796 lines
17 KiB
C
796 lines
17 KiB
C
/*
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* rsparser.c - parses and encodes pnpbios resource data streams
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*
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*/
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#include <linux/config.h>
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#include <linux/ctype.h>
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#include <linux/pnp.h>
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#include <linux/pnpbios.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#ifdef CONFIG_PCI
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#include <linux/pci.h>
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#else
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inline void pcibios_penalize_isa_irq(int irq, int active) {}
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#endif /* CONFIG_PCI */
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#include "pnpbios.h"
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/* standard resource tags */
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#define SMALL_TAG_PNPVERNO 0x01
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#define SMALL_TAG_LOGDEVID 0x02
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#define SMALL_TAG_COMPATDEVID 0x03
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#define SMALL_TAG_IRQ 0x04
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#define SMALL_TAG_DMA 0x05
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#define SMALL_TAG_STARTDEP 0x06
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#define SMALL_TAG_ENDDEP 0x07
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#define SMALL_TAG_PORT 0x08
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#define SMALL_TAG_FIXEDPORT 0x09
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#define SMALL_TAG_VENDOR 0x0e
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#define SMALL_TAG_END 0x0f
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#define LARGE_TAG 0x80
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#define LARGE_TAG_MEM 0x81
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#define LARGE_TAG_ANSISTR 0x82
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#define LARGE_TAG_UNICODESTR 0x83
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#define LARGE_TAG_VENDOR 0x84
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#define LARGE_TAG_MEM32 0x85
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#define LARGE_TAG_FIXEDMEM32 0x86
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/*
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* Resource Data Stream Format:
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*
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* Allocated Resources (required)
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* end tag ->
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* Resource Configuration Options (optional)
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* end tag ->
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* Compitable Device IDs (optional)
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* final end tag ->
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*/
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/*
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* Allocated Resources
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*/
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static void
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pnpbios_parse_allocated_irqresource(struct pnp_resource_table * res, int irq)
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{
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int i = 0;
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while (!(res->irq_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_IRQ) i++;
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if (i < PNP_MAX_IRQ) {
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res->irq_resource[i].flags = IORESOURCE_IRQ; // Also clears _UNSET flag
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if (irq == -1) {
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res->irq_resource[i].flags |= IORESOURCE_DISABLED;
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return;
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}
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res->irq_resource[i].start =
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res->irq_resource[i].end = (unsigned long) irq;
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pcibios_penalize_isa_irq(irq, 1);
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}
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}
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static void
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pnpbios_parse_allocated_dmaresource(struct pnp_resource_table * res, int dma)
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{
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int i = 0;
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while (i < PNP_MAX_DMA &&
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!(res->dma_resource[i].flags & IORESOURCE_UNSET))
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i++;
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if (i < PNP_MAX_DMA) {
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res->dma_resource[i].flags = IORESOURCE_DMA; // Also clears _UNSET flag
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if (dma == -1) {
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res->dma_resource[i].flags |= IORESOURCE_DISABLED;
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return;
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}
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res->dma_resource[i].start =
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res->dma_resource[i].end = (unsigned long) dma;
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}
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}
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static void
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pnpbios_parse_allocated_ioresource(struct pnp_resource_table * res, int io, int len)
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{
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int i = 0;
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while (!(res->port_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_PORT) i++;
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if (i < PNP_MAX_PORT) {
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res->port_resource[i].flags = IORESOURCE_IO; // Also clears _UNSET flag
