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Diffstat (limited to 'drivers/hwmon/fschmd.c')
-rw-r--r--drivers/hwmon/fschmd.c251
1 files changed, 152 insertions, 99 deletions
diff --git a/drivers/hwmon/fschmd.c b/drivers/hwmon/fschmd.c
index d4d4ca65d37..d58abdc5a4c 100644
--- a/drivers/hwmon/fschmd.c
+++ b/drivers/hwmon/fschmd.c
@@ -1,4 +1,5 @@
-/* fschmd.c
+/*
+ * fschmd.c
*
* Copyright (C) 2007 - 2009 Hans de Goede <hdegoede@redhat.com>
*
@@ -49,12 +50,11 @@
#include <linux/kref.h>
/* Addresses to scan */
-static DEFINE_MUTEX(watchdog_mutex);
static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
/* Insmod parameters */
-static int nowayout = WATCHDOG_NOWAYOUT;
-module_param(nowayout, int, 0);
+static bool nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, bool, 0);
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
@@ -77,12 +77,12 @@ enum chips { fscpos, fscher, fscscy, fschrc, fschmd, fschds, fscsyl };
#define FSCHMD_CONTROL_ALERT_LED 0x01
/* watchdog */
-static const u8 FSCHMD_REG_WDOG_CONTROL[7] =
- { 0x21, 0x21, 0x21, 0x21, 0x21, 0x28, 0x28 };
-static const u8 FSCHMD_REG_WDOG_STATE[7] =
- { 0x23, 0x23, 0x23, 0x23, 0x23, 0x29, 0x29 };
-static const u8 FSCHMD_REG_WDOG_PRESET[7] =
- { 0x28, 0x28, 0x28, 0x28, 0x28, 0x2a, 0x2a };
+static const u8 FSCHMD_REG_WDOG_CONTROL[7] = {
+ 0x21, 0x21, 0x21, 0x21, 0x21, 0x28, 0x28 };
+static const u8 FSCHMD_REG_WDOG_STATE[7] = {
+ 0x23, 0x23, 0x23, 0x23, 0x23, 0x29, 0x29 };
+static const u8 FSCHMD_REG_WDOG_PRESET[7] = {
+ 0x28, 0x28, 0x28, 0x28, 0x28, 0x2a, 0x2a };
#define FSCHMD_WDOG_CONTROL_TRIGGER 0x10
#define FSCHMD_WDOG_CONTROL_STARTED 0x10 /* the same as trigger */
@@ -104,10 +104,12 @@ static const u8 FSCHMD_REG_VOLT[7][6] = {
static const int FSCHMD_NO_VOLT_SENSORS[7] = { 3, 3, 3, 3, 3, 3, 6 };
-/* minimum pwm at which the fan is driven (pwm can by increased depending on
- the temp. Notice that for the scy some fans share there minimum speed.
- Also notice that with the scy the sensor order is different than with the
- other chips, this order was in the 2.4 driver and kept for consistency. */
+/*
+ * minimum pwm at which the fan is driven (pwm can by increased depending on
+ * the temp. Notice that for the scy some fans share there minimum speed.
+ * Also notice that with the scy the sensor order is different than with the
+ * other chips, this order was in the 2.4 driver and kept for consistency.
+ */
static const u8 FSCHMD_REG_FAN_MIN[7][7] = {
{ 0x55, 0x65 }, /* pos */
{ 0x55, 0x65, 0xb5 }, /* her */
@@ -183,11 +185,13 @@ static const u8 FSCHMD_REG_TEMP_STATE[7][11] = {
0xb9, 0xc9, 0xd9, 0xe9, 0xf9 },
};
-/* temperature high limit registers, FSC does not document these. Proven to be
- there with field testing on the fscher and fschrc, already supported / used
- in the fscscy 2.4 driver. FSC has confirmed that the fschmd has registers
- at these addresses, but doesn't want to confirm they are the same as with
- the fscher?? */
+/*
+ * temperature high limit registers, FSC does not document these. Proven to be
+ * there with field testing on the fscher and fschrc, already supported / used
+ * in the fscscy 2.4 driver. FSC has confirmed that the fschmd has registers
+ * at these addresses, but doesn't want to confirm they are the same as with
+ * the fscher??
