X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=drivers%2Fchar%2Fi8k.c;h=f3c3aaf4560e86d07161fb2b8255882c9bf74599;hb=e815de422c1dc2fe787c6f3edba81f3cf0176e32;hp=bf5e43beca62434a47c619943bd6206e1ef33132;hpb=dec63ec32ea486ab915138e8790084c22a3f7bf6;p=powerpc.git

diff --git a/drivers/char/i8k.c b/drivers/char/i8k.c
index bf5e43beca..f3c3aaf456 100644
--- a/drivers/char/i8k.c
+++ b/drivers/char/i8k.c
@@ -20,13 +20,14 @@
 #include <linux/types.h>
 #include <linux/init.h>
 #include <linux/proc_fs.h>
-#include <linux/apm_bios.h>
+#include <linux/seq_file.h>
+#include <linux/dmi.h>
 #include <asm/uaccess.h>
 #include <asm/io.h>
 
 #include <linux/i8k.h>
 
-#define I8K_VERSION		"1.13 14/05/2002"
+#define I8K_VERSION		"1.14 21/02/2005"
 
 #define I8K_SMM_FN_STATUS	0x0025
 #define I8K_SMM_POWER_STATUS	0x0069
@@ -34,7 +35,8 @@
 #define I8K_SMM_GET_FAN		0x00a3
 #define I8K_SMM_GET_SPEED	0x02a3
 #define I8K_SMM_GET_TEMP	0x10a3
-#define I8K_SMM_GET_DELL_SIG	0xffa3
+#define I8K_SMM_GET_DELL_SIG1	0xfea3
+#define I8K_SMM_GET_DELL_SIG2	0xffa3
 #define I8K_SMM_BIOS_VERSION	0x00a6
 
 #define I8K_FAN_MULT		30
@@ -52,18 +54,7 @@
 
 #define I8K_TEMPERATURE_BUG	1
 
-#define DELL_SIGNATURE		"Dell Computer"
-
-static char *supported_models[] = {
-	"Inspiron",
-	"Latitude",
-	NULL
-};
-
-static char system_vendor[48] = "?";
-static char product_name[48] = "?";
-static char bios_version[4] = "?";
-static char serial_number[16] = "?";
+static char bios_version[4];
 
 MODULE_AUTHOR("Massimo Dal Zotto (dz@debian.org)");
 MODULE_DESCRIPTION("Driver for accessing SMM BIOS on Dell laptops");
@@ -73,6 +64,10 @@ static int force;
 module_param(force, bool, 0);
 MODULE_PARM_DESC(force, "Force loading without checking for supported models");
 
+static int ignore_dmi;
+module_param(ignore_dmi, bool, 0);
+MODULE_PARM_DESC(ignore_dmi, "Continue probing hardware even if DMI data does not match");
+
 static int restricted;
 module_param(restricted, bool, 0);
 MODULE_PARM_DESC(restricted, "Allow fan control if SYS_ADMIN capability set");
@@ -81,34 +76,38 @@ static int power_status;
 module_param(power_status, bool, 0600);
 MODULE_PARM_DESC(power_status, "Report power status in /proc/i8k");
 
-static ssize_t i8k_read(struct file *, char __user *, size_t, loff_t *);
+static int i8k_open_fs(struct inode *inode, struct file *file);
 static int i8k_ioctl(struct inode *, struct file *, unsigned int,
 		     unsigned long);
 
 static struct file_operations i8k_fops = {
-	.read = i8k_read,
-	.ioctl = i8k_ioctl,
+	.open		= i8k_open_fs,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+	.ioctl		= i8k_ioctl,
 };
 
-typedef struct {
+struct smm_regs {
 	unsigned int eax;
 	unsigned int ebx __attribute__ ((packed));
 	unsigned int ecx __attribute__ ((packed));
 	unsigned int edx __attribute__ ((packed));
 	unsigned int esi __attribute__ ((packed));
 	unsigned int edi __attribute__ ((packed));
-} SMMRegisters;
+};
 