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if (len <= 0 || (io + len -1) >= 0x10003) {
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res->port_resource[i].flags |= IORESOURCE_DISABLED;
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return;
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}
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res->port_resource[i].start = (unsigned long) io;
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res->port_resource[i].end = (unsigned long)(io + len - 1);
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}
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}
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static void
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pnpbios_parse_allocated_memresource(struct pnp_resource_table * res, int mem, int len)
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{
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int i = 0;
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while (!(res->mem_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_MEM) i++;
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if (i < PNP_MAX_MEM) {
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res->mem_resource[i].flags = IORESOURCE_MEM; // Also clears _UNSET flag
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if (len <= 0) {
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res->mem_resource[i].flags |= IORESOURCE_DISABLED;
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return;
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}
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res->mem_resource[i].start = (unsigned long) mem;
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res->mem_resource[i].end = (unsigned long)(mem + len - 1);
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}
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}
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static unsigned char *
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pnpbios_parse_allocated_resource_data(unsigned char * p, unsigned char * end, struct pnp_resource_table * res)
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{
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unsigned int len, tag;
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int io, size, mask, i;
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if (!p)
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return NULL;
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/* Blank the resource table values */
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pnp_init_resource_table(res);
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while ((char *)p < (char *)end) {
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/* determine the type of tag */
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if (p[0] & LARGE_TAG) { /* large tag */
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len = (p[2] << 8) | p[1];
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tag = p[0];
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} else { /* small tag */
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len = p[0] & 0x07;
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tag = ((p[0]>>3) & 0x0f);
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}
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switch (tag) {
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case LARGE_TAG_MEM:
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if (len != 9)
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goto len_err;
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io = *(short *) &p[4];
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size = *(short *) &p[10];
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pnpbios_parse_allocated_memresource(res, io, size);
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break;
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case LARGE_TAG_ANSISTR:
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/* ignore this for now */
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break;
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case LARGE_TAG_VENDOR:
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/* do nothing */
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break;
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case LARGE_TAG_MEM32:
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if (len != 17)
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goto len_err;
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io = *(int *) &p[4];
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size = *(int *) &p[16];
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pnpbios_parse_allocated_memresource(res, io, size);
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break;
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case LARGE_TAG_FIXEDMEM32:
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if (len != 9)
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goto len_err;
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io = *(int *) &p[4];
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size = *(int *) &p[8];
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pnpbios_parse_allocated_memresource(res, io, size);
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break;
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case SMALL_TAG_IRQ:
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if (len < 2 || len > 3)
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goto len_err;
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io = -1;
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mask= p[1] + p[2]*256;
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for (i=0;i<16;i++, mask=mask>>1)
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if(mask & 0x01) io=i;
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pnpbios_parse_allocated_irqresource(res, io);
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break;
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case SMALL_TAG_DMA:
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if (len != 2)
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goto len_err;
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io = -1;
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mask = p[1];
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for (i=0;i<8;i++, mask = mask>>1)
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if(mask & 0x01) io=i;
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pnpbios_parse_allocated_dmaresource(res, io);
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break;
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case SMALL_TAG_PORT:
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if (len != 7)
