--- /dev/null
+/*
+ * fschmd.c
+ *
+ * Copyright (C) 2007 - 2009 Hans de Goede <hdegoede@redhat.com>
+ *
+ * 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.
+ */
+
+/*
+ * Merged Fujitsu Siemens hwmon driver, supporting the Poseidon, Hermes,
+ * Scylla, Heracles, Heimdall, Hades and Syleus chips
+ *
+ * Based on the original 2.4 fscscy, 2.6 fscpos, 2.6 fscher and 2.6
+ * (candidate) fschmd drivers:
+ * Copyright (C) 2006 Thilo Cestonaro
+ * <thilo.cestonaro.external@fujitsu-siemens.com>
+ * Copyright (C) 2004, 2005 Stefan Ott <stefan@desire.ch>
+ * Copyright (C) 2003, 2004 Reinhard Nissl <rnissl@gmx.de>
+ * Copyright (c) 2001 Martin Knoblauch <mkn@teraport.de, knobi@knobisoft.de>
+ * Copyright (C) 2000 Hermann Jung <hej@odn.de>
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/i2c.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/sysfs.h>
+#include <linux/dmi.h>
+#include <linux/fs.h>
+#include <linux/watchdog.h>
+#include <linux/miscdevice.h>
+#include <linux/uaccess.h>
+#include <linux/kref.h>
+
+/* Addresses to scan */
+static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
+
+/* Insmod parameters */
+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) ")");
+
+enum chips { fscpos, fscher, fscscy, fschrc, fschmd, fschds, fscsyl };
+
+/*
+ * The FSCHMD registers and other defines
+ */
+
+/* chip identification */
+#define FSCHMD_REG_IDENT_0 0x00
+#define FSCHMD_REG_IDENT_1 0x01
+#define FSCHMD_REG_IDENT_2 0x02
+#define FSCHMD_REG_REVISION 0x03
+
+/* global control and status */
+#define FSCHMD_REG_EVENT_STATE 0x04
+#define FSCHMD_REG_CONTROL 0x05
+
+#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 };
+
+#define FSCHMD_WDOG_CONTROL_TRIGGER 0x10
+#define FSCHMD_WDOG_CONTROL_STARTED 0x10 /* the same as trigger */
+#define FSCHMD_WDOG_CONTROL_STOP 0x20
+#define FSCHMD_WDOG_CONTROL_RESOLUTION 0x40
+
+#define FSCHMD_WDOG_STATE_CARDRESET 0x02
+
+/* voltages, weird order is to keep the same order as the old drivers */
+static const u8 FSCHMD_REG_VOLT[7][6] = {
+ { 0x45, 0x42, 0x48 }, /* pos */
+ { 0x45, 0x42, 0x48 }, /* her */
+ { 0x45, 0x42, 0x48 }, /* scy */
+ { 0x45, 0x42, 0x48 }, /* hrc */
+ { 0x45, 0x42, 0x48 }, /* hmd */
+ { 0x21, 0x20, 0x22 }, /* hds */
+ { 0x21, 0x20, 0x22, 0x23, 0x24, 0x25 }, /* syl */
+};
+
+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.
+ */
+static const u8 FSCHMD_REG_FAN_MIN[7][7] = {
+ { 0x55, 0x65 }, /* pos */
+ { 0x55, 0x65, 0xb5 }, /* her */
+ { 0x65, 0x65, 0x55, 0xa5, 0x55, 0xa5 }, /* scy */
+ { 0x55, 0x65, 0xa5, 0xb5 }, /* hrc */
+ { 0x55, 0x65, 0xa5, 0xb5, 0xc5 }, /* hmd */
+ { 0x55, 0x65, 0xa5, 0xb5, 0xc5 }, /* hds */
+ { 0x54, 0x64, 0x74, 0x84, 0x94, 0xa4, 0xb4 }, /* syl */
+};
+
+/* actual fan speed */
+static const u8 FSCHMD_REG_FAN_ACT[7][7] = {
+ { 0x0e, 0x6b, 0xab }, /* pos */
+ { 0x0e, 0x6b, 0xbb }, /* her */
+ { 0x6b, 0x6c, 0x0e, 0xab, 0x5c, 0xbb }, /* scy */
+ { 0x0e, 0x6b, 0xab, 0xbb }, /* hrc */
+ { 0x5b, 0x6b, 0xab, 0xbb, 0xcb }, /* hmd */
+ { 0x5b, 0x6b, 0xab, 0xbb, 0xcb }, /* hds */
+ { 0x57, 0x67, 0x77, 0x87, 0x97, 0xa7, 0xb7 }, /* syl */
+};
+
+/* fan status registers */
+static const u8 FSCHMD_REG_FAN_STATE[7][7] = {
+ { 0x0d, 0x62, 0xa2 }, /* pos */
+ { 0x0d, 0x62, 0xb2 }, /* her */
+ { 0x62, 0x61, 0x0d, 0xa2, 0x52, 0xb2 }, /* scy */
+ { 0x0d, 0x62, 0xa2, 0xb2 }, /* hrc */
+ { 0x52, 0x62, 0xa2, 0xb2, 0xc2 }, /* hmd */
+ { 0x52, 0x62, 0xa2, 0xb2, 0xc2 }, /* hds */
+ { 0x50, 0x60, 0x70, 0x80, 0x90, 0xa0, 0xb0 }, /* syl */
+};
+
+/* fan ripple / divider registers */
+static const u8 FSCHMD_REG_FAN_RIPPLE[7][7] = {
+ { 0x0f, 0x6f, 0xaf }, /* pos */
+ { 0x0f, 0x6f, 0xbf }, /* her */
+ { 0x6f, 0x6f, 0x0f, 0xaf, 0x0f, 0xbf }, /* scy */
+ { 0x0f, 0x6f, 0xaf, 0xbf }, /* hrc */