-typedef struct {
-	u8 type;
-	u8 length;
-	u16 handle;
-} DMIHeader;
+static inline char *i8k_get_dmi_data(int field)
+{
+	char *dmi_data = dmi_get_system_info(field);
+
+	return dmi_data && *dmi_data ? dmi_data : "?";
+}
 
 /*
  * Call the System Management Mode BIOS. Code provided by Jonathan Buzzard.
  */
-static int i8k_smm(SMMRegisters * regs)
+static int i8k_smm(struct smm_regs *regs)
 {
 	int rc;
 	int eax = regs->eax;
@@ -138,9 +137,8 @@ static int i8k_smm(SMMRegisters * regs)
 	    :    "a"(regs)
 	    :    "%ebx", "%ecx", "%edx", "%esi", "%edi", "memory");
 
-	if ((rc != 0) || ((regs->eax & 0xffff) == 0xffff) || (regs->eax == eax)) {
+	if (rc != 0 || (regs->eax & 0xffff) == 0xffff || regs->eax == eax)
 		return -EINVAL;
-	}
 
 	return 0;
 }
@@ -151,24 +149,9 @@ static int i8k_smm(SMMRegisters * regs)
  */
 static int i8k_get_bios_version(void)
 {
-	SMMRegisters regs = { 0, 0, 0, 0, 0, 0 };
-	int rc;
+	struct smm_regs regs = { .eax = I8K_SMM_BIOS_VERSION, };
 
-	regs.eax = I8K_SMM_BIOS_VERSION;
-	if ((rc = i8k_smm(&regs)) < 0) {
-		return rc;
-	}
-
-	return regs.eax;
-}
-
-/*
- * Read the machine id.
- */
-static int i8k_get_serial_number(unsigned char *buff)
-{
-	strlcpy(buff, serial_number, sizeof(serial_number));
-	return 0;
+	return i8k_smm(&regs) ? : regs.eax;
 }
 
 /*
@@ -176,13 +159,11 @@ static int i8k_get_serial_number(unsigned char *buff)
  */
 static int i8k_get_fn_status(void)
 {
-	SMMRegisters regs = { 0, 0, 0, 0, 0, 0 };
+	struct smm_regs regs = { .eax = I8K_SMM_FN_STATUS, };
 	int rc;
 
-	regs.eax = I8K_SMM_FN_STATUS;
-	if ((rc = i8k_smm(&regs)) < 0) {
+	if ((rc = i8k_smm(&regs)) < 0)
 		return rc;
-	}
 
 	switch ((regs.eax >> I8K_FN_SHIFT) & I8K_FN_MASK) {
 	case I8K_FN_UP:
@@ -201,20 +182,13 @@ static int i8k_get_fn_status(void)
  */
 static int i8k_get_power_status(void)
 {
-	SMMRegisters regs = { 0, 0, 0, 0, 0, 0 };
+	struct smm_regs regs = { .eax = I8K_SMM_POWER_STATUS, };
 	int rc;
 
-	regs.eax = I8K_SMM_POWER_STATUS;
-	if ((rc = i8k_smm(&regs)) < 0) {
+	if ((rc = i8k_smm(&regs)) < 0)
 		return rc;
-	}
 
-	switch (regs.eax & 0xff) {
-	case I8K_POWER_AC:
-		return I8K_AC;
-	default:
-		return I8K_BATTERY;
-	}
+	return (regs.eax & 0xff) == I8K_POWER_AC ? I8K_AC : I8K_BATTERY;
 }
 
 /*
@@ -222,16 +196,10 @@ static int i8k_get_power_status(void)
  */
 static int i8k_get_fan_status(int fan)
 {
-	SMMRegisters regs = { 0, 0, 0, 0, 0, 0 };
-	int rc;
+	struct smm_regs regs = { .eax = I8K_SMM_GET_FAN, };
 
-	regs.eax = I8K_SMM_GET_FAN;
 	regs.ebx = fan & 0xff;
-	if ((rc = i8k_smm(&regs)) < 0) {
-		return rc;
-	}
-
-	return (regs.eax & 0xff);
+	return i8k_smm(&regs) ? : regs.eax & 0xff;
 }
 