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goto len_err;
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io = p[2] + p[3] *256;
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size = p[7];
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pnpbios_parse_allocated_ioresource(res, io, size);
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break;
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case SMALL_TAG_VENDOR:
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/* do nothing */
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break;
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case SMALL_TAG_FIXEDPORT:
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if (len != 3)
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goto len_err;
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io = p[1] + p[2] * 256;
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size = p[3];
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pnpbios_parse_allocated_ioresource(res, io, size);
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break;
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case SMALL_TAG_END:
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p = p + 2;
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return (unsigned char *)p;
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break;
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default: /* an unkown tag */
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len_err:
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printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len);
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break;
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}
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/* continue to the next tag */
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if (p[0] & LARGE_TAG)
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p += len + 3;
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else
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p += len + 1;
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}
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printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n");
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return NULL;
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}
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/*
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* Resource Configuration Options
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*/
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static void
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pnpbios_parse_mem_option(unsigned char *p, int size, struct pnp_option *option)
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{
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struct pnp_mem * mem;
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mem = kcalloc(1, sizeof(struct pnp_mem), GFP_KERNEL);
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if (!mem)
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return;
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mem->min = ((p[5] << 8) | p[4]) << 8;
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mem->max = ((p[7] << 8) | p[6]) << 8;
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mem->align = (p[9] << 8) | p[8];
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mem->size = ((p[11] << 8) | p[10]) << 8;
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mem->flags = p[3];
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pnp_register_mem_resource(option,mem);
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return;
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}
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static void
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pnpbios_parse_mem32_option(unsigned char *p, int size, struct pnp_option *option)
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{
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struct pnp_mem * mem;
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mem = kcalloc(1, sizeof(struct pnp_mem), GFP_KERNEL);
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if (!mem)
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return;
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mem->min = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4];
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mem->max = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
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mem->align = (p[15] << 24) | (p[14] << 16) | (p[13] << 8) | p[12];
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mem->size = (p[19] << 24) | (p[18] << 16) | (p[17] << 8) | p[16];
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mem->flags = p[3];
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pnp_register_mem_resource(option,mem);
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return;
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}
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static void
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pnpbios_parse_fixed_mem32_option(unsigned char *p, int size, struct pnp_option *option)
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{
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struct pnp_mem * mem;
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mem = kcalloc(1, sizeof(struct pnp_mem), GFP_KERNEL);
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if (!mem)
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return;
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mem->min = mem->max = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4];
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mem->size = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
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mem->align = 0;
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mem->flags = p[3];
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pnp_register_mem_resource(option,mem);
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return;
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}
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static void
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pnpbios_parse_irq_option(unsigned char *p, int size, struct pnp_option *option)
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{
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struct pnp_irq * irq;
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unsigned long bits;
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irq = kcalloc(1, sizeof(struct pnp_irq), GFP_KERNEL);
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if (!irq)
