#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
#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
#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");
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");
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,
+static const struct file_operations i8k_fops = {
+ .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;
: "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;
}
*/
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(®s)) < 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(®s) ? : regs.eax;
}
/*
*/
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(®s)) < 0) {
+ if ((rc = i8k_smm(®s)) < 0)
return rc;
- }
switch ((regs.eax >> I8K_FN_SHIFT) & I8K_FN_MASK) {
case I8K_FN_UP:
*/
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(®s)) < 0) {
+ if ((rc = i8k_smm(®s)) < 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;
}
/*
*/
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(®s)) < 0) {
- return rc;
- }
-
- return (regs.eax & 0xff);
+ return i8k_smm(®s) ? : regs.eax & 0xff;
}
/*
*/
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(®s)) < 0) {
- return rc;
- }
-
- return (regs.eax & 0xffff) * I8K_FAN_MULT;
+ return i8k_smm(®s) ? : (regs.eax & 0xffff) * I8K_FAN_MULT;
}
/*
*/
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(®s)) < 0) {
- return rc;
- }
- return (i8k_get_fan_status(fan));
+ return i8k_smm(®s) ? : 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(®s)) < 0) {
+ regs.ebx = sensor & 0xff;
+ if ((rc = i8k_smm(®s)) < 0)
return rc;
- }
+
temp = regs.eax & 0xff;
#ifdef I8K_TEMPERATURE_BUG
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(®s)) < 0) {
+ if ((rc = i8k_smm(®s)) < 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;
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:
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;
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;
}
/*
* 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:
* 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.
{
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;
}
/*
*/
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;
/*
* 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;
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);
git.openpandora.org / pandora-kernel.git / blobdiff