+ { 0x5f, 0x6f, 0xaf, 0xbf, 0xcf }, /* hmd */
+ { 0x5f, 0x6f, 0xaf, 0xbf, 0xcf }, /* hds */
+ { 0x56, 0x66, 0x76, 0x86, 0x96, 0xa6, 0xb6 }, /* syl */
+};
+
+static const int FSCHMD_NO_FAN_SENSORS[7] = { 3, 3, 6, 4, 5, 5, 7 };
+
+/* Fan status register bitmasks */
+#define FSCHMD_FAN_ALARM 0x04 /* called fault by FSC! */
+#define FSCHMD_FAN_NOT_PRESENT 0x08
+#define FSCHMD_FAN_DISABLED 0x80
+
+
+/* actual temperature registers */
+static const u8 FSCHMD_REG_TEMP_ACT[7][11] = {
+ { 0x64, 0x32, 0x35 }, /* pos */
+ { 0x64, 0x32, 0x35 }, /* her */
+ { 0x64, 0xD0, 0x32, 0x35 }, /* scy */
+ { 0x64, 0x32, 0x35 }, /* hrc */
+ { 0x70, 0x80, 0x90, 0xd0, 0xe0 }, /* hmd */
+ { 0x70, 0x80, 0x90, 0xd0, 0xe0 }, /* hds */
+ { 0x58, 0x68, 0x78, 0x88, 0x98, 0xa8, /* syl */
+ 0xb8, 0xc8, 0xd8, 0xe8, 0xf8 },
+};
+
+/* temperature state registers */
+static const u8 FSCHMD_REG_TEMP_STATE[7][11] = {
+ { 0x71, 0x81, 0x91 }, /* pos */
+ { 0x71, 0x81, 0x91 }, /* her */
+ { 0x71, 0xd1, 0x81, 0x91 }, /* scy */
+ { 0x71, 0x81, 0x91 }, /* hrc */
+ { 0x71, 0x81, 0x91, 0xd1, 0xe1 }, /* hmd */
+ { 0x71, 0x81, 0x91, 0xd1, 0xe1 }, /* hds */
+ { 0x59, 0x69, 0x79, 0x89, 0x99, 0xa9, /* syl */
+ 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??
+ */
+static const u8 FSCHMD_REG_TEMP_LIMIT[7][11] = {
+ { 0, 0, 0 }, /* pos */
+ { 0x76, 0x86, 0x96 }, /* her */
+ { 0x76, 0xd6, 0x86, 0x96 }, /* scy */
+ { 0x76, 0x86, 0x96 }, /* hrc */
+ { 0x76, 0x86, 0x96, 0xd6, 0xe6 }, /* hmd */
+ { 0x76, 0x86, 0x96, 0xd6, 0xe6 }, /* hds */
+ { 0x5a, 0x6a, 0x7a, 0x8a, 0x9a, 0xaa, /* syl */
+ 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 };
+ */
+
+static const int FSCHMD_NO_TEMP_SENSORS[7] = { 3, 3, 4, 3, 5, 5, 11 };
+
+/* temp status register bitmasks */
+#define FSCHMD_TEMP_WORKING 0x01
+#define FSCHMD_TEMP_ALERT 0x02
+#define FSCHMD_TEMP_DISABLED 0x80
+/* there only really is an alarm if the sensor is working and alert == 1 */
+#define FSCHMD_TEMP_ALARM_MASK \
+ (FSCHMD_TEMP_WORKING | FSCHMD_TEMP_ALERT)
+
+/*
+ * Functions declarations
+ */
+
+static int fschmd_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int fschmd_detect(struct i2c_client *client,
+ struct i2c_board_info *info);
+static int fschmd_remove(struct i2c_client *client);
+static struct fschmd_data *fschmd_update_device(struct device *dev);
+
+/*
+ * Driver data (common to all clients)
+ */
+
+static const struct i2c_device_id fschmd_id[] = {
+ { "fscpos", fscpos },
+ { "fscher", fscher },
+ { "fscscy", fscscy },
+ { "fschrc", fschrc },
+ { "fschmd", fschmd },
+ { "fschds", fschds },
+ { "fscsyl", fscsyl },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, fschmd_id);
+
+static struct i2c_driver fschmd_driver = {
+ .class = I2C_CLASS_HWMON,
+ .driver = {
+ .name = "fschmd",
+ },
+ .probe = fschmd_probe,
+ .remove = fschmd_remove,
+ .id_table = fschmd_id,
+ .detect = fschmd_detect,
+ .address_list = normal_i2c,
+};
+
+/*
+ * Client data (each client gets its own)
+ */
+
+struct fschmd_data {
+ struct i2c_client *client;
+ struct device *hwmon_dev;
+ struct mutex update_lock;
+ struct mutex watchdog_lock;
+ struct list_head list; /* member of the watchdog_data_list */
+ struct kref kref;
+ struct miscdevice watchdog_miscdev;
+ enum chips kind;
+ unsigned long watchdog_is_open;
+ char watchdog_expect_close;
+ char watchdog_name[10]; /* must be unique to avoid sysfs conflict */
+ char valid; /* zero until following fields are valid */
+ unsigned long last_updated; /* in jiffies */
+
+ /* register values */
+ u8 revision; /* chip revision */
+ u8 global_control; /* global control register */
+ u8 watchdog_control; /* watchdog control register */
+ u8 watchdog_state; /* watchdog status register */