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return;
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bits = (p[2] << 8) | p[1];
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bitmap_copy(irq->map, &bits, 16);
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if (size > 2)
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irq->flags = p[3];
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else
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irq->flags = IORESOURCE_IRQ_HIGHEDGE;
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pnp_register_irq_resource(option,irq);
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return;
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}
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static void
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pnpbios_parse_dma_option(unsigned char *p, int size, struct pnp_option *option)
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{
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struct pnp_dma * dma;
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dma = kcalloc(1, sizeof(struct pnp_dma), GFP_KERNEL);
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if (!dma)
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return;
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dma->map = p[1];
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dma->flags = p[2];
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pnp_register_dma_resource(option,dma);
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return;
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}
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static void
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pnpbios_parse_port_option(unsigned char *p, int size, struct pnp_option *option)
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{
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struct pnp_port * port;
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port = kcalloc(1, sizeof(struct pnp_port), GFP_KERNEL);
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if (!port)
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return;
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port->min = (p[3] << 8) | p[2];
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port->max = (p[5] << 8) | p[4];
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port->align = p[6];
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port->size = p[7];
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port->flags = p[1] ? PNP_PORT_FLAG_16BITADDR : 0;
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pnp_register_port_resource(option,port);
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return;
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}
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static void
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pnpbios_parse_fixed_port_option(unsigned char *p, int size, struct pnp_option *option)
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{
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struct pnp_port * port;
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port = kcalloc(1, sizeof(struct pnp_port), GFP_KERNEL);
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if (!port)
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return;
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port->min = port->max = (p[2] << 8) | p[1];
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port->size = p[3];
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port->align = 0;
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port->flags = PNP_PORT_FLAG_FIXED;
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pnp_register_port_resource(option,port);
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return;
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}
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static unsigned char *
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pnpbios_parse_resource_option_data(unsigned char * p, unsigned char * end, struct pnp_dev *dev)
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{
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unsigned int len, tag;
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int priority = 0;
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struct pnp_option *option, *option_independent;
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if (!p)
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return NULL;
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option_independent = option = pnp_register_independent_option(dev);
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if (!option)
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return NULL;
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while ((char *)p < (char *)end) {
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/* determine the type of tag */
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if (p[0] & LARGE_TAG) { /* large tag */
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len = (p[2] << 8) | p[1];
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tag = p[0];
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} else { /* small tag */
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len = p[0] & 0x07;
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tag = ((p[0]>>3) & 0x0f);
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}
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switch (tag) {
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case LARGE_TAG_MEM:
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if (len != 9)
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goto len_err;
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pnpbios_parse_mem_option(p, len, option);
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break;
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case LARGE_TAG_MEM32:
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if (len != 17)
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goto len_err;
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pnpbios_parse_mem32_option(p, len, option);
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break;
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case LARGE_TAG_FIXEDMEM32:
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if (len != 9)
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goto len_err;
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pnpbios_parse_fixed_mem32_option(p, len, option);
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break;
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case SMALL_TAG_IRQ:
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if (len < 2 || len > 3)
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goto len_err;