 /*
@@ -239,16 +207,10 @@ static int i8k_get_fan_status(int fan)
  */
 static int i8k_get_fan_speed(int fan)
 {
-	SMMRegisters regs = { 0, 0, 0, 0, 0, 0 };
-	int rc;
+	struct smm_regs regs = { .eax = I8K_SMM_GET_SPEED, };
 
-	regs.eax = I8K_SMM_GET_SPEED;
 	regs.ebx = fan & 0xff;
-	if ((rc = i8k_smm(&regs)) < 0) {
-		return rc;
-	}
-
-	return (regs.eax & 0xffff) * I8K_FAN_MULT;
+	return i8k_smm(&regs) ? : (regs.eax & 0xffff) * I8K_FAN_MULT;
 }
 
 /*
@@ -256,37 +218,30 @@ static int i8k_get_fan_speed(int fan)
  */
 static int i8k_set_fan(int fan, int speed)
 {
-	SMMRegisters regs = { 0, 0, 0, 0, 0, 0 };
-	int rc;
+	struct smm_regs regs = { .eax = I8K_SMM_SET_FAN, };
 
 	speed = (speed < 0) ? 0 : ((speed > I8K_FAN_MAX) ? I8K_FAN_MAX : speed);
-
-	regs.eax = I8K_SMM_SET_FAN;
 	regs.ebx = (fan & 0xff) | (speed << 8);
-	if ((rc = i8k_smm(&regs)) < 0) {
-		return rc;
-	}
 
-	return (i8k_get_fan_status(fan));
+	return i8k_smm(&regs) ? : i8k_get_fan_status(fan);
 }
 
 /*
  * Read the cpu temperature.
  */
-static int i8k_get_cpu_temp(void)
+static int i8k_get_temp(int sensor)
 {
-	SMMRegisters regs = { 0, 0, 0, 0, 0, 0 };
+	struct smm_regs regs = { .eax = I8K_SMM_GET_TEMP, };
 	int rc;
 	int temp;
 
 #ifdef I8K_TEMPERATURE_BUG
-	static int prev = 0;
+	static int prev;
 #endif
-
-	regs.eax = I8K_SMM_GET_TEMP;
-	if ((rc = i8k_smm(&regs)) < 0) {
+	regs.ebx = sensor & 0xff;
+	if ((rc = i8k_smm(&regs)) < 0)
 		return rc;
-	}
+
 	temp = regs.eax & 0xff;
 
 #ifdef I8K_TEMPERATURE_BUG
@@ -308,27 +263,21 @@ static int i8k_get_cpu_temp(void)
 	return temp;
 }
 
-static int i8k_get_dell_signature(void)
+static int i8k_get_dell_signature(int req_fn)
 {
-	SMMRegisters regs = { 0, 0, 0, 0, 0, 0 };
+	struct smm_regs regs = { .eax = req_fn, };
 	int rc;
 
-	regs.eax = I8K_SMM_GET_DELL_SIG;
-	if ((rc = i8k_smm(&regs)) < 0) {
+	if ((rc = i8k_smm(&regs)) < 0)
 		return rc;
-	}
 
-	if ((regs.eax == 1145651527) && (regs.edx == 1145392204)) {
-		return 0;
-	} else {
-		return -1;
-	}
+	return regs.eax == 1145651527 && regs.edx == 1145392204 ? 0 : -1;
 }
 
 static int i8k_ioctl(struct inode *ip, struct file *fp, unsigned int cmd,
 		     unsigned long arg)
 {
-	int val;
+	int val = 0;
 	int speed;
 	unsigned char buff[16];
 	int __user *argp = (int __user *)arg;
@@ -343,7 +292,7 @@ static int i8k_ioctl(struct inode *ip, struct file *fp, unsigned int cmd,
 