+ u8 watchdog_preset; /* watchdog counter preset on trigger val */
+ u8 volt[6]; /* voltage */
+ u8 temp_act[11]; /* temperature */
+ u8 temp_status[11]; /* status of sensor */
+ u8 temp_max[11]; /* high temp limit, notice: undocumented! */
+ u8 fan_act[7]; /* fans revolutions per second */
+ u8 fan_status[7]; /* fan status */
+ u8 fan_min[7]; /* fan min value for rps */
+ 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.
+ */
+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.
+ */
+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
+ */
+static void fschmd_release_resources(struct kref *ref)
+{
+ struct fschmd_data *data = container_of(ref, struct fschmd_data, kref);
+ kfree(data);
+}
+
+/*
+ * Sysfs attr show / store functions
+ */
+
+static ssize_t show_in_value(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ const int max_reading[3] = { 14200, 6600, 3300 };
+ int index = to_sensor_dev_attr(devattr)->index;
+ struct fschmd_data *data = fschmd_update_device(dev);
+
+ if (data->kind == fscher || data->kind >= fschrc)
+ return sprintf(buf, "%d\n", (data->volt[index] * dmi_vref *
+ dmi_mult[index]) / 255 + dmi_offset[index]);
+ else
+ return sprintf(buf, "%d\n", (data->volt[index] *
+ max_reading[index] + 128) / 255);
+}
+
+
+#define TEMP_FROM_REG(val) (((val) - 128) * 1000)
+
+static ssize_t show_temp_value(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ int index = to_sensor_dev_attr(devattr)->index;
+ struct fschmd_data *data = fschmd_update_device(dev);
+
+ return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_act[index]));
+}
+
+static ssize_t show_temp_max(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ int index = to_sensor_dev_attr(devattr)->index;
+ struct fschmd_data *data = fschmd_update_device(dev);
+
+ return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[index]));
+}
+
+static ssize_t store_temp_max(struct device *dev, struct device_attribute
+ *devattr, const char *buf, size_t count)
+{
+ int index = to_sensor_dev_attr(devattr)->index;
+ struct fschmd_data *data = dev_get_drvdata(dev);
+ long v;
+ int err;
+
+ 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),
+ FSCHMD_REG_TEMP_LIMIT[data->kind][index], v);
+ data->temp_max[index] = v;
+ mutex_unlock(&data->update_lock);
+
+ return count;
+}
+
+static ssize_t show_temp_fault(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ int index = to_sensor_dev_attr(devattr)->index;
+ struct fschmd_data *data = fschmd_update_device(dev);
+
+ /* bit 0 set means sensor working ok, so no fault! */
+ if (data->temp_status[index] & FSCHMD_TEMP_WORKING)
+ return sprintf(buf, "0\n");
+ else
+ return sprintf(buf, "1\n");
+}
+
+static ssize_t show_temp_alarm(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ int index = to_sensor_dev_attr(devattr)->index;
+ struct fschmd_data *data = fschmd_update_device(dev);
+
+ if ((data->temp_status[index] & FSCHMD_TEMP_ALARM_MASK) ==
+ FSCHMD_TEMP_ALARM_MASK)
+ return sprintf(buf, "1\n");
+ else
+ return sprintf(buf, "0\n");
+}
+
+
+#define RPM_FROM_REG(val) ((val) * 60)
+
+static ssize_t show_fan_value(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ int index = to_sensor_dev_attr(devattr)->index;
+ struct fschmd_data *data = fschmd_update_device(dev);
+
+ return sprintf(buf, "%u\n", RPM_FROM_REG(data->fan_act[index]));
+}
+
+static ssize_t show_fan_div(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ int index = to_sensor_dev_attr(devattr)->index;
+ struct fschmd_data *data = fschmd_update_device(dev);
+
+ /* bits 2..7 reserved => mask with 3 */
+ return sprintf(buf, "%d\n", 1 << (data->fan_ripple[index] & 3));
+}
+
+static ssize_t store_fan_div(struct device *dev, struct device_attribute
