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Diffstat (limited to 'arch/i386/kernel/dmi_scan.c')
-rw-r--r--arch/i386/kernel/dmi_scan.c487
1 files changed, 487 insertions, 0 deletions
diff --git a/arch/i386/kernel/dmi_scan.c b/arch/i386/kernel/dmi_scan.c
new file mode 100644
index 000000000000..6ed7e28f306c
--- /dev/null
+++ b/arch/i386/kernel/dmi_scan.c
@@ -0,0 +1,487 @@
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/acpi.h>
+#include <asm/io.h>
+#include <linux/pm.h>
+#include <asm/system.h>
+#include <linux/dmi.h>
+#include <linux/bootmem.h>
+
+
+struct dmi_header
+{
+ u8 type;
+ u8 length;
+ u16 handle;
+};
+
+#undef DMI_DEBUG
+
+#ifdef DMI_DEBUG
+#define dmi_printk(x) printk x
+#else
+#define dmi_printk(x)
+#endif
+
+static char * __init dmi_string(struct dmi_header *dm, u8 s)
+{
+ u8 *bp=(u8 *)dm;
+ bp+=dm->length;
+ if(!s)
+ return "";
+ s--;
+ while(s>0 && *bp)
+ {
+ bp+=strlen(bp);
+ bp++;
+ s--;
+ }
+ return bp;
+}
+
+/*
+ * We have to be cautious here. We have seen BIOSes with DMI pointers
+ * pointing to completely the wrong place for example
+ */
+
+static int __init dmi_table(u32 base, int len, int num, void (*decode)(struct dmi_header *))
+{
+ u8 *buf;
+ struct dmi_header *dm;
+ u8 *data;
+ int i=0;
+
+ buf = bt_ioremap(base, len);
+ if(buf==NULL)
+ return -1;
+
+ data = buf;
+
+ /*
+ * Stop when we see all the items the table claimed to have
+ * OR we run off the end of the table (also happens)
+ */
+
+ while(i<num && data-buf+sizeof(struct dmi_header)<=len)
+ {
+ dm=(struct dmi_header *)data;
+ /*
+ * We want to know the total length (formated area and strings)
+ * before decoding to make sure we won't run off the table in
+ * dmi_decode or dmi_string
+ */
+ data+=dm->length;
+ while(data-buf<len-1 && (data[0] || data[1]))
+ data++;
+ if(data-buf<len-1)
+ decode(dm);
+ data+=2;
+ i++;
+ }
+ bt_iounmap(buf, len);
+ return 0;
+}
+
+
+inline static int __init dmi_checksum(u8 *buf)
+{
+ u8 sum=0;
+ int a;
+
+ for(a=0; a<15; a++)
+ sum+=buf[a];
+ return (sum==0);
+}
+
+static int __init dmi_iterate(void (*decode)(struct dmi_header *))
+{
+ u8 buf[15];
+ char __iomem *p, *q;
+
+ /*
+ * no iounmap() for that ioremap(); it would be a no-op, but it's
+ * so early in setup that sucker gets confused into doing what
+ * it shouldn't if we actually call it.
+ */
+ p = ioremap(0xF0000, 0x10000);
+ if (p == NULL)
+ return -1;
+ for (q = p; q < p + 0x10000; q += 16) {
+ memcpy_fromio(buf, q, 15);
+ if(memcmp(buf, "_DMI_", 5)==0 && dmi_checksum(buf))
+ {
+ u16 num=buf[13]<<8|buf[12];
+ u16 len=buf[7]<<8|buf[6];
+ u32 base=buf[11]<<24|buf[10]<<16|buf[9]<<8|buf[8];
+
+ /*
+ * DMI version 0.0 means that the real version is taken from
+ * the SMBIOS version, which we don't know at this point.
