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Diffstat (limited to 'drivers/hwmon/w83781d.c')
-rw-r--r--drivers/hwmon/w83781d.c197
1 files changed, 117 insertions, 80 deletions
diff --git a/drivers/hwmon/w83781d.c b/drivers/hwmon/w83781d.c
index e8a19005b7d2..cbed525a425f 100644
--- a/drivers/hwmon/w83781d.c
+++ b/drivers/hwmon/w83781d.c
@@ -1,37 +1,37 @@
/*
- w83781d.c - Part of lm_sensors, Linux kernel modules for hardware
- monitoring
- Copyright (c) 1998 - 2001 Frodo Looijaard <frodol@dds.nl>,
- Philip Edelbrock <phil@netroedge.com>,
- and Mark Studebaker <mdsxyz123@yahoo.com>
- Copyright (c) 2007 - 2008 Jean Delvare <khali@linux-fr.org>
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
+ * w83781d.c - Part of lm_sensors, Linux kernel modules for hardware
+ * monitoring
+ * Copyright (c) 1998 - 2001 Frodo Looijaard <frodol@dds.nl>,
+ * Philip Edelbrock <phil@netroedge.com>,
+ * and Mark Studebaker <mdsxyz123@yahoo.com>
+ * Copyright (c) 2007 - 2008 Jean Delvare <khali@linux-fr.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
/*
- Supports following chips:
-
- Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
- as99127f 7 3 0 3 0x31 0x12c3 yes no
- as99127f rev.2 (type_name = as99127f) 0x31 0x5ca3 yes no
- w83781d 7 3 0 3 0x10-1 0x5ca3 yes yes
- w83782d 9 3 2-4 3 0x30 0x5ca3 yes yes
- w83783s 5-6 3 2 1-2 0x40 0x5ca3 yes no
-
-*/
+ * Supports following chips:
+ *
+ * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
+ * as99127f 7 3 0 3 0x31 0x12c3 yes no
+ * as99127f rev.2 (type_name = as99127f) 0x31 0x5ca3 yes no
+ * w83781d 7 3 0 3 0x10-1 0x5ca3 yes yes
+ * w83782d 9 3 2-4 3 0x30 0x5ca3 yes yes
+ * w83783s 5-6 3 2 1-2 0x40 0x5ca3 yes no
+ *
+ */
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -145,8 +145,10 @@ static const u8 W83781D_REG_PWM[] = { 0x5B, 0x5A, 0x5E, 0x5F };
#define W83781D_REG_I2C_ADDR 0x48
#define W83781D_REG_I2C_SUBADDR 0x4A
-/* The following are undocumented in the data sheets however we
- received the information in an email from Winbond tech support */
+/*
+ * The following are undocumented in the data sheets however we
+ * received the information in an email from Winbond tech support
+ */
/* Sensor selection - not on 781d */
#define W83781D_REG_SCFG1 0x5D
static const u8 BIT_SCFG1[] = { 0x02, 0x04, 0x08 };
@@ -238,9 +240,11 @@ struct w83781d_data {
u32 beep_mask; /* Register encoding, combined */
u8 pwm[4]; /* Register value */
u8 pwm2_enable; /* Boolean */
- u16 sens[3]; /* 782D/783S only.
- 1 = pentium diode; 2 = 3904 diode;
- 4 = thermistor */
+ u16 sens[3]; /*
+ * 782D/783S only.
+ * 1 = pentium diode; 2 = 3904 diode;
+ * 4 = thermistor
+ */
u8 vrm;
};
@@ -636,10 +640,12 @@ show_fan_div(struct device *dev, struct device_attribute *da, char *buf)
(long) DIV_FROM_REG(data->fan_div[attr->index]));
}
-/* Note: we save and restore the fan minimum here, because its value is
- determined in part by the fan divisor. This follows the principle of
- least surprise; the user doesn't expect the fan minimum to change just
- because the divisor changed. */
+/*
+ * Note: we save and restore the fan minimum here, because its value is
+ * determined in part by the fan divisor. This follows the principle of
+ * least surprise; the user doesn't expect the fan minimum to change just
+ * because the divisor changed.
