811 lines
17 KiB
C
811 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* rsparser.c - parses and encodes pnpbios resource data streams
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*/
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#include <linux/ctype.h>
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#include <linux/pnp.h>
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#include <linux/string.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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{
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}
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#endif /* CONFIG_PCI */
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#include "../base.h"
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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 pnpbios_parse_allocated_ioresource(struct pnp_dev *dev,
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int start, int len)
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{
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int flags = 0;
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int end = start + len - 1;
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if (len <= 0 || end >= 0x10003)
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flags |= IORESOURCE_DISABLED;
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pnp_add_io_resource(dev, start, end, flags);
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}
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static void pnpbios_parse_allocated_memresource(struct pnp_dev *dev,
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int start, int len)
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{
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int flags = 0;
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int end = start + len - 1;
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if (len <= 0)
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flags |= IORESOURCE_DISABLED;
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pnp_add_mem_resource(dev, start, end, flags);
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}
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static unsigned char *pnpbios_parse_allocated_resource_data(struct pnp_dev *dev,
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unsigned char *p,
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unsigned char *end)
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{
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unsigned int len, tag;
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int io, size, mask, i, flags;
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if (!p)
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return NULL;
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pnp_dbg(&dev->dev, "parse allocated resources\n");
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pnp_init_resources(dev);
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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(dev, 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(dev, 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(dev, 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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flags = 0;
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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)
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io = i;
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if (io != -1)
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pcibios_penalize_isa_irq(io, 1);
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else
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flags = IORESOURCE_DISABLED;
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pnp_add_irq_resource(dev, io, flags);
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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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flags = 0;
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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)
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io = i;
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if (io == -1)
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flags = IORESOURCE_DISABLED;
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pnp_add_dma_resource(dev, io, flags);
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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(dev, 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(dev, 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 unknown tag */
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len_err:
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dev_err(&dev->dev, "unknown tag %#x length %d\n",
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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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dev_err(&dev->dev, "no end tag in resource structure\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 __init void pnpbios_parse_mem_option(struct pnp_dev *dev,
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unsigned char *p, int size,
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unsigned int option_flags)
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{
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resource_size_t min, max, align, len;
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unsigned char flags;
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min = ((p[5] << 8) | p[4]) << 8;
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max = ((p[7] << 8) | p[6]) << 8;
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align = (p[9] << 8) | p[8];
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len = ((p[11] << 8) | p[10]) << 8;
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flags = p[3];