 	case I8K_MACHINE_ID:
 		memset(buff, 0, 16);
-		val = i8k_get_serial_number(buff);
+		strlcpy(buff, i8k_get_dmi_data(DMI_PRODUCT_SERIAL), sizeof(buff));
 		break;
 
 	case I8K_FN_STATUS:
@@ -355,33 +304,33 @@ static int i8k_ioctl(struct inode *ip, struct file *fp, unsigned int cmd,
 		break;
 
 	case I8K_GET_TEMP:
-		val = i8k_get_cpu_temp();
+		val = i8k_get_temp(0);
 		break;
 
 	case I8K_GET_SPEED:
-		if (copy_from_user(&val, argp, sizeof(int))) {
+		if (copy_from_user(&val, argp, sizeof(int)))
 			return -EFAULT;
-		}
+
 		val = i8k_get_fan_speed(val);
 		break;
 
 	case I8K_GET_FAN:
-		if (copy_from_user(&val, argp, sizeof(int))) {
+		if (copy_from_user(&val, argp, sizeof(int)))
 			return -EFAULT;
-		}
+
 		val = i8k_get_fan_status(val);
 		break;
 
 	case I8K_SET_FAN:
-		if (restricted && !capable(CAP_SYS_ADMIN)) {
+		if (restricted && !capable(CAP_SYS_ADMIN))
 			return -EPERM;
-		}
-		if (copy_from_user(&val, argp, sizeof(int))) {
+
+		if (copy_from_user(&val, argp, sizeof(int)))
 			return -EFAULT;
-		}
-		if (copy_from_user(&speed, argp + 1, sizeof(int))) {
+
+		if (copy_from_user(&speed, argp + 1, sizeof(int)))
 			return -EFAULT;
-		}
+
 		val = i8k_set_fan(val, speed);
 		break;
 
@@ -389,25 +338,24 @@ static int i8k_ioctl(struct inode *ip, struct file *fp, unsigned int cmd,
 		return -EINVAL;
 	}
 
-	if (val < 0) {
+	if (val < 0)
 		return val;
-	}
 
 	switch (cmd) {
 	case I8K_BIOS_VERSION:
-		if (copy_to_user(argp, &val, 4)) {
+		if (copy_to_user(argp, &val, 4))
 			return -EFAULT;
-		}
+
 		break;
 	case I8K_MACHINE_ID:
-		if (copy_to_user(argp, buff, 16)) {
+		if (copy_to_user(argp, buff, 16))
 			return -EFAULT;
-		}
+
 		break;
 	default:
-		if (copy_to_user(argp, &val, sizeof(int))) {
+		if (copy_to_user(argp, &val, sizeof(int)))
 			return -EFAULT;
-		}
+
 		break;
 	}
 
@@ -417,22 +365,21 @@ static int i8k_ioctl(struct inode *ip, struct file *fp, unsigned int cmd,
 /*
  * Print the information for /proc/i8k.
  */
-static int i8k_get_info(char *buffer, char **start, off_t fpos, int length)
+static int i8k_proc_show(struct seq_file *seq, void *offset)
 {
-	int n, fn_key, cpu_temp, ac_power;
+	int fn_key, cpu_temp, ac_power;
 	int left_fan, right_fan, left_speed, right_speed;
 
-	cpu_temp	= i8k_get_cpu_temp();			/* 11100 µs */
+	cpu_temp	= i8k_get_temp(0);			/* 11100 µs */
 	left_fan	= i8k_get_fan_status(I8K_FAN_LEFT);	/*   580 µs */
 	right_fan	= i8k_get_fan_status(I8K_FAN_RIGHT);	/*   580 µs */
 	left_speed	= i8k_get_fan_speed(I8K_FAN_LEFT);	/*   580 µs */
 	right_speed	= i8k_get_fan_speed(I8K_FAN_RIGHT);	/*   580 µs */
 	fn_key		= i8k_get_fn_status();			/*   750 µs */
-	if (power_status) {
+	if (power_status)
 		ac_power = i8k_get_power_status();		/* 14700 µs */
-	} else {
+	else
 		ac_power = -1;
-	}
 