+ */
static const u8 FSCHMD_REG_TEMP_LIMIT[7][11] = {
{ 0, 0, 0 }, /* pos */
{ 0x76, 0x86, 0x96 }, /* her */
@@ -199,13 +203,15 @@ static const u8 FSCHMD_REG_TEMP_LIMIT[7][11] = {
0xba, 0xca, 0xda, 0xea, 0xfa },
};
-/* These were found through experimenting with an fscher, currently they are
- not used, but we keep them around for future reference.
- On the fscsyl AUTOP1 lives at 0x#c (so 0x5c for fan1, 0x6c for fan2, etc),
- AUTOP2 lives at 0x#e, and 0x#1 is a bitmask defining which temps influence
- the fan speed.
-static const u8 FSCHER_REG_TEMP_AUTOP1[] = { 0x73, 0x83, 0x93 };
-static const u8 FSCHER_REG_TEMP_AUTOP2[] = { 0x75, 0x85, 0x95 }; */
+/*
+ * These were found through experimenting with an fscher, currently they are
+ * not used, but we keep them around for future reference.
+ * On the fscsyl AUTOP1 lives at 0x#c (so 0x5c for fan1, 0x6c for fan2, etc),
+ * AUTOP2 lives at 0x#e, and 0x#1 is a bitmask defining which temps influence
+ * the fan speed.
+ * static const u8 FSCHER_REG_TEMP_AUTOP1[] = { 0x73, 0x83, 0x93 };
+ * static const u8 FSCHER_REG_TEMP_AUTOP2[] = { 0x75, 0x85, 0x95 };
+ */
static const int FSCHMD_NO_TEMP_SENSORS[7] = { 3, 3, 4, 3, 5, 5, 11 };
@@ -291,24 +297,30 @@ struct fschmd_data {
u8 fan_ripple[7]; /* divider for rps */
};
-/* Global variables to hold information read from special DMI tables, which are
- available on FSC machines with an fscher or later chip. There is no need to
- protect these with a lock as they are only modified from our attach function
- which always gets called with the i2c-core lock held and never accessed
- before the attach function is done with them. */
+/*
+ * Global variables to hold information read from special DMI tables, which are
+ * available on FSC machines with an fscher or later chip. There is no need to
+ * protect these with a lock as they are only modified from our attach function
+ * which always gets called with the i2c-core lock held and never accessed
+ * before the attach function is done with them.
+ */
static int dmi_mult[6] = { 490, 200, 100, 100, 200, 100 };
static int dmi_offset[6] = { 0, 0, 0, 0, 0, 0 };
static int dmi_vref = -1;
-/* Somewhat ugly :( global data pointer list with all fschmd devices, so that
- we can find our device data as when using misc_register there is no other
- method to get to ones device data from the open fop. */
+/*
+ * Somewhat ugly :( global data pointer list with all fschmd devices, so that
+ * we can find our device data as when using misc_register there is no other
+ * method to get to ones device data from the open fop.
