hwmon: (it87) Add support for beep on alarm
The IT87xxF chips support beeping on alarm, if properly wired and
configured. There is one control bit for each input type (temperature,
fan, voltage.) Let the user see and change them.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
index 7a349e0..d70c6ec 100644
--- a/drivers/hwmon/it87.c
+++ b/drivers/hwmon/it87.c
@@ -128,6 +128,7 @@
#define IT87_SIO_GPIO5_REG 0x29
#define IT87_SIO_PINX2_REG 0x2c /* Pin selection */
#define IT87_SIO_VID_REG 0xfc /* VID value */
+#define IT87_SIO_BEEP_PIN_REG 0xf6 /* Beep pin mapping */
/* Update battery voltage after every reading if true */
static int update_vbat;
@@ -187,6 +188,7 @@
#define IT87_REG_VIN_ENABLE 0x50
#define IT87_REG_TEMP_ENABLE 0x51
+#define IT87_REG_BEEP_ENABLE 0x5c
#define IT87_REG_CHIPID 0x58
@@ -246,6 +248,7 @@
/* Values read from Super-I/O config space */
u8 revision;
u8 vid_value;
+ u8 beep_pin;
/* Features skipped based on config or DMI */
u8 skip_vid;
u8 skip_fan;
@@ -279,6 +282,7 @@
u8 vid; /* Register encoding, combined */
u8 vrm;
u32 alarms; /* Register encoding, combined */
+ u8 beeps; /* Register encoding */
u8 fan_main_ctrl; /* Register value */
u8 fan_ctl; /* Register value */
@@ -919,6 +923,55 @@
static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
+static ssize_t show_beep(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ int bitnr = to_sensor_dev_attr(attr)->index;
+ struct it87_data *data = it87_update_device(dev);
+ return sprintf(buf, "%u\n", (data->beeps >> bitnr) & 1);
+}
+static ssize_t set_beep(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ int bitnr = to_sensor_dev_attr(attr)->index;
+ struct it87_data *data = dev_get_drvdata(dev);
+ long val;
+
+ if (strict_strtol(buf, 10, &val) < 0
+ || (val != 0 && val != 1))
+ return -EINVAL;
+
+ mutex_lock(&data->update_lock);
+ data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
+ if (val)
+ data->beeps |= (1 << bitnr);
+ else
+ data->beeps &= ~(1 << bitnr);
+ it87_write_value(data, IT87_REG_BEEP_ENABLE, data->beeps);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static SENSOR_DEVICE_ATTR(in0_beep, S_IRUGO | S_IWUSR,
+ show_beep, set_beep, 1);
+static SENSOR_DEVICE_ATTR(in1_beep, S_IRUGO, show_beep, NULL, 1);
+static SENSOR_DEVICE_ATTR(in2_beep, S_IRUGO, show_beep, NULL, 1);
+static SENSOR_DEVICE_ATTR(in3_beep, S_IRUGO, show_beep, NULL, 1);
+static SENSOR_DEVICE_ATTR(in4_beep, S_IRUGO, show_beep, NULL, 1);
+static SENSOR_DEVICE_ATTR(in5_beep, S_IRUGO, show_beep, NULL, 1);
+static SENSOR_DEVICE_ATTR(in6_beep, S_IRUGO, show_beep, NULL, 1);
+static SENSOR_DEVICE_ATTR(in7_beep, S_IRUGO, show_beep, NULL, 1);
+/* fanX_beep writability is set later */
+static SENSOR_DEVICE_ATTR(fan1_beep, S_IRUGO, show_beep, set_beep, 0);
+static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
+static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
+static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
+static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
+static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
+ show_beep, set_beep, 2);
+static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_beep, NULL, 2);
+
static ssize_t
show_vrm_reg(struct device *dev, struct device_attribute *attr, char *buf)
{
@@ -1014,6 +1067,26 @@
.attrs = it87_attributes,
};
+static struct attribute *it87_attributes_beep[] = {
+ &sensor_dev_attr_in0_beep.dev_attr.attr,
+ &sensor_dev_attr_in1_beep.dev_attr.attr,
+ &sensor_dev_attr_in2_beep.dev_attr.attr,
+ &sensor_dev_attr_in3_beep.dev_attr.attr,
