/*
* 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 void
pnpbios_parse_mem_option(unsigned char *p, int size, struct pnp_option *option)
{
struct pnp_mem * mem;
mem = kcalloc(1, 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);
return;
}
static void
pnpbios_parse_mem32_option(unsigned char *p, int size, struct pnp_option *option)
{
struct pnp_mem * mem;
mem = kcalloc(1, 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);
return;
}
static void
pnpbios_parse_fixed_mem32_option(unsigned char *p, int size, struct pnp_option *option)
{
struct pnp_mem * mem;
mem = kcalloc(1, 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);
return;
}
static void
pnpbios_parse_irq_option(unsigned char *p, int size, struct pnp_option *option)
{
struct pnp_irq * irq;
unsigned long bits;
irq = kcalloc(1, 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);
return;
}
static void
pnpbios_parse_dma_option(unsigned char *p, int size, struct pnp_option *option)
{
struct pnp_dma * dma;
dma = kcalloc(1, sizeof(struct pnp_dma), GFP_KERNEL);
if (!dma)
return;
dma->map = p[1];
dma->flags = p[2];
pnp_register_dma_resource(option,dma);
return;
}
static void
pnpbios_parse_port_option(unsigned char *p, int size, struct pnp_option *option)
{
struct pnp_port * port;
port = kcalloc(1, 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);
return;
}
static void
pnpbios_parse_fixed_port_option(unsigned char *p, int size, struct pnp_option *option)
{
struct pnp_port * port;
port = kcalloc(1, 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);
return;
}
static 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';
return;
}
//
#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 = 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;
}