+ */
+ if(buf[14]!=0)
+ printk(KERN_INFO "DMI %d.%d present.\n",
+ buf[14]>>4, buf[14]&0x0F);
+ else
+ printk(KERN_INFO "DMI present.\n");
+ dmi_printk((KERN_INFO "%d structures occupying %d bytes.\n",
+ num, len));
+ dmi_printk((KERN_INFO "DMI table at 0x%08X.\n",
+ base));
+ if(dmi_table(base,len, num, decode)==0)
+ return 0;
+ }
+ }
+ return -1;
+}
+
+static char *dmi_ident[DMI_STRING_MAX];
+
+/*
+ * Save a DMI string
+ */
+
+static void __init dmi_save_ident(struct dmi_header *dm, int slot, int string)
+{
+ char *d = (char*)dm;
+ char *p = dmi_string(dm, d[string]);
+ if(p==NULL || *p == 0)
+ return;
+ if (dmi_ident[slot])
+ return;
+ dmi_ident[slot] = alloc_bootmem(strlen(p)+1);
+ if(dmi_ident[slot])
+ strcpy(dmi_ident[slot], p);
+ else
+ printk(KERN_ERR "dmi_save_ident: out of memory.\n");
+}
+
+/*
+ * Ugly compatibility crap.
+ */
+#define dmi_blacklist dmi_system_id
+#define NO_MATCH { DMI_NONE, NULL}
+#define MATCH DMI_MATCH
+
+/*
+ * Toshiba keyboard likes to repeat keys when they are not repeated.
+ */
+
+static __init int broken_toshiba_keyboard(struct dmi_blacklist *d)
+{
+ printk(KERN_WARNING "Toshiba with broken keyboard detected. If your keyboard sometimes generates 3 keypresses instead of one, see http://davyd.ucc.asn.au/projects/toshiba/README\n");
+ return 0;
+}
+
+
+#ifdef CONFIG_ACPI_SLEEP
+static __init int reset_videomode_after_s3(struct dmi_blacklist *d)
+{
+ /* See acpi_wakeup.S */
+ extern long acpi_video_flags;
+ acpi_video_flags |= 2;
+ return 0;
+}
+#endif
+
+
+#ifdef CONFIG_ACPI_BOOT
+extern int acpi_force;
+
+static __init __attribute__((unused)) int dmi_disable_acpi(struct dmi_blacklist *d)
+{
+ if (!acpi_force) {
+ printk(KERN_NOTICE "%s detected: acpi off\n",d->ident);
+ disable_acpi();
+ } else {
+ printk(KERN_NOTICE
+ "Warning: DMI blacklist says broken, but acpi forced\n");
+ }
+ return 0;
+}
+
+/*
+ * Limit ACPI to CPU enumeration for HT
+ */
+static __init __attribute__((unused)) int force_acpi_ht(struct dmi_blacklist *d)
+{
+ if (!acpi_force) {
+ printk(KERN_NOTICE "%s detected: force use of acpi=ht\n", d->ident);
+ disable_acpi();
+ acpi_ht = 1;
+ } else {
+ printk(KERN_NOTICE
+ "Warning: acpi=force overrules DMI blacklist: acpi=ht\n");
+ }
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_ACPI_PCI
+static __init int disable_acpi_irq(struct dmi_blacklist *d)
+{
+ if (!acpi_force) {
+ printk(KERN_NOTICE "%s detected: force use of acpi=noirq\n",
+ d->ident);
+ acpi_noirq_set();
+ }
+ return 0;
+}
+static __init int disable_acpi_pci(struct dmi_blacklist *d)
+{
+ if (!acpi_force) {
+ printk(KERN_NOTICE "%s detected: force use of pci=noacpi\n",
+ d->ident);
+ acpi_disable_pci();
+ }
+ return 0;
+}
+#endif
+
+/*
+ * Process the DMI blacklists
+ */
+
+
+/*
+ * This will be expanded over time to force things like the APM
+ * interrupt mask settings according to the laptop
+ */
+
+static __initdata struct dmi_blacklist dmi_blacklist[]={
+
+ { broken_toshiba_keyboard, "Toshiba Satellite 4030cdt", { /* Keyboard generates spurious repeats */
+ MATCH(DMI_PRODUCT_NAME, "S4030CDT/4.3"),
+ NO_MATCH, NO_MATCH, NO_MATCH
+ } },
+#ifdef CONFIG_ACPI_SLEEP
+ { reset_videomode_after_s3, "Toshiba Satellite 4030cdt", { /* Reset video mode after returning from ACPI S3 sleep */
+ MATCH(DMI_PRODUCT_NAME, "S4030CDT/4.3"),
+ NO_MATCH, NO_MATCH, NO_MATCH
+ } },
+#endif
+
+#ifdef CONFIG_ACPI_BOOT
+ /*