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pnpbios_parse_irq_option(p, len, option);
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break;
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case SMALL_TAG_DMA:
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if (len != 2)
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goto len_err;
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pnpbios_parse_dma_option(p, len, option);
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break;
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case SMALL_TAG_PORT:
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if (len != 7)
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goto len_err;
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pnpbios_parse_port_option(p, len, option);
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break;
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case SMALL_TAG_VENDOR:
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/* do nothing */
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break;
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case SMALL_TAG_FIXEDPORT:
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if (len != 3)
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goto len_err;
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pnpbios_parse_fixed_port_option(p, len, option);
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break;
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case SMALL_TAG_STARTDEP:
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if (len > 1)
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goto len_err;
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priority = 0x100 | PNP_RES_PRIORITY_ACCEPTABLE;
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if (len > 0)
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priority = 0x100 | p[1];
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option = pnp_register_dependent_option(dev, priority);
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if (!option)
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return NULL;
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break;
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case SMALL_TAG_ENDDEP:
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if (len != 0)
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goto len_err;
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if (option_independent == option)
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printk(KERN_WARNING "PnPBIOS: Missing SMALL_TAG_STARTDEP tag\n");
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option = option_independent;
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break;
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case SMALL_TAG_END:
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return p + 2;
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default: /* an unkown tag */
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len_err:
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printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len);
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break;
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}
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/* continue to the next tag */
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if (p[0] & LARGE_TAG)
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p += len + 3;
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else
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p += len + 1;
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}
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printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n");
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return NULL;
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}
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/*
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* Compatible Device IDs
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*/
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#define HEX(id,a) hex[((id)>>a) & 15]
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#define CHAR(id,a) (0x40 + (((id)>>a) & 31))
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//
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void pnpid32_to_pnpid(u32 id, char *str)
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{
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const char *hex = "0123456789abcdef";
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id = be32_to_cpu(id);
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str[0] = CHAR(id, 26);
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str[1] = CHAR(id, 21);
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str[2] = CHAR(id,16);
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str[3] = HEX(id, 12);
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str[4] = HEX(id, 8);
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str[5] = HEX(id, 4);
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str[6] = HEX(id, 0);
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str[7] = '\0';
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return;
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}
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//
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#undef CHAR
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#undef HEX
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static unsigned char *
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pnpbios_parse_compatible_ids(unsigned char *p, unsigned char *end, struct pnp_dev *dev)
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{
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int len, tag;
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char id[8];
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struct pnp_id *dev_id;
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if (!p)
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return NULL;
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while ((char *)p < (char *)end) {
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/* determine the type of tag */
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if (p[0] & LARGE_TAG) { /* large tag */
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len = (p[2] << 8) | p[1];
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tag = p[0];
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} else { /* small tag */
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len = p[0] & 0x07;
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tag = ((p[0]>>3) & 0x0f);
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}
