[10] = (len >> 8) & 0xff;
599 p[11] = ((len >> 8) >> 8) & 0xff;
602 static void pnpbios_encode_mem32(unsigned char *p, struct resource *res)
604 unsigned long base = res->start;
605 unsigned long len = res->end - res->start + 1;
608 p[5] = (base >> 8) & 0xff;
609 p[6] = (base >> 16) & 0xff;
610 p[7] = (base >> 24) & 0xff;
612 p[9] = (base >> 8) & 0xff;
613 p[10] = (base >> 16) & 0xff;
614 p[11] = (base >> 24) & 0xff;
616 p[17] = (len >> 8) & 0xff;
617 p[18] = (len >> 16) & 0xff;
618 p[19] = (len >> 24) & 0xff;
621 static void pnpbios_encode_fixed_mem32(unsigned char *p, 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;
636 static void pnpbios_encode_irq(unsigned char *p, struct resource *res)
638 unsigned long map = 0;
640 map = 1 << res->start;
642 p[2] = (map >> 8) & 0xff;
645 static void pnpbios_encode_dma(unsigned char *p, struct resource *res)
647 unsigned long map = 0;
649 map = 1 << res->start;
653 static void pnpbios_encode_port(unsigned char *p, struct resource *res)
655 unsigned long base = res->start;
656 unsigned long len = res->end - res->start + 1;
659 p[3] = (base >> 8) & 0xff;
661 p[5] = (base >> 8) & 0xff;
665 static void pnpbios_encode_fixed_port(unsigned char *p, struct resource *res)
667 unsigned long base = res->start;
668 unsigned long len = res->end - res->start + 1;
671 p[2] = (base >> 8) & 0xff;
675 static unsigned char *pnpbios_encode_allocated_resource_data(unsigned char *p,
681 unsigned int len, tag;
682 int port = 0, irq = 0, dma = 0, mem = 0;
687 while ((char *)p < (char *)end) {
689 /* determine the type of tag */
690 if (p[0] & LARGE_TAG) { /* large tag */
691 len = (p[2] << 8) | p[1];
693 } else { /* small tag */
695 tag = ((p[0] >> 3) & 0x0f);
703 pnpbios_encode_mem(p, &res->mem_resource[mem]);
707 case LARGE_TAG_MEM32:
710 pnpbios_encode_mem32(p, &res->mem_resource[mem]);
714 case LARGE_TAG_FIXEDMEM32:
717 pnpbios_encode_fixed_mem32(p, &res->mem_resource[mem]);
722 if (len < 2 || len > 3)
724 pnpbios_encode_irq(p, &res->irq_resource[irq]);
731 pnpbios_encode_dma(p, &res->dma_resource[dma]);
738 pnpbios_encode_port(p, &res->port_resource[port]);
742 case SMALL_TAG_VENDOR:
746 case SMALL_TAG_FIXEDPORT:
749 pnpbios_encode_fixed_port(p, &res->port_resource[port]);
755 return (unsigned char *)p;
758 default: /* an unkown tag */
761 "PnPBIOS: Unknown tag '0x%x', length '%d'.\n",
766 /* continue to the next tag */
767 if (p[0] & LARGE_TAG)
774 "PnPBIOS: Resource structure does not contain an end tag.\n");
780 * Core Parsing Functions
783 int pnpbios_parse_data_stream(struct pnp_dev *dev, struct pnp_bios_node *node)
785 unsigned char *p = (char *)node->data;
786 unsigned char *end = (char *)(node->data + node->size);
788 p = pnpbios_parse_allocated_resource_data(p, end, &dev->res);
791 p = pnpbios_parse_resource_option_data(p, end, dev);
794 p = pnpbios_parse_compatible_ids(p, end, dev);
800 int pnpbios_read_resources_from_node(struct pnp_resource_table *res,
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(p, end, res);
812 int pnpbios_write_resources_to_node(struct pnp_resource_table *res,
813 struct pnp_bios_node *node)
815 unsigned char *p = (char *)node->data;
816 unsigned char *end = (char *)(node->data + node->size);
818 p = pnpbios_encode_allocated_resource_data(p, end, res);