+ */
static LIST_HEAD(watchdog_data_list);
/* Note this lock not only protect list access, but also data.kref access */
static DEFINE_MUTEX(watchdog_data_mutex);
-/* Release our data struct when we're detached from the i2c client *and* all
- references to our watchdog device are released */
+/*
+ * Release our data struct when we're detached from the i2c client *and* all
+ * references to our watchdog device are released
+ */
static void fschmd_release_resources(struct kref *ref)
{
struct fschmd_data *data = container_of(ref, struct fschmd_data, kref);
@@ -360,9 +372,14 @@ static ssize_t store_temp_max(struct device *dev, struct device_attribute
{
int index = to_sensor_dev_attr(devattr)->index;
struct fschmd_data *data = dev_get_drvdata(dev);
- long v = simple_strtol(buf, NULL, 10) / 1000;
+ long v;
+ int err;
- v = SENSORS_LIMIT(v, -128, 127) + 128;
+ err = kstrtol(buf, 10, &v);
+ if (err)
+ return err;
+
+ v = clamp_val(v / 1000, -128, 127) + 128;
mutex_lock(&data->update_lock);
i2c_smbus_write_byte_data(to_i2c_client(dev),
@@ -428,15 +445,27 @@ static ssize_t store_fan_div(struct device *dev, struct device_attribute
int index = to_sensor_dev_attr(devattr)->index;
struct fschmd_data *data = dev_get_drvdata(dev);
/* supported values: 2, 4, 8 */
- unsigned long v = simple_strtoul(buf, NULL, 10);
+ unsigned long v;
+ int err;
+
+ err = kstrtoul(buf, 10, &v);
+ if (err)
+ return err;
switch (v) {
- case 2: v = 1; break;
- case 4: v = 2; break;
- case 8: v = 3; break;
+ case 2:
+ v = 1;
+ break;
+ case 4:
+ v = 2;
+ break;
+ case 8:
+ v = 3;
+ break;
default:
- dev_err(dev, "fan_div value %lu not supported. "
- "Choose one of 2, 4 or 8!\n", v);
+ dev_err(dev,
+ "fan_div value %lu not supported. Choose one of 2, 4 or 8!\n",
+ v);
return -EINVAL;
}
@@ -503,11 +532,16 @@ static ssize_t store_pwm_auto_point1_pwm(struct device *dev,
{
int index = to_sensor_dev_attr(devattr)->index;
struct fschmd_data *data = dev_get_drvdata(dev);
- unsigned long v = simple_strtoul(buf, NULL, 10);
+ unsigned long v;
+ int err;
+
+ err = kstrtoul(buf, 10, &v);
+ if (err)
+ return err;
/* reg: 0 = allow turning off (except on the syl), 1-255 = 50-100% */
if (v || data->kind == fscsyl) {
- v = SENSORS_LIMIT(v, 128, 255);
+ v = clamp_val(v, 128, 255);
v = (v - 128) * 2 + 1;
}
@@ -523,8 +557,10 @@ static ssize_t store_pwm_auto_point1_pwm(struct device *dev,
}
-/* The FSC hwmon family has the ability to force an attached alert led to flash
- from software, we export this as an alert_led sysfs attr */
+/*
+ * The FSC hwmon family has the ability to force an attached alert led to flash
+ * from software, we export this as an alert_led sysfs attr
+ */
static ssize_t show_alert_led(struct device *dev,
struct device_attribute *devattr, char *buf)
{
@@ -541,7 +577,12 @@ static ssize_t store_alert_led(struct device *dev,
{
u8 reg;
struct fschmd_data *data = dev_get_drvdata(dev);
- unsigned long v = simple_strtoul(buf, NULL, 10);
+ unsigned long v;
+ int err;
+
+ err = kstrtoul(buf, 10, &v);
+ if (err)
+ return err;
mutex_lock(&data->update_lock);
@@ -755,8 +796,10 @@ static int watchdog_stop(struct fschmd_data *data)
}
data->watchdog_control &= ~FSCHMD_WDOG_CONTROL_STARTED;
- /* Don't store the stop flag in our watchdog control register copy, as
- its a write only bit (read always returns 0) */
+ /*
+ * Don't store the stop flag in our watchdog control register copy, as
+ * its a write only bit (read always returns 0)
+ */
i2c_smbus_write_byte_data(data->client,
FSCHMD_REG_WDOG_CONTROL[data->kind],
data->watchdog_control | FSCHMD_WDOG_CONTROL_STOP);
@@ -770,10 +813,12 @@ static int watchdog_open(struct inode *inode, struct file *filp)
struct fschmd_data *pos, *data = NULL;
int watchdog_is_open;
- /* We get called from drivers/char/misc.c with misc_mtx hold, and we
- call misc_register() from fschmd_probe() with watchdog_data_mutex
- hold, as misc_register() takes the misc_mtx lock, this is a possible
- deadlock, so we use mutex_trylock here. */
+ /*
+ * We get called from drivers/char/misc.c with misc_mtx hold, and we
+ * call misc_register() from fschmd_probe() with watchdog_data_mutex
+ * hold, as misc_register() takes the misc_mtx lock, this is a possible
+ * deadlock, so we use mutex_trylock here.