+ *devattr, const char *buf, size_t count)
+{
+ u8 reg;
+ int index = to_sensor_dev_attr(devattr)->index;
+ struct fschmd_data *data = dev_get_drvdata(dev);
+ /* supported values: 2, 4, 8 */
+ 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;
+ default:
+ dev_err(dev,
+ "fan_div value %lu not supported. Choose one of 2, 4 or 8!\n",
+ v);
+ return -EINVAL;
+ }
+
+ mutex_lock(&data->update_lock);
+
+ reg = i2c_smbus_read_byte_data(to_i2c_client(dev),
+ FSCHMD_REG_FAN_RIPPLE[data->kind][index]);
+
+ /* bits 2..7 reserved => mask with 0x03 */
+ reg &= ~0x03;
+ reg |= v;
+
+ i2c_smbus_write_byte_data(to_i2c_client(dev),
+ FSCHMD_REG_FAN_RIPPLE[data->kind][index], reg);
+
+ data->fan_ripple[index] = reg;
+
+ mutex_unlock(&data->update_lock);
+
+ return count;
+}
+
+static ssize_t show_fan_alarm(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ int index = to_sensor_dev_attr(devattr)->index;
+ struct fschmd_data *data = fschmd_update_device(dev);
+
+ if (data->fan_status[index] & FSCHMD_FAN_ALARM)
+ return sprintf(buf, "1\n");
+ else
+ return sprintf(buf, "0\n");
+}
+
+static ssize_t show_fan_fault(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ int index = to_sensor_dev_attr(devattr)->index;
+ struct fschmd_data *data = fschmd_update_device(dev);
+
+ if (data->fan_status[index] & FSCHMD_FAN_NOT_PRESENT)
+ return sprintf(buf, "1\n");
+ else
+ return sprintf(buf, "0\n");
+}
+
+
+static ssize_t show_pwm_auto_point1_pwm(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ int index = to_sensor_dev_attr(devattr)->index;
+ struct fschmd_data *data = fschmd_update_device(dev);
+ int val = data->fan_min[index];
+
+ /* 0 = allow turning off (except on the syl), 1-255 = 50-100% */
+ if (val || data->kind == fscsyl)
+ val = val / 2 + 128;
+
+ return sprintf(buf, "%d\n", val);
+}
+
+static ssize_t store_pwm_auto_point1_pwm(struct device *dev,
+ struct device_attribute *devattr, const char *buf, size_t count)
+{
+ int index = to_sensor_dev_attr(devattr)->index;
+ struct fschmd_data *data = dev_get_drvdata(dev);
+ 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 = clamp_val(v, 128, 255);
+ v = (v - 128) * 2 + 1;
+ }
+
+ mutex_lock(&data->update_lock);
+
+ i2c_smbus_write_byte_data(to_i2c_client(dev),
+ FSCHMD_REG_FAN_MIN[data->kind][index], v);
+ data->fan_min[index] = v;
+
+ mutex_unlock(&data->update_lock);
+
+ return count;
+}
+
+
+/*
+ * 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)
+{
+ struct fschmd_data *data = fschmd_update_device(dev);
+
+ if (data->global_control & FSCHMD_CONTROL_ALERT_LED)
+ return sprintf(buf, "1\n");
+ else
+ return sprintf(buf, "0\n");
+}
+
+static ssize_t store_alert_led(struct device *dev,
+ struct device_attribute *devattr, const char *buf, size_t count)
+{
+ u8 reg;
+ struct fschmd_data *data = dev_get_drvdata(dev);
+ unsigned long v;
+ int err;
+
+ err = kstrtoul(buf, 10, &v);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+
+ reg = i2c_smbus_read_byte_data(to_i2c_client(dev), FSCHMD_REG_CONTROL);
+
+ if (v)
+ reg |= FSCHMD_CONTROL_ALERT_LED;
+ else
+ reg &= ~FSCHMD_CONTROL_ALERT_LED;
+
+ i2c_smbus_write_byte_data(to_i2c_client(dev), FSCHMD_REG_CONTROL, reg);
+
+ data->global_control = reg;
+
+ mutex_unlock(&data->update_lock);
+
+ return count;
+}
+
+static DEVICE_ATTR(alert_led, 0644, show_alert_led, store_alert_led);
+
+static struct sensor_device_attribute fschmd_attr[] = {
+ SENSOR_ATTR(in0_input, 0444, show_in_value, NULL, 0),
+ SENSOR_ATTR(in1_input, 0444, show_in_value, NULL, 1),
+ SENSOR_ATTR(in2_input, 0444, show_in_value, NULL, 2),
+ SENSOR_ATTR(in3_input, 0444, show_in_value, NULL, 3),
+ SENSOR_ATTR(in4_input, 0444, show_in_value, NULL, 4),
+ SENSOR_ATTR(in5_input, 0444, show_in_value, NULL, 5),