 	/*
 	 * Info:
@@ -448,239 +395,51 @@ static int i8k_get_info(char *buffer, char **start, off_t fpos, int length)
 	 * 9)  AC power
 	 * 10) Fn Key status
 	 */
-	n = sprintf(buffer, "%s %s %s %d %d %d %d %d %d %d\n",
-		    I8K_PROC_FMT,
-		    bios_version,
-		    serial_number,
-		    cpu_temp,
-		    left_fan,
-		    right_fan, left_speed, right_speed, ac_power, fn_key);
-
-	return n;
-}
-
-static ssize_t i8k_read(struct file *f, char __user * buffer, size_t len,
-			loff_t * fpos)
-{
-	int n;
-	char info[128];
-
-	n = i8k_get_info(info, NULL, 0, 128);
-	if (n <= 0) {
-		return n;
-	}
-
-	if (*fpos >= n) {
-		return 0;
-	}
-
-	if ((*fpos + len) >= n) {
-		len = n - *fpos;
-	}
-
-	if (copy_to_user(buffer, info, len) != 0) {
-		return -EFAULT;
-	}
-
-	*fpos += len;
-	return len;
+	return seq_printf(seq, "%s %s %s %d %d %d %d %d %d %d\n",
+			  I8K_PROC_FMT,
+			  bios_version,
+			  i8k_get_dmi_data(DMI_PRODUCT_SERIAL),
+			  cpu_temp,
+			  left_fan, right_fan, left_speed, right_speed,
+			  ac_power, fn_key);
 }
 
-static char *__init string_trim(char *s, int size)
+static int i8k_open_fs(struct inode *inode, struct file *file)
 {
-	int len;
-	char *p;
-
-	if ((len = strlen(s)) > size) {
-		len = size;
-	}
-
-	for (p = s + len - 1; len && (*p == ' '); len--, p--) {
-		*p = '\0';
-	}
-
-	return s;
+	return single_open(file, i8k_proc_show, NULL);
 }
 