+ */
if (!mutex_trylock(&watchdog_data_mutex))
return -ERESTARTSYS;
list_for_each_entry(pos, &watchdog_data_list, list) {
@@ -848,9 +893,10 @@ static ssize_t watchdog_write(struct file *filp, const char __user *buf,
return count;
}
-static long watchdog_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+static long watchdog_ioctl(struct file *filp, unsigned int cmd,
+ unsigned long arg)
{
- static struct watchdog_info ident = {
+ struct watchdog_info ident = {
.options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT |
WDIOF_CARDRESET,
.identity = "FSC watchdog"
@@ -858,7 +904,6 @@ static long watchdog_ioctl(struct file *filp, unsigned int cmd, unsigned long ar
int i, ret = 0;
struct fschmd_data *data = filp->private_data;
- mutex_lock(&watchdog_mutex);
switch (cmd) {
case WDIOC_GETSUPPORT:
ident.firmware_version = data->revision;
@@ -915,7 +960,6 @@ static long watchdog_ioctl(struct file *filp, unsigned int cmd, unsigned long ar
default:
ret = -ENOTTY;
}
- mutex_unlock(&watchdog_mutex);
return ret;
}
@@ -933,30 +977,38 @@ static const struct file_operations watchdog_fops = {
* Detect, register, unregister and update device functions
*/
-/* DMI decode routine to read voltage scaling factors from special DMI tables,
- which are available on FSC machines with an fscher or later chip. */
+/*
+ * DMI decode routine to read voltage scaling factors from special DMI tables,
+ * which are available on FSC machines with an fscher or later chip.
+ */
static void fschmd_dmi_decode(const struct dmi_header *header, void *dummy)
{
int i, mult[3] = { 0 }, offset[3] = { 0 }, vref = 0, found = 0;
- /* dmi code ugliness, we get passed the address of the contents of
- a complete DMI record, but in the form of a dmi_header pointer, in
- reality this address holds header->length bytes of which the header
- are the first 4 bytes */
+ /*
+ * dmi code ugliness, we get passed the address of the contents of
+ * a complete DMI record, but in the form of a dmi_header pointer, in
+ * reality this address holds header->length bytes of which the header
+ * are the first 4 bytes
+ */
u8 *dmi_data = (u8 *)header;
/* We are looking for OEM-specific type 185 */
if (header->type != 185)
return;
- /* we are looking for what Siemens calls "subtype" 19, the subtype
- is stored in byte 5 of the dmi block */
+ /*
+ * we are looking for what Siemens calls "subtype" 19, the subtype
+ * is stored in byte 5 of the dmi block
+ */
if (header->length < 5 || dmi_data[4] != 19)
return;
- /* After the subtype comes 1 unknown byte and then blocks of 5 bytes,
- consisting of what Siemens calls an "Entity" number, followed by
- 2 16-bit words in LSB first order */
+ /*
+ * After the subtype comes 1 unknown byte and then blocks of 5 bytes,
+ * consisting of what Siemens calls an "Entity" number, followed by
+ * 2 16-bit words in LSB first order
+ */
for (i = 6; (i + 4) < header->length; i += 5) {
/* entity 1 - 3: voltage multiplier and offset */
if (dmi_data[i] >= 1 && dmi_data[i] <= 3) {
@@ -991,9 +1043,11 @@ static void fschmd_dmi_decode(const struct dmi_header *header, void *dummy)
dmi_mult[i] = mult[i] * 10;
dmi_offset[i] = offset[i] * 10;
}
- /* According to the docs there should be separate dmi entries
- for the mult's and offsets of in3-5 of the syl, but on
- my test machine these are not present */
+ /*
+ * According to the docs there should be separate dmi entries