+};
+
+static struct sensor_device_attribute fschmd_temp_attr[] = {
+ SENSOR_ATTR(temp1_input, 0444, show_temp_value, NULL, 0),
+ SENSOR_ATTR(temp1_max, 0644, show_temp_max, store_temp_max, 0),
+ SENSOR_ATTR(temp1_fault, 0444, show_temp_fault, NULL, 0),
+ SENSOR_ATTR(temp1_alarm, 0444, show_temp_alarm, NULL, 0),
+ SENSOR_ATTR(temp2_input, 0444, show_temp_value, NULL, 1),
+ SENSOR_ATTR(temp2_max, 0644, show_temp_max, store_temp_max, 1),
+ SENSOR_ATTR(temp2_fault, 0444, show_temp_fault, NULL, 1),
+ SENSOR_ATTR(temp2_alarm, 0444, show_temp_alarm, NULL, 1),
+ SENSOR_ATTR(temp3_input, 0444, show_temp_value, NULL, 2),
+ SENSOR_ATTR(temp3_max, 0644, show_temp_max, store_temp_max, 2),
+ SENSOR_ATTR(temp3_fault, 0444, show_temp_fault, NULL, 2),
+ SENSOR_ATTR(temp3_alarm, 0444, show_temp_alarm, NULL, 2),
+ SENSOR_ATTR(temp4_input, 0444, show_temp_value, NULL, 3),
+ SENSOR_ATTR(temp4_max, 0644, show_temp_max, store_temp_max, 3),
+ SENSOR_ATTR(temp4_fault, 0444, show_temp_fault, NULL, 3),
+ SENSOR_ATTR(temp4_alarm, 0444, show_temp_alarm, NULL, 3),
+ SENSOR_ATTR(temp5_input, 0444, show_temp_value, NULL, 4),
+ SENSOR_ATTR(temp5_max, 0644, show_temp_max, store_temp_max, 4),
+ SENSOR_ATTR(temp5_fault, 0444, show_temp_fault, NULL, 4),
+ SENSOR_ATTR(temp5_alarm, 0444, show_temp_alarm, NULL, 4),
+ SENSOR_ATTR(temp6_input, 0444, show_temp_value, NULL, 5),
+ SENSOR_ATTR(temp6_max, 0644, show_temp_max, store_temp_max, 5),
+ SENSOR_ATTR(temp6_fault, 0444, show_temp_fault, NULL, 5),
+ SENSOR_ATTR(temp6_alarm, 0444, show_temp_alarm, NULL, 5),
+ SENSOR_ATTR(temp7_input, 0444, show_temp_value, NULL, 6),
+ SENSOR_ATTR(temp7_max, 0644, show_temp_max, store_temp_max, 6),
+ SENSOR_ATTR(temp7_fault, 0444, show_temp_fault, NULL, 6),
+ SENSOR_ATTR(temp7_alarm, 0444, show_temp_alarm, NULL, 6),
+ SENSOR_ATTR(temp8_input, 0444, show_temp_value, NULL, 7),
+ SENSOR_ATTR(temp8_max, 0644, show_temp_max, store_temp_max, 7),
+ SENSOR_ATTR(temp8_fault, 0444, show_temp_fault, NULL, 7),
+ SENSOR_ATTR(temp8_alarm, 0444, show_temp_alarm, NULL, 7),
+ SENSOR_ATTR(temp9_input, 0444, show_temp_value, NULL, 8),
+ SENSOR_ATTR(temp9_max, 0644, show_temp_max, store_temp_max, 8),
+ SENSOR_ATTR(temp9_fault, 0444, show_temp_fault, NULL, 8),
+ SENSOR_ATTR(temp9_alarm, 0444, show_temp_alarm, NULL, 8),
+ SENSOR_ATTR(temp10_input, 0444, show_temp_value, NULL, 9),
+ SENSOR_ATTR(temp10_max, 0644, show_temp_max, store_temp_max, 9),
+ SENSOR_ATTR(temp10_fault, 0444, show_temp_fault, NULL, 9),
+ SENSOR_ATTR(temp10_alarm, 0444, show_temp_alarm, NULL, 9),
+ SENSOR_ATTR(temp11_input, 0444, show_temp_value, NULL, 10),
+ SENSOR_ATTR(temp11_max, 0644, show_temp_max, store_temp_max, 10),
+ SENSOR_ATTR(temp11_fault, 0444, show_temp_fault, NULL, 10),
+ SENSOR_ATTR(temp11_alarm, 0444, show_temp_alarm, NULL, 10),
+};
+
+static struct sensor_device_attribute fschmd_fan_attr[] = {
+ SENSOR_ATTR(fan1_input, 0444, show_fan_value, NULL, 0),
+ SENSOR_ATTR(fan1_div, 0644, show_fan_div, store_fan_div, 0),
+ SENSOR_ATTR(fan1_alarm, 0444, show_fan_alarm, NULL, 0),
+ SENSOR_ATTR(fan1_fault, 0444, show_fan_fault, NULL, 0),
+ SENSOR_ATTR(pwm1_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
+ store_pwm_auto_point1_pwm, 0),
+ SENSOR_ATTR(fan2_input, 0444, show_fan_value, NULL, 1),
+ SENSOR_ATTR(fan2_div, 0644, show_fan_div, store_fan_div, 1),
+ SENSOR_ATTR(fan2_alarm, 0444, show_fan_alarm, NULL, 1),
+ SENSOR_ATTR(fan2_fault, 0444, show_fan_fault, NULL, 1),
+ SENSOR_ATTR(pwm2_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
+ store_pwm_auto_point1_pwm, 1),
+ SENSOR_ATTR(fan3_input, 0444, show_fan_value, NULL, 2),
+ SENSOR_ATTR(fan3_div, 0644, show_fan_div, store_fan_div, 2),
+ SENSOR_ATTR(fan3_alarm, 0444, show_fan_alarm, NULL, 2),