-/* DMI code, stolen from arch/i386/kernel/dmi_scan.c */
-
-/*
- * |<-- dmi->length -->|
- * |                   |
- * |dmi header    s=N  | string1,\0, ..., stringN,\0, ..., \0
- *                |                       |
- *                +-----------------------+
- */
-static char *__init dmi_string(DMIHeader * dmi, u8 s)
-{
-	u8 *p;
-
-	if (!s) {
-		return "";
-	}
-	s--;
-
-	p = (u8 *) dmi + dmi->length;
-	while (s > 0) {
-		p += strlen(p);
-		p++;
-		s--;
-	}
-
-	return p;
-}
-
-static void __init dmi_decode(DMIHeader * dmi)
-{
-	u8 *data = (u8 *) dmi;
-	char *p;
-
-#ifdef I8K_DEBUG
-	int i;
-	printk("%08x ", (int)data);
-	for (i = 0; i < data[1] && i < 64; i++) {
-		printk("%02x ", data[i]);
-	}
-	printk("\n");
-#endif
-
-	switch (dmi->type) {
-	case 0:		/* BIOS Information */
-		p = dmi_string(dmi, data[5]);
-		if (*p) {
-			strlcpy(bios_version, p, sizeof(bios_version));
-			string_trim(bios_version, sizeof(bios_version));
-		}
-		break;
-	case 1:		/* System Information */
-		p = dmi_string(dmi, data[4]);
-		if (*p) {
-			strlcpy(system_vendor, p, sizeof(system_vendor));
-			string_trim(system_vendor, sizeof(system_vendor));
-		}
-		p = dmi_string(dmi, data[5]);
-		if (*p) {
-			strlcpy(product_name, p, sizeof(product_name));
-			string_trim(product_name, sizeof(product_name));
-		}
-		p = dmi_string(dmi, data[7]);
-		if (*p) {
-			strlcpy(serial_number, p, sizeof(serial_number));
-			string_trim(serial_number, sizeof(serial_number));
-		}
-		break;
-	}
-}
-
-static int __init dmi_table(u32 base, int len, int num,
-			    void (*fn) (DMIHeader *))
-{
-	u8 *buf;
-	u8 *data;
-	DMIHeader *dmi;
-	int i = 1;
-
-	buf = ioremap(base, len);
-	if (buf == NULL) {
-		return -1;
-	}
-	data = buf;
-
-	/*
-	 * Stop when we see al the items the table claimed to have
-	 * or we run off the end of the table (also happens)
-	 */
-	while ((i < num) && ((data - buf) < len)) {
-		dmi = (DMIHeader *) data;
-		/*
-		 * Avoid misparsing crud if the length of the last
-		 * record is crap
-		 */
-		if ((data - buf + dmi->length) >= len) {
-			break;
-		}
-		fn(dmi);
-		data += dmi->length;
-		/*
-		 * Don't go off the end of the data if there is
-		 * stuff looking like string fill past the end
-		 */
-		while (((data - buf) < len) && (*data || data[1])) {
-			data++;
-		}
-		data += 2;
-		i++;
-	}
-	iounmap(buf);
-
-	return 0;
-}
-
-static int __init dmi_iterate(void (*decode) (DMIHeader *))
-{
-	unsigned char buf[20];
-	void __iomem *p = ioremap(0xe0000, 0x20000), *q;
-
-	if (!p)
-		return -1;
-
-	for (q = p; q < p + 0x20000; q += 16) {
-		memcpy_fromio(buf, q, 20);
-		if (memcmp(buf, "_DMI_", 5) == 0) {
-			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];
-#ifdef I8K_DEBUG
-			printk(KERN_INFO "DMI %d.%d present.\n",
-			       buf[14] >> 4, buf[14] & 0x0F);
-			printk(KERN_INFO "%d structures occupying %d bytes.\n",
-			       buf[13] << 8 | buf[12], buf[7] << 8 | buf[6]);
-			printk(KERN_INFO "DMI table at 0x%08X.\n",
-			       buf[11] << 24 | buf[10] << 16 | buf[9] << 8 |
-			       buf[8]);
-#endif
-			if (dmi_table(base, len, num, decode) == 0) {
-				iounmap(p);
-				return 0;
-			}
-		}
-	}
-	iounmap(p);
-	return -1;
-}
-
-/* end of DMI code */
-
-/*
- * Get DMI information.
- */
-static int __init i8k_dmi_probe(void)
-{
-	char **p;
-
-	if (dmi_iterate(dmi_decode) != 0) {
-		printk(KERN_INFO "i8k: unable to get DMI information\n");
-		return -ENODEV;
-	}
-
-	if (strncmp(system_vendor, DELL_SIGNATURE, strlen(DELL_SIGNATURE)) != 0) {
-		printk(KERN_INFO "i8k: not running on a Dell system\n");
-		return -ENODEV;
-	}
-
-	for (p = supported_models;; p++) {
-		if (!*p) {
-			printk(KERN_INFO "i8k: unsupported model: %s\n",
-			       product_name);
-			return -ENODEV;
-		}
-		if (strncmp(product_name, *p, strlen(*p)) == 0) {
-			break;
-		}
-	}
-
-	return 0;
-}
+static struct dmi_system_id __initdata i8k_dmi_table[] = {
+	{
+		.ident = "Dell Inspiron",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"),
+		},
+	},
+	{
+		.ident = "Dell Latitude",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"),
+		},
+	},
+	{
+		.ident = "Dell Inspiron 2",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron"),
+		},
+	},
+	{
+		.ident = "Dell Latitude 2",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"),
+		},
+	},
+	{ }
+};
 
 /*
  * Probe for the presence of a supported laptop.
@@ -689,23 +448,31 @@ static int __init i8k_probe(void)
 {
 	char buff[4];
 	int version;
-	int smm_found = 0;
 