+ */
static ssize_t
store_fan_div(struct device *dev, struct device_attribute *da,
const char *buf, size_t count)
@@ -847,7 +853,8 @@ static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR,
static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR,
show_sensor, store_sensor, 2);
-/* Assumes that adapter is of I2C, not ISA variety.
+/*
+ * Assumes that adapter is of I2C, not ISA variety.
* OTHERWISE DON'T CALL THIS
*/
static int
@@ -1102,9 +1109,11 @@ w83781d_detect(struct i2c_client *client, struct i2c_board_info *info)
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
- /* We block updates of the ISA device to minimize the risk of
- concurrent access to the same W83781D chip through different
- interfaces. */
+ /*
+ * We block updates of the ISA device to minimize the risk of
+ * concurrent access to the same W83781D chip through different
+ * interfaces.
+ */
if (isa)
mutex_lock(&isa->update_lock);
@@ -1124,8 +1133,10 @@ w83781d_detect(struct i2c_client *client, struct i2c_board_info *info)
"Detection of w83781d chip failed at step 4\n");
goto err_nodev;
}
- /* If Winbond SMBus, check address at 0x48.
- Asus doesn't support, except for as99127f rev.2 */
+ /*
+ * If Winbond SMBus, check address at 0x48.
+ * Asus doesn't support, except for as99127f rev.2
+ */
if ((!(val1 & 0x80) && val2 == 0xa3) ||
((val1 & 0x80) && val2 == 0x5c)) {
if (i2c_smbus_read_byte_data(client, W83781D_REG_I2C_ADDR)
@@ -1346,25 +1357,33 @@ w83781d_init_device(struct device *dev)
int type = data->type;
u8 tmp;
- if (reset && type != as99127f) { /* this resets registers we don't have
- documentation for on the as99127f */
- /* Resetting the chip has been the default for a long time,
- but it causes the BIOS initializations (fan clock dividers,
- thermal sensor types...) to be lost, so it is now optional.
- It might even go away if nobody reports it as being useful,
- as I see very little reason why this would be needed at
- all. */
+ if (reset && type != as99127f) { /*
+ * this resets registers we don't have
+ * documentation for on the as99127f
+ */
+ /*
+ * Resetting the chip has been the default for a long time,
+ * but it causes the BIOS initializations (fan clock dividers,
+ * thermal sensor types...) to be lost, so it is now optional.
+ * It might even go away if nobody reports it as being useful,
+ * as I see very little reason why this would be needed at
+ * all.
+ */
dev_info(dev, "If reset=1 solved a problem you were "
"having, please report!\n");
/* save these registers */
i = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG);
p = w83781d_read_value(data, W83781D_REG_PWMCLK12);
- /* Reset all except Watchdog values and last conversion values
- This sets fan-divs to 2, among others */
+ /*
+ * Reset all except Watchdog values and last conversion values
+ * This sets fan-divs to 2, among others
+ */
w83781d_write_value(data, W83781D_REG_CONFIG, 0x80);
- /* Restore the registers and disable power-on abnormal beep.
- This saves FAN 1/2/3 input/output values set by BIOS. */
+ /*
+ * Restore the registers and disable power-on abnormal beep.
+ * This saves FAN 1/2/3 input/output values set by BIOS.
+ */
w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, i | 0x80);
w83781d_write_value(data, W83781D_REG_PWMCLK12, p);
/*
@@ -1375,8 +1394,10 @@ w83781d_init_device(struct device *dev)
w83781d_write_value(data, W83781D_REG_BEEP_INTS2, 0);
}
- /* Disable power-on abnormal beep, as advised by the datasheet.
- Already done if reset=1. */
+ /*
+ * Disable power-on abnormal beep, as advised by the datasheet.
+ * Already done if reset=1.
+ */
if (init && !reset && type != as99127f) {
i = w83781d_read_value(data, W83781D_REG_BEEP_CONFIG);
w83781d_write_value(data, W83781D_REG_BEEP_CONFIG, i | 0x80);
@@ -1533,8 +1554,10 @@ static struct w83781d_data *w83781d_update_device(struct device *dev)
| (w83781d_read_value(data,
W83782D_REG_ALARM2) << 8);
} else {
- /* No real-time status registers, fall back to
- interrupt status registers */
+ /*
+ * No real-time status registers, fall back to
+ * interrupt status registers
+ */
data->alarms = w83781d_read_value(data,
W83781D_REG_ALARM1)
| (w83781d_read_value(data,
@@ -1588,8 +1611,10 @@ static struct platform_device *pdev;
static unsigned short isa_address = 0x290;
-/* I2C devices get this name attribute automatically, but for ISA devices
- we must create it by ourselves. */
+/*
+ * I2C devices get this name attribute automatically, but for ISA devices
+ * we must create it by ourselves.
