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path: root/drivers/char/i8k.c
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Diffstat (limited to 'drivers/char/i8k.c')
-rw-r--r--drivers/char/i8k.c127
1 files changed, 85 insertions, 42 deletions
diff --git a/drivers/char/i8k.c b/drivers/char/i8k.c
index d915707d2ba1..65525c7e903c 100644
--- a/drivers/char/i8k.c
+++ b/drivers/char/i8k.c
@@ -65,6 +65,8 @@ static char bios_version[4];
static struct device *i8k_hwmon_dev;
static u32 i8k_hwmon_flags;
static int i8k_fan_mult;
+static int i8k_pwm_mult;
+static int i8k_fan_max = I8K_FAN_HIGH;
#define I8K_HWMON_HAVE_TEMP1 (1 << 0)
#define I8K_HWMON_HAVE_TEMP2 (1 << 1)
@@ -97,6 +99,10 @@ static int fan_mult = I8K_FAN_MULT;
module_param(fan_mult, int, 0);
MODULE_PARM_DESC(fan_mult, "Factor to multiply fan speed with");
+static int fan_max = I8K_FAN_HIGH;
+module_param(fan_max, int, 0);
+MODULE_PARM_DESC(fan_max, "Maximum configurable fan speed");
+
static int i8k_open_fs(struct inode *inode, struct file *file);
static long i8k_ioctl(struct file *, unsigned int, unsigned long);
@@ -138,7 +144,9 @@ static int i8k_smm(struct smm_regs *regs)
if (!alloc_cpumask_var(&old_mask, GFP_KERNEL))
return -ENOMEM;
cpumask_copy(old_mask, &current->cpus_allowed);
- set_cpus_allowed_ptr(current, cpumask_of(0));
+ rc = set_cpus_allowed_ptr(current, cpumask_of(0));
+ if (rc)
+ goto out;
if (smp_processor_id() != 0) {
rc = -EBUSY;
goto out;
@@ -274,7 +282,7 @@ static int i8k_set_fan(int fan, int speed)
{
struct smm_regs regs = { .eax = I8K_SMM_SET_FAN, };
- speed = (speed < 0) ? 0 : ((speed > I8K_FAN_MAX) ? I8K_FAN_MAX : speed);
+ speed = (speed < 0) ? 0 : ((speed > i8k_fan_max) ? i8k_fan_max : speed);
regs.ebx = (fan & 0xff) | (speed << 8);
return i8k_smm(&regs) ? : i8k_get_fan_status(fan);
@@ -519,7 +527,7 @@ static ssize_t i8k_hwmon_show_pwm(struct device *dev,
status = i8k_get_fan_status(index);
if (status < 0)
return -EIO;
- return sprintf(buf, "%d\n", clamp_val(status * 128, 0, 255));
+ return sprintf(buf, "%d\n", clamp_val(status * i8k_pwm_mult, 0, 255));
}
static ssize_t i8k_hwmon_set_pwm(struct device *dev,
@@ -533,7 +541,7 @@ static ssize_t i8k_hwmon_set_pwm(struct device *dev,
err = kstrtoul(buf, 10, &val);
if (err)
return err;
- val = clamp_val(DIV_ROUND_CLOSEST(val, 128), 0, 2);
+ val = clamp_val(DIV_ROUND_CLOSEST(val, i8k_pwm_mult), 0, i8k_fan_max);
mutex_lock(&i8k_mutex);
err = i8k_set_fan(index, val);
@@ -542,20 +550,6 @@ static ssize_t i8k_hwmon_set_pwm(struct device *dev,
return err < 0 ? -EIO : count;
}
-static ssize_t i8k_hwmon_show_label(struct device *dev,
- struct device_attribute *devattr,
- char *buf)
-{
- static const char *labels[3] = {
- "CPU",
- "Left Fan",
- "Right Fan",
- };
- int index = to_sensor_dev_attr(devattr)->index;
-
- return sprintf(buf, "%s\n", labels[index]);
-}
-
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 2);
@@ -568,41 +562,34 @@ static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, i8k_hwmon_show_fan, NULL,
I8K_FAN_RIGHT);
static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm,
i8k_hwmon_set_pwm, I8K_FAN_RIGHT);
-static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, i8k_hwmon_show_label, NULL, 0);
-static SENSOR_DEVICE_ATTR(fan1_label, S_IRUGO, i8k_hwmon_show_label, NULL, 1);
-static SENSOR_DEVICE_ATTR(fan2_label, S_IRUGO, i8k_hwmon_show_label, NULL, 2);
static struct attribute *i8k_attrs[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr, /* 0 */
- &sensor_dev_attr_temp1_label.dev_attr.attr, /* 1 */
- &sensor_dev_attr_temp2_input.dev_attr.attr, /* 2 */
- &sensor_dev_attr_temp3_input.dev_attr.attr, /* 3 */
- &sensor_dev_attr_temp4_input.dev_attr.attr, /* 4 */
- &sensor_dev_attr_fan1_input.dev_attr.attr, /* 5 */
- &sensor_dev_attr_pwm1.dev_attr.attr, /* 6 */
- &sensor_dev_attr_fan1_label.dev_attr.attr, /* 7 */
- &sensor_dev_attr_fan2_input.dev_attr.attr, /* 8 */
- &sensor_dev_attr_pwm2.dev_attr.attr, /* 9 */
- &sensor_dev_attr_fan2_label.dev_attr.attr, /* 10 */