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switch (tag) {
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case LARGE_TAG_ANSISTR:
|
|
strncpy(dev->name, p + 3, len >= PNP_NAME_LEN ? PNP_NAME_LEN - 2 : len);
|
|
dev->name[len >= PNP_NAME_LEN ? PNP_NAME_LEN - 1 : len] = '\0';
|
|
break;
|
|
|
|
case SMALL_TAG_COMPATDEVID: /* compatible ID */
|
|
if (len != 4)
|
|
goto len_err;
|
|
dev_id = kcalloc(1, sizeof (struct pnp_id), GFP_KERNEL);
|
|
if (!dev_id)
|
|
return NULL;
|
|
memset(dev_id, 0, sizeof(struct pnp_id));
|
|
pnpid32_to_pnpid(p[1] | p[2] << 8 | p[3] << 16 | p[4] << 24,id);
|
|
memcpy(&dev_id->id, id, 7);
|
|
pnp_add_id(dev_id, dev);
|
|
break;
|
|
|
|
case SMALL_TAG_END:
|
|
p = p + 2;
|
|
return (unsigned char *)p;
|
|
break;
|
|
|
|
default: /* an unkown tag */
|
|
len_err:
|
|
printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len);
|
|
break;
|
|
}
|
|
|
|
/* continue to the next tag */
|
|
if (p[0] & LARGE_TAG)
|
|
p += len + 3;
|
|
else
|
|
p += len + 1;
|
|
}
|
|
|
|
printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n");
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/*
|
|
* Allocated Resource Encoding
|
|
*/
|
|
|
|
static void pnpbios_encode_mem(unsigned char *p, struct resource * res)
|
|
{
|
|
unsigned long base = res->start;
|
|
unsigned long len = res->end - res->start + 1;
|
|
p[4] = (base >> 8) & 0xff;
|
|
p[5] = ((base >> 8) >> 8) & 0xff;
|
|
p[6] = (base >> 8) & 0xff;
|
|
p[7] = ((base >> 8) >> 8) & 0xff;
|
|
p[10] = (len >> 8) & 0xff;
|
|
p[11] = ((len >> 8) >> 8) & 0xff;
|
|
return;
|
|
}
|
|
|
|
static void pnpbios_encode_mem32(unsigned char *p, struct resource * res)
|
|
{
|
|
unsigned long base = res->start;
|
|
unsigned long len = res->end - res->start + 1;
|
|
p[4] = base & 0xff;
|
|
p[5] = (base >> 8) & 0xff;
|
|
p[6] = (base >> 16) & 0xff;
|
|
p[7] = (base >> 24) & 0xff;
|
|
p[8] = base & 0xff;
|
|
p[9] = (base >> 8) & 0xff;
|
|
p[10] = (base >> 16) & 0xff;
|
|
p[11] = (base >> 24) & 0xff;
|
|
p[16] = len & 0xff;
|
|
p[17] = (len >> 8) & 0xff;
|
|
p[18] = (len >> 16) & 0xff;
|
|
p[19] = (len >> 24) & 0xff;
|
|
return;
|
|
}
|
|
|
|
static void pnpbios_encode_fixed_mem32(unsigned char *p, struct resource * res)
|
|
{ unsigned long base = res->start;
|
|
unsigned long len = res->end - res->start + 1;
|
|
p[4] = base & 0xff;
|
|
p[5] = (base >> 8) & 0xff;
|
|
p[6] = (base >> 16) & 0xff;
|
|
p[7] = (base >> 24) & 0xff;
|
|
p[8] = len & 0xff;
|
|
p[9] = (len >> 8) & 0xff;
|
|
p[10] = (len >> 16) & 0xff;
|
|
p[11] = (len >> 24) & 0xff;
|
|
return;
|
|
}
|
|
|
|
static void pnpbios_encode_irq(unsigned char *p, struct resource * res)
|
|
{
|
|
unsigned long map = 0;
|
|
map = 1 << res->start;
|
|
p[1] = map & 0xff;
|
|
p[2] = (map >> 8) & 0xff;
|
|
return;
|
|
}
|
|
|
|
static void pnpbios_encode_dma(unsigned char *p, struct resource * res)
|
|
{
|
|
unsigned long map = 0;
|
|
map = 1 << res->start;
|
|
p[1] = map & 0xff;
|
|
return;
|
|
}
|
|
|
|
static void pnpbios_encode_port(unsigned char *p, struct resource * res)
|
|
{
|
|
unsigned long base = res->start;
|
|
unsigned long len = res->end - res->start + 1;
|
|
p[2] = base & 0xff;
|
|
p[3] = (base >> 8) & 0xff;
|
|
p[4] = base & 0xff;
|
|
p[5] = (base >> 8) & 0xff;
|
|
p[7] = len & 0xff;
|
|
return;
|
|
}
|
|
|
|
static void pnpbios_encode_fixed_port(unsigned char *p, struct resource * res)
|
|
{
|
|
unsigned long base = res->start;
|
|
unsigned long len = res->end - res->start + 1;
|
|
p[1] = base & 0xff;
|
|
p[2] = (base >> 8) & 0xff;
|
|
p[3] = len & 0xff;
|
|
return;
|
|
}
|
|
|
|
static unsigned char *
|
|
pnpbios_encode_allocated_resource_data(unsigned char * p, unsigned char * end, struct pnp_resource_table * res)
|
|
{
|
|
unsigned int len, tag;
|
|
int port = 0, irq = 0, dma = 0, mem = 0;
|
|
|
|
if (!p)
|
|
return NULL;
|
|
|
|
while ((char *)p < (char *)end) {
|
|
|
|
/* determine the type of tag */
|
|
if (p[0] & LARGE_TAG) { /* large tag */
|
|
len = (p[2] << 8) | p[1];
|
|
tag = p[0];
|
|
} else { /* small tag */
|
|
len = p[0] & 0x07;
|
|
tag = ((p[0]>>3) & 0x0f);
|
|
}
|
|
|
|
switch (tag) {
|
|
|
|
case LARGE_TAG_MEM:
|
|
if (len != 9)
|
|
goto len_err;
|
|
pnpbios_encode_mem(p, &res->mem_resource[mem]);
|
|
mem++;
|
|
break;
|
|
|
|
case LARGE_TAG_MEM32:
|
|
if (len != 17)
|
|
goto len_err;
|
|
pnpbios_encode_mem32(p, &res->mem_resource[mem]);
|
|
mem++;
|
|
break;
|
|
|
|
case LARGE_TAG_FIXEDMEM32:
|
|
if (len != 9)
|
|
goto len_err;
|
|
pnpbios_encode_fixed_mem32(p, &res->mem_resource[mem]);
|
|
mem++;
|
|
break;
|
|
|
|
case SMALL_TAG_IRQ:
|
|
if (len < 2 || len > 3)
|
|
goto len_err;
|
|
pnpbios_encode_irq(p, &res->irq_resource[irq]);
|
|
irq++;
|
|
break;
|
|
|
|
case SMALL_TAG_DMA:
|
|
if (len != 2)
|
|
goto len_err;
|
|
pnpbios_encode_dma(p, &res->dma_resource[dma]);
|
|
dma++;
|
|
break;
|
|
|
|
case SMALL_TAG_PORT:
|
|
if (len != 7)
|
|
goto len_err;
|
|
pnpbios_encode_port(p, &res->port_resource[port]);
|
|
port++;
|
|
break;
|
|
|
|
case SMALL_TAG_VENDOR:
|
|
/* do nothing */
|
|
break;
|
|
|
|
case SMALL_TAG_FIXEDPORT:
|
|
if (len != 3)
|
|
goto len_err;
|
|
pnpbios_encode_fixed_port(p, &res->port_resource[port]);
|
|
port++;
|
|
break;
|
|
|
|
case SMALL_TAG_END:
|
|
p = p + 2;
|
|
return (unsigned char *)p;
|
|
break;
|
|
|
|
default: /* an unkown tag */
|
|
len_err:
|
|
printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len);
|
|
break;
|
|
}
|
|
|
|
/* continue to the next tag */
|
|
if (p[0] & LARGE_TAG)
|
|
p += len + 3;
|
|
else
|
|
p += len + 1;
|
|
}
|
|
|
|
printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n");
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/*
|
|
* Core Parsing Functions
|
|
*/
|
|
|
|
int
|
|
pnpbios_parse_data_stream(struct pnp_dev *dev, struct pnp_bios_node * node)
|
|
{
|
|
unsigned char * p = (char *)node->data;
|
|
unsigned char * end = (char *)(node->data + node->size);
|
|
p = pnpbios_parse_allocated_resource_data(p,end,&dev->res);
|
|
if (!p)
|
|
return -EIO;
|
|
p = pnpbios_parse_resource_option_data(p,end,dev);
|
|
if (!p)
|
|
return -EIO;
|
|
p = pnpbios_parse_compatible_ids(p,end,dev);
|
|
if (!p)
|
|
return -EIO;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
pnpbios_read_resources_from_node(struct pnp_resource_table *res,
|
|
struct pnp_bios_node * node)
|
|
{
|
|
unsigned char * p = (char *)node->data;
|
|
unsigned char * end = (char *)(node->data + node->size);
|
|
p = pnpbios_parse_allocated_resource_data(p,end,res);
|
|
if (!p)
|
|
return -EIO;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
pnpbios_write_resources_to_node(struct pnp_resource_table *res,
|
|
struct pnp_bios_node * node)
|
|
{
|
|
unsigned char * p = (char *)node->data;
|
|
unsigned char * end = (char *)(node->data + node->size);
|
|
p = pnpbios_encode_allocated_resource_data(p,end,res);
|
|
if (!p)
|
|
return -EIO;
|
|
return 0;
|
|
}
|