+ &sensor_dev_attr_in4_beep.dev_attr.attr,
+ &sensor_dev_attr_in5_beep.dev_attr.attr,
+ &sensor_dev_attr_in6_beep.dev_attr.attr,
+ &sensor_dev_attr_in7_beep.dev_attr.attr,
+
+ &sensor_dev_attr_temp1_beep.dev_attr.attr,
+ &sensor_dev_attr_temp2_beep.dev_attr.attr,
+ &sensor_dev_attr_temp3_beep.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group it87_group_beep = {
+ .attrs = it87_attributes_beep,
+};
+
static struct attribute *it87_attributes_fan16[5][3+1] = { {
&sensor_dev_attr_fan1_input16.dev_attr.attr,
&sensor_dev_attr_fan1_min16.dev_attr.attr,
@@ -1107,6 +1180,14 @@
{ .attrs = it87_attributes_pwm[2] },
};
+static struct attribute *it87_attributes_fan_beep[] = {
+ &sensor_dev_attr_fan1_beep.dev_attr.attr,
+ &sensor_dev_attr_fan2_beep.dev_attr.attr,
+ &sensor_dev_attr_fan3_beep.dev_attr.attr,
+ &sensor_dev_attr_fan4_beep.dev_attr.attr,
+ &sensor_dev_attr_fan5_beep.dev_attr.attr,
+};
+
static struct attribute *it87_attributes_vid[] = {
&dev_attr_vrm.attr,
&dev_attr_cpu0_vid.attr,
@@ -1174,6 +1255,10 @@
if (sio_data->type == it87) {
/* The IT8705F doesn't have VID pins at all */
sio_data->skip_vid = 1;
+
+ /* The IT8705F has a different LD number for GPIO */
+ superio_select(5);
+ sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
} else {
int reg;
@@ -1207,7 +1292,11 @@
pr_info("it87: in3 is VCC (+5V)\n");
if (reg & (1 << 1))
pr_info("it87: in7 is VCCH (+5V Stand-By)\n");
+
+ sio_data->beep_pin = superio_inb(IT87_SIO_BEEP_PIN_REG) & 0x3f;
}
+ if (sio_data->beep_pin)
+ pr_info("it87: Beeping is supported\n");
/* Disable specific features based on DMI strings */
board_vendor = dmi_get_system_info(DMI_BOARD_VENDOR);
@@ -1240,10 +1329,15 @@
int i;
sysfs_remove_group(&dev->kobj, &it87_group);
+ if (sio_data->beep_pin)
+ sysfs_remove_group(&dev->kobj, &it87_group_beep);
for (i = 0; i < 5; i++) {
if (!(data->has_fan & (1 << i)))
continue;
sysfs_remove_group(&dev->kobj, &fan_group[i]);
+ if (sio_data->beep_pin)
+ sysfs_remove_file(&dev->kobj,
+ it87_attributes_fan_beep[i]);
}
for (i = 0; i < 3; i++) {
if (sio_data->skip_pwm & (1 << 0))
@@ -1263,6 +1357,7 @@
const struct attribute_group *fan_group;
int err = 0, i;
int enable_pwm_interface;
+ int fan_beep_need_rw;
static const char *names[] = {
"it87",
"it8712",
@@ -1311,14 +1406,40 @@
if ((err = sysfs_create_group(&dev->kobj, &it87_group)))
goto ERROR2;
+ if (sio_data->beep_pin) {
+ err = sysfs_create_group(&dev->kobj, &it87_group_beep);
+ if (err)
+ goto ERROR4;
+ }
+
/* Do not create fan files for disabled fans */
fan_group = it87_get_fan_group(data);
+ fan_beep_need_rw = 1;
for (i = 0; i < 5; i++) {
if (!(data->has_fan & (1 << i)))
continue;
err = sysfs_create_group(&dev->kobj, &fan_group[i]);
if (err)
goto ERROR4;
+
+ if (sio_data->beep_pin) {
+ err = sysfs_create_file(&dev->kobj,
+ it87_attributes_fan_beep[i]);
+ if (err)
+ goto ERROR4;
+ if (!fan_beep_need_rw)
+ continue;
+
+ /* As we have a single beep enable bit for all fans,
+ * only the first enabled fan has a writable attribute
+ * for it. */
+ if (sysfs_chmod_file(&dev->kobj,
+ it87_attributes_fan_beep[i],
+ S_IRUGO | S_IWUSR))
+ dev_dbg(dev, "chmod +w fan%d_beep failed\n",
+ i + 1);
+ fan_beep_need_rw = 0;
+ }
}
if (enable_pwm_interface) {
@@ -1608,6 +1729,7 @@
it87_read_value(data, IT87_REG_ALARM1) |
(it87_read_value(data, IT87_REG_ALARM2) << 8) |
(it87_read_value(data, IT87_REG_ALARM3) << 16);
+ data->beeps = it87_read_value(data, IT87_REG_BEEP_ENABLE);
data->fan_main_ctrl = it87_read_value(data,
IT87_REG_FAN_MAIN_CTRL);