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];
+}
+