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pnp_register_mem_resource(dev, option_flags, min, max, align, len,
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flags);
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}
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static __init void pnpbios_parse_mem32_option(struct pnp_dev *dev,
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unsigned char *p, int size,
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unsigned int option_flags)
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{
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resource_size_t min, max, align, len;
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unsigned char flags;
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min = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4];
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max = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
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align = (p[15] << 24) | (p[14] << 16) | (p[13] << 8) | p[12];
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len = (p[19] << 24) | (p[18] << 16) | (p[17] << 8) | p[16];
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flags = p[3];
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pnp_register_mem_resource(dev, option_flags, min, max, align, len,
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flags);
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}
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static __init void pnpbios_parse_fixed_mem32_option(struct pnp_dev *dev,
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unsigned char *p, int size,
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unsigned int option_flags)
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{
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resource_size_t base, len;
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unsigned char flags;
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base = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4];
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len = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
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flags = p[3];
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pnp_register_mem_resource(dev, option_flags, base, base, 0, len, flags);
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}
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static __init void pnpbios_parse_irq_option(struct pnp_dev *dev,
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unsigned char *p, int size,
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unsigned int option_flags)
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{
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unsigned long bits;
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pnp_irq_mask_t map;
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unsigned char flags = IORESOURCE_IRQ_HIGHEDGE;
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bits = (p[2] << 8) | p[1];
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bitmap_zero(map.bits, PNP_IRQ_NR);
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bitmap_copy(map.bits, &bits, 16);
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if (size > 2)
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flags = p[3];
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pnp_register_irq_resource(dev, option_flags, &map, flags);
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}
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static __init void pnpbios_parse_dma_option(struct pnp_dev *dev,
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unsigned char *p, int size,
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unsigned int option_flags)
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{
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pnp_register_dma_resource(dev, option_flags, p[1], p[2]);
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}
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static __init void pnpbios_parse_port_option(struct pnp_dev *dev,
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unsigned char *p, int size,
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unsigned int option_flags)
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{
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resource_size_t min, max, align, len;
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unsigned char flags;
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min = (p[3] << 8) | p[2];
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max = (p[5] << 8) | p[4];
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align = p[6];
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len = p[7];
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flags = p[1] ? IORESOURCE_IO_16BIT_ADDR : 0;
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pnp_register_port_resource(dev, option_flags, min, max, align, len,
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flags);
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}
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static __init void pnpbios_parse_fixed_port_option(struct pnp_dev *dev,
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unsigned char *p, int size,
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unsigned int option_flags)
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{
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resource_size_t base, len;
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base = (p[2] << 8) | p[1];
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len = p[3];
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pnp_register_port_resource(dev, option_flags, base, base, 0, len,
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IORESOURCE_IO_FIXED);
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}