+ &sensor_dev_attr_temp2_input.dev_attr.attr, /* 1 */
+ &sensor_dev_attr_temp3_input.dev_attr.attr, /* 2 */
+ &sensor_dev_attr_temp4_input.dev_attr.attr, /* 3 */
+ &sensor_dev_attr_fan1_input.dev_attr.attr, /* 4 */
+ &sensor_dev_attr_pwm1.dev_attr.attr, /* 5 */
+ &sensor_dev_attr_fan2_input.dev_attr.attr, /* 6 */
+ &sensor_dev_attr_pwm2.dev_attr.attr, /* 7 */
NULL
};
static umode_t i8k_is_visible(struct kobject *kobj, struct attribute *attr,
int index)
{
- if ((index == 0 || index == 1) &&
- !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP1))
+ if (index == 0 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP1))
return 0;
- if (index == 2 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP2))
+ if (index == 1 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP2))
return 0;
- if (index == 3 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP3))
+ if (index == 2 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP3))
return 0;
- if (index == 4 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP4))
+ if (index == 3 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP4))
return 0;
- if (index >= 5 && index <= 7 &&
+ if (index >= 4 && index <= 5 &&
!(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN1))
return 0;
- if (index >= 8 && index <= 10 &&
+ if (index >= 6 && index <= 7 &&
!(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN2))
return 0;
@@ -657,6 +644,37 @@ static int __init i8k_init_hwmon(void)
return 0;
}
+struct i8k_config_data {
+ int fan_mult;
+ int fan_max;
+};
+
+enum i8k_configs {
+ DELL_LATITUDE_D520,
+ DELL_PRECISION_490,
+ DELL_STUDIO,
+ DELL_XPS_M140,
+};
+
+static const struct i8k_config_data i8k_config_data[] = {
+ [DELL_LATITUDE_D520] = {
+ .fan_mult = 1,
+ .fan_max = I8K_FAN_TURBO,
+ },
+ [DELL_PRECISION_490] = {
+ .fan_mult = 1,
+ .fan_max = I8K_FAN_TURBO,
+ },
+ [DELL_STUDIO] = {
+ .fan_mult = 1,
+ .fan_max = I8K_FAN_HIGH,
+ },
+ [DELL_XPS_M140] = {
+ .fan_mult = 1,
+ .fan_max = I8K_FAN_HIGH,
+ },
+};
+
static struct dmi_system_id i8k_dmi_table[] __initdata = {
{
.ident = "Dell Inspiron",
@@ -680,6 +698,14 @@ static struct dmi_system_id i8k_dmi_table[] __initdata = {
},
},
{
+ .ident = "Dell Latitude D520",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D520"),
+ },
+ .driver_data = (void *)&i8k_config_data[DELL_LATITUDE_D520],
+ },
+ {
.ident = "Dell Latitude 2",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
@@ -701,6 +727,15 @@ static struct dmi_system_id i8k_dmi_table[] __initdata = {
},
},
{
+ .ident = "Dell Precision 490",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME,
+ "Precision WorkStation 490"),
+ },
+ .driver_data = (void *)&i8k_config_data[DELL_PRECISION_490],
+ },
+ {
.ident = "Dell Precision",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
@@ -727,7 +762,7 @@ static struct dmi_system_id i8k_dmi_table[] __initdata = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "Studio"),
},
- .driver_data = (void *)1, /* fan multiplier override */
+ .driver_data = (void *)&i8k_config_data[DELL_STUDIO],
},
{
.ident = "Dell XPS M140",
@@ -735,7 +770,7 @@ static struct dmi_system_id i8k_dmi_table[] __initdata = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "MXC051"),
},
- .driver_data = (void *)1, /* fan multiplier override */
+ .driver_data = (void *)&i8k_config_data[DELL_XPS_M140],
},
{ }
};
@@ -775,9 +810,17 @@ static int __init i8k_probe(void)
}
i8k_fan_mult = fan_mult;
+ i8k_fan_max = fan_max ? : I8K_FAN_HIGH; /* Must not be 0 */
id = dmi_first_match(i8k_dmi_table);
- if (id && fan_mult == I8K_FAN_MULT && id->driver_data)
- i8k_fan_mult = (unsigned long)id->driver_data;
+ if (id && id->driver_data) {
+ const struct i8k_config_data *conf = id->driver_data;
+
+ if (fan_mult == I8K_FAN_MULT && conf->fan_mult)
+ i8k_fan_mult = conf->fan_mult;
+ if (fan_max == I8K_FAN_HIGH && conf->fan_max)
+ i8k_fan_max = conf->fan_max;
+ }
+ i8k_pwm_mult = DIV_ROUND_UP(255, i8k_fan_max);
return 0;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-20 05:18:25 +0000