+ SENSOR_ATTR(fan3_fault, 0444, show_fan_fault, NULL, 2),
+ SENSOR_ATTR(pwm3_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
+ store_pwm_auto_point1_pwm, 2),
+ SENSOR_ATTR(fan4_input, 0444, show_fan_value, NULL, 3),
+ SENSOR_ATTR(fan4_div, 0644, show_fan_div, store_fan_div, 3),
+ SENSOR_ATTR(fan4_alarm, 0444, show_fan_alarm, NULL, 3),
+ SENSOR_ATTR(fan4_fault, 0444, show_fan_fault, NULL, 3),
+ SENSOR_ATTR(pwm4_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
+ store_pwm_auto_point1_pwm, 3),
+ SENSOR_ATTR(fan5_input, 0444, show_fan_value, NULL, 4),
+ SENSOR_ATTR(fan5_div, 0644, show_fan_div, store_fan_div, 4),
+ SENSOR_ATTR(fan5_alarm, 0444, show_fan_alarm, NULL, 4),
+ SENSOR_ATTR(fan5_fault, 0444, show_fan_fault, NULL, 4),
+ SENSOR_ATTR(pwm5_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
+ store_pwm_auto_point1_pwm, 4),
+ SENSOR_ATTR(fan6_input, 0444, show_fan_value, NULL, 5),
+ SENSOR_ATTR(fan6_div, 0644, show_fan_div, store_fan_div, 5),
+ SENSOR_ATTR(fan6_alarm, 0444, show_fan_alarm, NULL, 5),
+ SENSOR_ATTR(fan6_fault, 0444, show_fan_fault, NULL, 5),
+ SENSOR_ATTR(pwm6_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
+ store_pwm_auto_point1_pwm, 5),
+ SENSOR_ATTR(fan7_input, 0444, show_fan_value, NULL, 6),
+ SENSOR_ATTR(fan7_div, 0644, show_fan_div, store_fan_div, 6),
+ SENSOR_ATTR(fan7_alarm, 0444, show_fan_alarm, NULL, 6),
+ SENSOR_ATTR(fan7_fault, 0444, show_fan_fault, NULL, 6),
+ SENSOR_ATTR(pwm7_auto_point1_pwm, 0644, show_pwm_auto_point1_pwm,
+ store_pwm_auto_point1_pwm, 6),
+};
+
+
+/*
+ * Watchdog routines
+ */
+
+static int watchdog_set_timeout(struct fschmd_data *data, int timeout)
+{
+ int ret, resolution;
+ int kind = data->kind + 1; /* 0-x array index -> 1-x module param */
+
+ /* 2 second or 60 second resolution? */
+ if (timeout <= 510 || kind == fscpos || kind == fscscy)
+ resolution = 2;
+ else
+ resolution = 60;
+
+ if (timeout < resolution || timeout > (resolution * 255))
+ return -EINVAL;
+
+ mutex_lock(&data->watchdog_lock);
+ if (!data->client) {
+ ret = -ENODEV;
+ goto leave;
+ }
+
+ if (resolution == 2)
+ data->watchdog_control &= ~FSCHMD_WDOG_CONTROL_RESOLUTION;
+ else
+ data->watchdog_control |= FSCHMD_WDOG_CONTROL_RESOLUTION;
+
+ data->watchdog_preset = DIV_ROUND_UP(timeout, resolution);
+
+ /* Write new timeout value */
+ i2c_smbus_write_byte_data(data->client,
+ FSCHMD_REG_WDOG_PRESET[data->kind], data->watchdog_preset);
+ /* Write new control register, do not trigger! */
+ i2c_smbus_write_byte_data(data->client,
+ FSCHMD_REG_WDOG_CONTROL[data->kind],
+ data->watchdog_control & ~FSCHMD_WDOG_CONTROL_TRIGGER);
+
+ ret = data->watchdog_preset * resolution;
+
+leave:
+ mutex_unlock(&data->watchdog_lock);
+ return ret;
+}
+
+static int watchdog_get_timeout(struct fschmd_data *data)
+{
+ int timeout;
+
+ mutex_lock(&data->watchdog_lock);
+ if (data->watchdog_control & FSCHMD_WDOG_CONTROL_RESOLUTION)
+ timeout = data->watchdog_preset * 60;
+ else
+ timeout = data->watchdog_preset * 2;
+ mutex_unlock(&data->watchdog_lock);
+
+ return timeout;
+}
+
+static int watchdog_trigger(struct fschmd_data *data)
+{
+ int ret = 0;
+
+ mutex_lock(&data->watchdog_lock);
+ if (!data->client) {
+ ret = -ENODEV;
+ goto leave;
+ }
+
+ data->watchdog_control |= FSCHMD_WDOG_CONTROL_TRIGGER;
+ i2c_smbus_write_byte_data(data->client,
+ FSCHMD_REG_WDOG_CONTROL[data->kind],
+ data->watchdog_control);
+leave:
+ mutex_unlock(&data->watchdog_lock);
+ return ret;
+}
+
+static int watchdog_stop(struct fschmd_data *data)
+{
+ int ret = 0;
+
+ mutex_lock(&data->watchdog_lock);
+ if (!data->client) {
+ ret = -ENODEV;
+ goto leave;
+ }
+
+ 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)
+ */
