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