+ * If your system is blacklisted here, but you find that acpi=force
+ * works for you, please contact acpi-devel@sourceforge.net
+ */
+
+ /*
+ * Boxes that need ACPI disabled
+ */
+
+ { dmi_disable_acpi, "IBM Thinkpad", {
+ MATCH(DMI_BOARD_VENDOR, "IBM"),
+ MATCH(DMI_BOARD_NAME, "2629H1G"),
+ NO_MATCH, NO_MATCH }},
+
+ /*
+ * Boxes that need acpi=ht
+ */
+
+ { force_acpi_ht, "FSC Primergy T850", {
+ MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
+ MATCH(DMI_PRODUCT_NAME, "PRIMERGY T850"),
+ NO_MATCH, NO_MATCH }},
+
+ { force_acpi_ht, "DELL GX240", {
+ MATCH(DMI_BOARD_VENDOR, "Dell Computer Corporation"),
+ MATCH(DMI_BOARD_NAME, "OptiPlex GX240"),
+ NO_MATCH, NO_MATCH }},
+
+ { force_acpi_ht, "HP VISUALIZE NT Workstation", {
+ MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
+ MATCH(DMI_PRODUCT_NAME, "HP VISUALIZE NT Workstation"),
+ NO_MATCH, NO_MATCH }},
+
+ { force_acpi_ht, "Compaq Workstation W8000", {
+ MATCH(DMI_SYS_VENDOR, "Compaq"),
+ MATCH(DMI_PRODUCT_NAME, "Workstation W8000"),
+ NO_MATCH, NO_MATCH }},
+
+ { force_acpi_ht, "ASUS P4B266", {
+ MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+ MATCH(DMI_BOARD_NAME, "P4B266"),
+ NO_MATCH, NO_MATCH }},
+
+ { force_acpi_ht, "ASUS P2B-DS", {
+ MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+ MATCH(DMI_BOARD_NAME, "P2B-DS"),
+ NO_MATCH, NO_MATCH }},
+
+ { force_acpi_ht, "ASUS CUR-DLS", {
+ MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+ MATCH(DMI_BOARD_NAME, "CUR-DLS"),
+ NO_MATCH, NO_MATCH }},
+
+ { force_acpi_ht, "ABIT i440BX-W83977", {
+ MATCH(DMI_BOARD_VENDOR, "ABIT <http://www.abit.com>"),
+ MATCH(DMI_BOARD_NAME, "i440BX-W83977 (BP6)"),
+ NO_MATCH, NO_MATCH }},
+
+ { force_acpi_ht, "IBM Bladecenter", {
+ MATCH(DMI_BOARD_VENDOR, "IBM"),
+ MATCH(DMI_BOARD_NAME, "IBM eServer BladeCenter HS20"),
+ NO_MATCH, NO_MATCH }},
+
+ { force_acpi_ht, "IBM eServer xSeries 360", {
+ MATCH(DMI_BOARD_VENDOR, "IBM"),
+ MATCH(DMI_BOARD_NAME, "eServer xSeries 360"),
+ NO_MATCH, NO_MATCH }},
+
+ { force_acpi_ht, "IBM eserver xSeries 330", {
+ MATCH(DMI_BOARD_VENDOR, "IBM"),
+ MATCH(DMI_BOARD_NAME, "eserver xSeries 330"),
+ NO_MATCH, NO_MATCH }},
+
+ { force_acpi_ht, "IBM eserver xSeries 440", {
+ MATCH(DMI_BOARD_VENDOR, "IBM"),
+ MATCH(DMI_PRODUCT_NAME, "eserver xSeries 440"),
+ NO_MATCH, NO_MATCH }},
+
+#endif // CONFIG_ACPI_BOOT
+
+#ifdef CONFIG_ACPI_PCI
+ /*
+ * Boxes that need ACPI PCI IRQ routing disabled
+ */
+
+ { disable_acpi_irq, "ASUS A7V", {
+ MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC"),
+ MATCH(DMI_BOARD_NAME, "<A7V>"),
+ /* newer BIOS, Revision 1011, does work */
+ MATCH(DMI_BIOS_VERSION, "ASUS A7V ACPI BIOS Revision 1007"),
+ NO_MATCH }},
+
+ /*
+ * Boxes that need ACPI PCI IRQ routing and PCI scan disabled
+ */
+ { disable_acpi_pci, "ASUS PR-DLS", { /* _BBN 0 bug */
+ MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+ MATCH(DMI_BOARD_NAME, "PR-DLS"),
+ MATCH(DMI_BIOS_VERSION, "ASUS PR-DLS ACPI BIOS Revision 1010"),
+ MATCH(DMI_BIOS_DATE, "03/21/2003") }},
+
+ { disable_acpi_pci, "Acer TravelMate 36x Laptop", {
+ MATCH(DMI_SYS_VENDOR, "Acer"),
+ MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
+ NO_MATCH, NO_MATCH
+ } },
+
+#endif
+
+ { NULL, }
+};
+
+/*
+ * Process a DMI table entry. Right now all we care about are the BIOS
+ * and machine entries. For 2.5 we should pull the smbus controller info
+ * out of here.