+ i2c_smbus_write_byte_data(data->client,
+ FSCHMD_REG_WDOG_CONTROL[data->kind],
+ data->watchdog_control | FSCHMD_WDOG_CONTROL_STOP);
+leave:
+ mutex_unlock(&data->watchdog_lock);
+ return ret;
+}
+
+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.
+ */
+ if (!mutex_trylock(&watchdog_data_mutex))
+ return -ERESTARTSYS;
+ list_for_each_entry(pos, &watchdog_data_list, list) {
+ if (pos->watchdog_miscdev.minor == iminor(inode)) {
+ data = pos;
+ break;
+ }
+ }
+ /* Note we can never not have found data, so we don't check for this */
+ watchdog_is_open = test_and_set_bit(0, &data->watchdog_is_open);
+ if (!watchdog_is_open)
+ kref_get(&data->kref);
+ mutex_unlock(&watchdog_data_mutex);
+
+ if (watchdog_is_open)
+ return -EBUSY;
+
+ /* Start the watchdog */
+ watchdog_trigger(data);
+ filp->private_data = data;
+
+ return nonseekable_open(inode, filp);
+}
+
+static int watchdog_release(struct inode *inode, struct file *filp)
+{
+ struct fschmd_data *data = filp->private_data;
+
+ if (data->watchdog_expect_close) {
+ watchdog_stop(data);
+ data->watchdog_expect_close = 0;
+ } else {
+ watchdog_trigger(data);
+ dev_crit(&data->client->dev,
+ "unexpected close, not stopping watchdog!\n");
+ }
+
+ clear_bit(0, &data->watchdog_is_open);
+
+ mutex_lock(&watchdog_data_mutex);
+ kref_put(&data->kref, fschmd_release_resources);
+ mutex_unlock(&watchdog_data_mutex);
+
+ return 0;
+}
+
+static ssize_t watchdog_write(struct file *filp, const char __user *buf,
+ size_t count, loff_t *offset)
+{
+ int ret;
+ struct fschmd_data *data = filp->private_data;
+
+ if (count) {
+ if (!nowayout) {
+ size_t i;
+
+ /* Clear it in case it was set with a previous write */
+ data->watchdog_expect_close = 0;
+
+ for (i = 0; i != count; i++) {
+ char c;
+ if (get_user(c, buf + i))
+ return -EFAULT;
+ if (c == 'V')
+ data->watchdog_expect_close = 1;
+ }
+ }
+ ret = watchdog_trigger(data);
+ if (ret < 0)
+ return ret;
+ }
+ return count;
+}
+
+static long watchdog_ioctl(struct file *filp, unsigned int cmd,
+ unsigned long arg)
+{
+ struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT |
+ WDIOF_CARDRESET,
+ .identity = "FSC watchdog"
+ };
+ int i, ret = 0;
+ struct fschmd_data *data = filp->private_data;
+
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ ident.firmware_version = data->revision;
+ if (!nowayout)
+ ident.options |= WDIOF_MAGICCLOSE;
+ if (copy_to_user((void __user *)arg, &ident, sizeof(ident)))
+ ret = -EFAULT;
+ break;
+
+ case WDIOC_GETSTATUS:
+ ret = put_user(0, (int __user *)arg);
+ break;
+
+ case WDIOC_GETBOOTSTATUS:
+ if (data->watchdog_state & FSCHMD_WDOG_STATE_CARDRESET)
+ ret = put_user(WDIOF_CARDRESET, (int __user *)arg);
+ else
+ ret = put_user(0, (int __user *)arg);
+ break;
+
+ case WDIOC_KEEPALIVE:
+ ret = watchdog_trigger(data);
+ break;
+
+ case WDIOC_GETTIMEOUT:
+ i = watchdog_get_timeout(data);
+ ret = put_user(i, (int __user *)arg);
+ break;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(i, (int __user *)arg)) {
+ ret = -EFAULT;
+ break;
+ }
+ ret = watchdog_set_timeout(data, i);
+ if (ret > 0)
+ ret = put_user(ret, (int __user *)arg);
+ break;
+
+ case WDIOC_SETOPTIONS:
+ if (get_user(i, (int __user *)arg)) {
+ ret = -EFAULT;
+ break;
+ }
+
+ if (i & WDIOS_DISABLECARD)
+ ret = watchdog_stop(data);
+ else if (i & WDIOS_ENABLECARD)
+ ret = watchdog_trigger(data);
+ else
+ ret = -EINVAL;
+
+ break;
+ default:
+ ret = -ENOTTY;
+ }
+ return ret;
+}
+
+static const struct file_operations watchdog_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .open = watchdog_open,
+ .release = watchdog_release,
+ .write = watchdog_write,
+ .unlocked_ioctl = watchdog_ioctl,
+};
+
+
+/*
+ * 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.