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static __init unsigned char *
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pnpbios_parse_resource_option_data(unsigned char *p, unsigned char *end,
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struct pnp_dev *dev)
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{
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unsigned int len, tag;
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int priority;
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unsigned int option_flags;
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if (!p)
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return NULL;
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pnp_dbg(&dev->dev, "parse resource options\n");
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option_flags = 0;
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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(dev, p, len, option_flags);
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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(dev, p, len, option_flags);
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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(dev, p, len,
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option_flags);
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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(dev, p, len, option_flags);
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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(dev, p, len, option_flags);
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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(dev, p, len, option_flags);
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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(dev, p, len,
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option_flags);
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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 = PNP_RES_PRIORITY_ACCEPTABLE;
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if (len > 0)
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priority = p[1];
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option_flags = pnp_new_dependent_set(dev, priority);
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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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option_flags = 0;
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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 unknown tag */
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len_err:
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dev_err(&dev->dev, "unknown tag %#x length %d\n",
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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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dev_err(&dev->dev, "no end tag in resource structure\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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static unsigned char *pnpbios_parse_compatible_ids(unsigned char *p,
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unsigned char *end,
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struct pnp_dev *dev)
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{
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int len, tag;
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u32 eisa_id;
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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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|
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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:
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strncpy(dev->name, p + 3,
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len >= PNP_NAME_LEN ? PNP_NAME_LEN - 2 : len);
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dev->name[len >=
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PNP_NAME_LEN ? PNP_NAME_LEN - 1 : len] = '\0';
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break;
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case SMALL_TAG_COMPATDEVID: /* compatible ID */
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if (len != 4)
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goto len_err;
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eisa_id = p[1] | p[2] << 8 | p[3] << 16 | p[4] << 24;
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pnp_eisa_id_to_string(eisa_id & PNP_EISA_ID_MASK, id);
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dev_id = pnp_add_id(dev, id);
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if (!dev_id)
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return NULL;
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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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|
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default: /* an unknown tag */
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len_err:
|
|
dev_err(&dev->dev, "unknown tag %#x length %d\n",
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tag, len);
|
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break;
|
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}
|
|
|
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/* continue to the next tag */
|
|
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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dev_err(&dev->dev, "no end tag in resource structure\n");
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|
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Allocated Resource Encoding
|
|
*/
|
|
|
|
static void pnpbios_encode_mem(struct pnp_dev *dev, unsigned char *p,
|
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struct resource *res)
|
|
{
|
|
unsigned long base;
|
|
unsigned long len;
|
|
|
|
if (pnp_resource_enabled(res)) {
|