+ */
static ssize_t
show_name(struct device *dev, struct device_attribute *devattr, char *buf)
{
@@ -1619,8 +1644,10 @@ static int w83781d_alias_detect(struct i2c_client *client, u8 chipid)
if (w83781d_read_value(isa, W83781D_REG_WCHIPID) != chipid)
return 0; /* Chip type doesn't match */
- /* We compare all the limit registers, the config register and the
- * interrupt mask registers */
+ /*
+ * We compare all the limit registers, the config register and the
+ * interrupt mask registers
+ */
for (i = 0x2b; i <= 0x3d; i++) {
if (w83781d_read_value(isa, i) !=
i2c_smbus_read_byte_data(client, i))
@@ -1701,12 +1728,14 @@ w83781d_write_value_isa(struct w83781d_data *data, u16 reg, u16 value)
}
}
-/* The SMBus locks itself, usually, but nothing may access the Winbond between
- bank switches. ISA access must always be locked explicitly!
- We ignore the W83781D BUSY flag at this moment - it could lead to deadlocks,
- would slow down the W83781D access and should not be necessary.
- There are some ugly typecasts here, but the good news is - they should
- nowhere else be necessary! */
+/*
+ * The SMBus locks itself, usually, but nothing may access the Winbond between
+ * bank switches. ISA access must always be locked explicitly!
+ * We ignore the W83781D BUSY flag at this moment - it could lead to deadlocks,
+ * would slow down the W83781D access and should not be necessary.
+ * There are some ugly typecasts here, but the good news is - they should
+ * nowhere else be necessary!
+ */
static int
w83781d_read_value(struct w83781d_data *data, u16 reg)
{
@@ -1833,9 +1862,11 @@ w83781d_isa_found(unsigned short address)
int val, save, found = 0;
int port;
- /* Some boards declare base+0 to base+7 as a PNP device, some base+4
+ /*
+ * Some boards declare base+0 to base+7 as a PNP device, some base+4
* to base+7 and some base+5 to base+6. So we better request each port
- * individually for the probing phase. */
+ * individually for the probing phase.
+ */
for (port = address; port < address + W83781D_EXTENT; port++) {
if (!request_region(port, 1, "w83781d")) {
pr_debug("Failed to request port 0x%x\n", port);
@@ -1844,8 +1875,10 @@ w83781d_isa_found(unsigned short address)
}
#define REALLY_SLOW_IO
- /* We need the timeouts for at least some W83781D-like
- chips. But only if we read 'undefined' registers. */
+ /*
+ * We need the timeouts for at least some W83781D-like
+ * chips. But only if we read 'undefined' registers.
+ */
val = inb_p(address + 1);
if (inb_p(address + 2) != val
|| inb_p(address + 3) != val
@@ -1855,8 +1888,10 @@ w83781d_isa_found(unsigned short address)
}
#undef REALLY_SLOW_IO
- /* We should be able to change the 7 LSB of the address port. The
- MSB (busy flag) should be clear initially, set after the write. */
+ /*
+ * We should be able to change the 7 LSB of the address port. The
+ * MSB (busy flag) should be clear initially, set after the write.
+ */
save = inb_p(address + W83781D_ADDR_REG_OFFSET);
if (save & 0x80) {
pr_debug("Detection failed at step %d\n", 2);
@@ -2042,8 +2077,10 @@ sensors_w83781d_init(void)
{
int res;
- /* We register the ISA device first, so that we can skip the
- * registration of an I2C interface to the same device. */
+ /*
+ * We register the ISA device first, so that we can skip the
+ * registration of an I2C interface to the same device.
+ */
res = w83781d_isa_register();
if (res)
goto exit;
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-11-23 02:36:10 +0000