diff options
Diffstat (limited to 'drivers/pnp/pnpbios/rsparser.c')
| -rw-r--r-- | drivers/pnp/pnpbios/rsparser.c | 795 |
1 files changed, 795 insertions, 0 deletions
diff --git a/drivers/pnp/pnpbios/rsparser.c b/drivers/pnp/pnpbios/rsparser.c new file mode 100644 index 0000000..618ac15 --- /dev/null +++ b/drivers/pnp/pnpbios/rsparser.c @@ -0,0 +1,795 @@ +/* + * rsparser.c - parses and encodes pnpbios resource data streams + * + */ + +#include <linux/config.h> +#include <linux/ctype.h> +#include <linux/pnp.h> +#include <linux/pnpbios.h> + +#ifdef CONFIG_PCI +#include <linux/pci.h> +#else +inline void pcibios_penalize_isa_irq(int irq) {} +#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); + } +} + +static void +pnpbios_parse_allocated_dmaresource(struct pnp_resource_table * res, int dma) +{ + int i = 0; + while (!(res->dma_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_DMA) 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 = pnpbios_kmalloc(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 = pnpbios_kmalloc(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 = pnpbios_kmalloc(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 = pnpbios_kmalloc(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 = pnpbios_kmalloc(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 = pnpbios_kmalloc(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 = pnpbios_kmalloc(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: + if (option_independent != option) + printk(KERN_WARNING "PnPBIOS: Missing SMALL_TAG_ENDDEP tag\n"); + 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; +} + + +/* + * 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 = pnpbios_kmalloc(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; +} |