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base = res->start;
|
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len = resource_size(res);
|
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} else {
|
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base = 0;
|
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len = 0;
|
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}
|
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|
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p[4] = (base >> 8) & 0xff;
|
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p[5] = ((base >> 8) >> 8) & 0xff;
|
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p[6] = (base >> 8) & 0xff;
|
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p[7] = ((base >> 8) >> 8) & 0xff;
|
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p[10] = (len >> 8) & 0xff;
|
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p[11] = ((len >> 8) >> 8) & 0xff;
|
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|
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pnp_dbg(&dev->dev, " encode mem %#lx-%#lx\n", base, base + len - 1);
|
|
}
|
|
|
|
static void pnpbios_encode_mem32(struct pnp_dev *dev, unsigned char *p,
|
|
struct resource *res)
|
|
{
|
|
unsigned long base;
|
|
unsigned long len;
|
|
|
|
if (pnp_resource_enabled(res)) {
|
|
base = res->start;
|
|
len = resource_size(res);
|
|
} else {
|
|
base = 0;
|
|
len = 0;
|
|
}
|
|
|
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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;
|
|
|
|
pnp_dbg(&dev->dev, " encode mem32 %#lx-%#lx\n", base, base + len - 1);
|
|
}
|
|
|
|
static void pnpbios_encode_fixed_mem32(struct pnp_dev *dev, unsigned char *p,
|
|
struct resource *res)
|
|
{
|
|
unsigned long base;
|
|
unsigned long len;
|
|
|
|
if (pnp_resource_enabled(res)) {
|
|
base = res->start;
|
|
len = resource_size(res);
|
|
} else {
|
|
base = 0;
|
|
len = 0;
|
|
}
|
|
|
|
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;
|
|
|
|
pnp_dbg(&dev->dev, " encode fixed_mem32 %#lx-%#lx\n", base,
|
|
base + len - 1);
|
|
}
|
|
|
|
static void pnpbios_encode_irq(struct pnp_dev *dev, unsigned char *p,
|
|
struct resource *res)
|
|
{
|
|
unsigned long map;
|
|
|
|
if (pnp_resource_enabled(res))
|
|
map = 1 << res->start;
|
|
else
|
|
map = 0;
|
|
|
|
p[1] = map & 0xff;
|
|
p[2] = (map >> 8) & 0xff;
|
|
|
|
pnp_dbg(&dev->dev, " encode irq mask %#lx\n", map);
|
|
}
|
|
|
|
static void pnpbios_encode_dma(struct pnp_dev *dev, unsigned char *p,
|
|
struct resource *res)
|
|
{
|
|
unsigned long map;
|
|
|
|
if (pnp_resource_enabled(res))
|
|
map = 1 << res->start;
|
|
else
|
|
map = 0;
|
|
|
|
p[1] = map & 0xff;
|
|
|
|
pnp_dbg(&dev->dev, " encode dma mask %#lx\n", map);
|
|
}
|
|
|
|
static void pnpbios_encode_port(struct pnp_dev *dev, unsigned char *p,
|
|
struct resource *res)
|
|
{
|
|
unsigned long base;
|
|
unsigned long len;
|
|
|
|
if (pnp_resource_enabled(res)) {
|
|
base = res->start;
|
|
len = resource_size(res);
|
|
} else {
|
|
base = 0;
|
|
len = 0;
|
|
}
|
|
|
|
p[2] = base & 0xff;
|
|
p[3] = (base >> 8) & 0xff;
|
|
p[4] = base & 0xff;
|
|
p[5] = (base >> 8) & 0xff;
|
|
p[7] = len & 0xff;
|
|
|
|
pnp_dbg(&dev->dev, " encode io %#lx-%#lx\n", base, base + len - 1);
|
|
}
|
|
|
|
static void pnpbios_encode_fixed_port(struct pnp_dev *dev, unsigned char *p,
|
|
struct resource *res)
|
|
{
|
|
unsigned long base = res->start;
|
|
unsigned long len = resource_size(res);
|
|
|
|
if (pnp_resource_enabled(res)) {
|
|
base = res->start;
|
|
len = resource_size(res);
|
|
} else {
|
|
base = 0;
|
|
len = 0;
|
|
}
|
|
|
|
p[1] = base & 0xff;
|
|
p[2] = (base >> 8) & 0xff;
|
|
p[3] = len & 0xff;
|
|
|
|
pnp_dbg(&dev->dev, " encode fixed_io %#lx-%#lx\n", base,
|
|
base + len - 1);
|
|
}
|
|
|
|
static unsigned char *pnpbios_encode_allocated_resource_data(struct pnp_dev
|
|
*dev,
|
|
unsigned char *p,
|
|
unsigned char *end)
|
|
{
|
|
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(dev, p,
|
|
pnp_get_resource(dev, IORESOURCE_MEM, mem));
|
|
mem++;
|
|
break;
|
|
|
|
case LARGE_TAG_MEM32:
|
|
if (len != 17)
|
|
goto len_err;
|
|
pnpbios_encode_mem32(dev, p,
|
|
pnp_get_resource(dev, IORESOURCE_MEM, mem));
|
|
mem++;
|
|
break;
|
|
|
|
case LARGE_TAG_FIXEDMEM32:
|
|
if (len != 9)
|
|
goto len_err;
|
|
pnpbios_encode_fixed_mem32(dev, p,
|
|
pnp_get_resource(dev, IORESOURCE_MEM, mem));
|
|
mem++;
|
|
break;
|
|
|
|
case SMALL_TAG_IRQ:
|
|
if (len < 2 || len > 3)
|
|
goto len_err;
|
|
pnpbios_encode_irq(dev, p,
|
|
pnp_get_resource(dev, IORESOURCE_IRQ, irq));
|
|
irq++;
|
|
break;
|
|
|
|
case SMALL_TAG_DMA:
|
|
if (len != 2)
|
|
goto len_err;
|
|
pnpbios_encode_dma(dev, p,
|
|
pnp_get_resource(dev, IORESOURCE_DMA, dma));
|
|
dma++;
|
|
break;
|
|
|
|
case SMALL_TAG_PORT:
|
|
if (len != 7)
|
|
goto len_err;
|
|
pnpbios_encode_port(dev, p,
|
|
pnp_get_resource(dev, IORESOURCE_IO, port));
|
|
port++;
|
|
break;
|
|
|
|
case SMALL_TAG_VENDOR:
|
|
/* do nothing */
|
|
break;
|
|
|
|
case SMALL_TAG_FIXEDPORT:
|
|
if (len != 3)
|
|
goto len_err;
|
|
pnpbios_encode_fixed_port(dev, p,
|
|
pnp_get_resource(dev, IORESOURCE_IO, port));
|
|
port++;
|
|
break;
|
|
|
|
case SMALL_TAG_END:
|
|
p = p + 2;
|
|
return (unsigned char *)p;
|
|
break;
|
|
|
|
default: /* an unknown tag */
|
|
len_err:
|
|
dev_err(&dev->dev, "unknown tag %#x length %d\n",
|
|
tag, len);
|
|
break;
|
|
}
|
|
|
|
/* continue to the next tag */
|
|
if (p[0] & LARGE_TAG)
|
|
p += len + 3;
|
|
else
|
|
p += len + 1;
|
|
}
|
|
|
|
dev_err(&dev->dev, "no end tag in resource structure\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(dev, p, end);
|
|
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_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(dev, p, end);
|
|
if (!p)
|
|
return -EIO;
|
|
return 0;
|
|
}
|
|
|
|
int pnpbios_write_resources_to_node(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_encode_allocated_resource_data(dev, p, end);
|
|
if (!p)
|
|
return -EIO;
|
|
return 0;
|
|
}
|