+ * for the mult's and offsets of in3-5 of the syl, but on
+ * my test machine these are not present
+ */
dmi_mult[3] = dmi_mult[2];
dmi_mult[4] = dmi_mult[1];
dmi_mult[5] = dmi_mult[2];
@@ -1061,15 +1115,19 @@ static int fschmd_probe(struct i2c_client *client,
mutex_init(&data->watchdog_lock);
INIT_LIST_HEAD(&data->list);
kref_init(&data->kref);
- /* Store client pointer in our data struct for watchdog usage
- (where the client is found through a data ptr instead of the
- otherway around) */
+ /*
+ * Store client pointer in our data struct for watchdog usage
+ * (where the client is found through a data ptr instead of the
+ * otherway around)
+ */
data->client = client;
data->kind = kind;
if (kind == fscpos) {
- /* The Poseidon has hardwired temp limits, fill these
- in for the alarm resetting code */
+ /*
+ * The Poseidon has hardwired temp limits, fill these
+ * in for the alarm resetting code
+ */
data->temp_max[0] = 70 + 128;
data->temp_max[1] = 50 + 128;
data->temp_max[2] = 50 + 128;
@@ -1160,9 +1218,11 @@ static int fschmd_probe(struct i2c_client *client,
goto exit_detach;
}
- /* We take the data_mutex lock early so that watchdog_open() cannot
- run when misc_register() has completed, but we've not yet added
- our data to the watchdog_data_list (and set the default timeout) */
+ /*
+ * We take the data_mutex lock early so that watchdog_open() cannot
+ * run when misc_register() has completed, but we've not yet added
+ * our data to the watchdog_data_list (and set the default timeout)
+ */
mutex_lock(&watchdog_data_mutex);
for (i = 0; i < ARRAY_SIZE(watchdog_minors); i++) {
/* Register our watchdog part */
@@ -1190,8 +1250,8 @@ static int fschmd_probe(struct i2c_client *client,
}
if (i == ARRAY_SIZE(watchdog_minors)) {
data->watchdog_miscdev.minor = 0;
- dev_warn(&client->dev, "Couldn't register watchdog chardev "
- "(due to no free minor)\n");
+ dev_warn(&client->dev,
+ "Couldn't register watchdog chardev (due to no free minor)\n");
}
mutex_unlock(&watchdog_data_mutex);
@@ -1228,8 +1288,10 @@ static int fschmd_remove(struct i2c_client *client)
mutex_unlock(&data->watchdog_lock);
}
- /* Check if registered in case we're called from fschmd_detect
- to cleanup after an error */
+ /*
+ * Check if registered in case we're called from fschmd_detect
+ * to cleanup after an error
+ */
if (data->hwmon_dev)
hwmon_device_unregister(data->hwmon_dev);
@@ -1272,8 +1334,10 @@ static struct fschmd_data *fschmd_update_device(struct device *dev)
client,
FSCHMD_REG_TEMP_LIMIT[data->kind][i]);
- /* reset alarm if the alarm condition is gone,
- the chip doesn't do this itself */
+ /*
+ * reset alarm if the alarm condition is gone,
+ * the chip doesn't do this itself
+ */
if ((data->temp_status[i] & FSCHMD_TEMP_ALARM_MASK) ==
FSCHMD_TEMP_ALARM_MASK &&
data->temp_act[i] < data->temp_max[i])
@@ -1317,20 +1381,9 @@ static struct fschmd_data *fschmd_update_device(struct device *dev)
return data;
}
-static int __init fschmd_init(void)
-{
- return i2c_add_driver(&fschmd_driver);
-}
-
-static void __exit fschmd_exit(void)
-{
- i2c_del_driver(&fschmd_driver);
-}
+module_i2c_driver(fschmd_driver);
MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
MODULE_DESCRIPTION("FSC Poseidon, Hermes, Scylla, Heracles, Heimdall, Hades "
"and Syleus driver");
MODULE_LICENSE("GPL");
-
-module_init(fschmd_init);
-module_exit(fschmd_exit);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 13:28:32 +0000