+ */
+
+static void __init dmi_decode(struct dmi_header *dm)
+{
+#ifdef DMI_DEBUG
+ u8 *data = (u8 *)dm;
+#endif
+
+ switch(dm->type)
+ {
+ case 0:
+ dmi_printk(("BIOS Vendor: %s\n",
+ dmi_string(dm, data[4])));
+ dmi_save_ident(dm, DMI_BIOS_VENDOR, 4);
+ dmi_printk(("BIOS Version: %s\n",
+ dmi_string(dm, data[5])));
+ dmi_save_ident(dm, DMI_BIOS_VERSION, 5);
+ dmi_printk(("BIOS Release: %s\n",
+ dmi_string(dm, data[8])));
+ dmi_save_ident(dm, DMI_BIOS_DATE, 8);
+ break;
+ case 1:
+ dmi_printk(("System Vendor: %s\n",
+ dmi_string(dm, data[4])));
+ dmi_save_ident(dm, DMI_SYS_VENDOR, 4);
+ dmi_printk(("Product Name: %s\n",
+ dmi_string(dm, data[5])));
+ dmi_save_ident(dm, DMI_PRODUCT_NAME, 5);
+ dmi_printk(("Version: %s\n",
+ dmi_string(dm, data[6])));
+ dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6);
+ dmi_printk(("Serial Number: %s\n",
+ dmi_string(dm, data[7])));
+ break;
+ case 2:
+ dmi_printk(("Board Vendor: %s\n",
+ dmi_string(dm, data[4])));
+ dmi_save_ident(dm, DMI_BOARD_VENDOR, 4);
+ dmi_printk(("Board Name: %s\n",
+ dmi_string(dm, data[5])));
+ dmi_save_ident(dm, DMI_BOARD_NAME, 5);
+ dmi_printk(("Board Version: %s\n",
+ dmi_string(dm, data[6])));
+ dmi_save_ident(dm, DMI_BOARD_VERSION, 6);
+ break;
+ }
+}
+
+void __init dmi_scan_machine(void)
+{
+ int err = dmi_iterate(dmi_decode);
+ if(err == 0)
+ dmi_check_system(dmi_blacklist);
+ else
+ printk(KERN_INFO "DMI not present.\n");
+}
+
+
+/**
+ * dmi_check_system - check system DMI data
+ * @list: array of dmi_system_id structures to match against
+ *
+ * Walk the blacklist table running matching functions until someone
+ * returns non zero or we hit the end. Callback function is called for
+ * each successfull match. Returns the number of matches.
+ */
+int dmi_check_system(struct dmi_system_id *list)
+{
+ int i, count = 0;
+ struct dmi_system_id *d = list;
+
+ while (d->ident) {
+ for (i = 0; i < ARRAY_SIZE(d->matches); i++) {
+ int s = d->matches[i].slot;
+ if (s == DMI_NONE)
+ continue;
+ if (dmi_ident[s] && strstr(dmi_ident[s], d->matches[i].substr))
+ continue;
+ /* No match */
+ goto fail;
+ }
+ if (d->callback && d->callback(d))
+ break;
+ count++;
+fail: d++;
+ }
+
+ return count;
+}
+
+EXPORT_SYMBOL(dmi_check_system);
+
+/**
+ * dmi_get_system_info - return DMI data value
+ * @field: data index (see enum dmi_filed)
+ *
+ * Returns one DMI data value, can be used to perform
+ * complex DMI data checks.
+ */
+char * dmi_get_system_info(int field)
+{
+ return dmi_ident[field];
+}
+