 	/*
 	 * Get DMI information
 	 */
-	if (i8k_dmi_probe() != 0) {
+	if (!dmi_check_system(i8k_dmi_table)) {
+		if (!ignore_dmi && !force)
+			return -ENODEV;
+
+		printk(KERN_INFO "i8k: not running on a supported Dell system.\n");
 		printk(KERN_INFO "i8k: vendor=%s, model=%s, version=%s\n",
-		       system_vendor, product_name, bios_version);
+			i8k_get_dmi_data(DMI_SYS_VENDOR),
+			i8k_get_dmi_data(DMI_PRODUCT_NAME),
+			i8k_get_dmi_data(DMI_BIOS_VERSION));
 	}
 
+	strlcpy(bios_version, i8k_get_dmi_data(DMI_BIOS_VERSION), sizeof(bios_version));
+
 	/*
 	 * Get SMM Dell signature
 	 */
-	if (i8k_get_dell_signature() != 0) {
-		printk(KERN_INFO "i8k: unable to get SMM Dell signature\n");
-	} else {
-		smm_found = 1;
+	if (i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG1) &&
+	    i8k_get_dell_signature(I8K_SMM_GET_DELL_SIG2)) {
+		printk(KERN_ERR "i8k: unable to get SMM Dell signature\n");
+		if (!force)
+			return -ENODEV;
 	}
 
 	/*
@@ -713,9 +480,8 @@ static int __init i8k_probe(void)
 	 */
 	version = i8k_get_bios_version();
 	if (version <= 0) {
-		printk(KERN_INFO "i8k: unable to get SMM BIOS version\n");
+		printk(KERN_WARNING "i8k: unable to get SMM BIOS version\n");
 	} else {
-		smm_found = 1;
 		buff[0] = (version >> 16) & 0xff;
 		buff[1] = (version >> 8) & 0xff;
 		buff[2] = (version) & 0xff;
@@ -723,43 +489,33 @@ static int __init i8k_probe(void)
 		/*
 		 * If DMI BIOS version is unknown use SMM BIOS version.
 		 */
-		if (bios_version[0] == '?') {
-			strcpy(bios_version, buff);
-		}
+		if (!dmi_get_system_info(DMI_BIOS_VERSION))
+			strlcpy(bios_version, buff, sizeof(bios_version));
+
 		/*
 		 * Check if the two versions match.
 		 */
-		if (strncmp(buff, bios_version, sizeof(bios_version)) != 0) {
-			printk(KERN_INFO
-			       "i8k: BIOS version mismatch: %s != %s\n", buff,
-			       bios_version);
-		}
-	}
-
-	if (!smm_found && !force) {
-		return -ENODEV;
+		if (strncmp(buff, bios_version, sizeof(bios_version)) != 0)
+			printk(KERN_WARNING "i8k: BIOS version mismatch: %s != %s\n",
+				buff, bios_version);
 	}
 
 	return 0;
 }
 
-#ifdef MODULE
-static
-#endif
-int __init i8k_init(void)
+static int __init i8k_init(void)
 {
 	struct proc_dir_entry *proc_i8k;
 
 	/* Are we running on an supported laptop? */
-	if (i8k_probe() != 0) {
+	if (i8k_probe())
 		return -ENODEV;
-	}
 
 	/* Register the proc entry */
-	proc_i8k = create_proc_info_entry("i8k", 0, NULL, i8k_get_info);
-	if (!proc_i8k) {
+	proc_i8k = create_proc_entry("i8k", 0, NULL);
+	if (!proc_i8k)
 		return -ENOENT;
-	}
+
 	proc_i8k->proc_fops = &i8k_fops;
 	proc_i8k->owner = THIS_MODULE;
 
@@ -770,19 +526,10 @@ int __init i8k_init(void)
 	return 0;
 }
 
-#ifdef MODULE
-int init_module(void)
+static void __exit i8k_exit(void)
 {
-	return i8k_init();
-}
-
-void cleanup_module(void)
-{
-	/* Remove the proc entry */
 	remove_proc_entry("i8k", NULL);
-
-	printk(KERN_INFO "i8k: module unloaded\n");
 }
-#endif
 
-/* end of file */
+module_init(i8k_init);
+module_exit(i8k_exit);