+ */
+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
+ */
+ 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
+ */
+ 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
+ */
+ 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) {
+ /* Our in sensors order and the DMI order differ */
+ const int shuffle[3] = { 1, 0, 2 };
+ int in = shuffle[dmi_data[i] - 1];
+
+ /* Check for twice the same entity */
+ if (found & (1 << in))
+ return;
+
+ mult[in] = dmi_data[i + 1] | (dmi_data[i + 2] << 8);
+ offset[in] = dmi_data[i + 3] | (dmi_data[i + 4] << 8);
+
+ found |= 1 << in;
+ }
+
+ /* entity 7: reference voltage */
+ if (dmi_data[i] == 7) {
+ /* Check for twice the same entity */
+ if (found & 0x08)
+ return;
+
+ vref = dmi_data[i + 1] | (dmi_data[i + 2] << 8);
+
+ found |= 0x08;
+ }
+ }
+
+ if (found == 0x0F) {
+ for (i = 0; i < 3; i++) {
+ 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
+ */
+ dmi_mult[3] = dmi_mult[2];
+ dmi_mult[4] = dmi_mult[1];
+ dmi_mult[5] = dmi_mult[2];
+ dmi_offset[3] = dmi_offset[2];
+ dmi_offset[4] = dmi_offset[1];
+ dmi_offset[5] = dmi_offset[2];
+ dmi_vref = vref;
+ }
+}
+
+static int fschmd_detect(struct i2c_client *client,
+ struct i2c_board_info *info)
+{
+ enum chips kind;
+ struct i2c_adapter *adapter = client->adapter;
+ char id[4];
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -ENODEV;
+
+ /* Detect & Identify the chip */
+ id[0] = i2c_smbus_read_byte_data(client, FSCHMD_REG_IDENT_0);
+ id[1] = i2c_smbus_read_byte_data(client, FSCHMD_REG_IDENT_1);
+ id[2] = i2c_smbus_read_byte_data(client, FSCHMD_REG_IDENT_2);
+ id[3] = '\0';
+
+ if (!strcmp(id, "PEG"))
+ kind = fscpos;
+ else if (!strcmp(id, "HER"))
+ kind = fscher;
+ else if (!strcmp(id, "SCY"))
+ kind = fscscy;
+ else if (!strcmp(id, "HRC"))
+ kind = fschrc;
+ else if (!strcmp(id, "HMD"))
+ kind = fschmd;
+ else if (!strcmp(id, "HDS"))
+ kind = fschds;
+ else if (!strcmp(id, "SYL"))
+ kind = fscsyl;
+ else
+ return -ENODEV;
+
+ strlcpy(info->type, fschmd_id[kind].name, I2C_NAME_SIZE);
+
+ return 0;
+}
+
+static int fschmd_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct fschmd_data *data;
+ const char * const names[7] = { "Poseidon", "Hermes", "Scylla",
+ "Heracles", "Heimdall", "Hades", "Syleus" };
+ const int watchdog_minors[] = { WATCHDOG_MINOR, 212, 213, 214, 215 };
+ int i, err;
+ enum chips kind = id->driver_data;
+
+ data = kzalloc(sizeof(struct fschmd_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ i2c_set_clientdata(client, data);
+ mutex_init(&data->update_lock);
+ 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)
+ */
+ data->client = client;
+ data->kind = kind;
+
+ if (kind == fscpos) {
+ /*
+ * 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;
+ }
+
+ /* Read the special DMI table for fscher and newer chips */
+ if ((kind == fscher || kind >= fschrc) && dmi_vref == -1) {
+ dmi_walk(fschmd_dmi_decode, NULL);
+ if (dmi_vref == -1) {
+ dev_warn(&client->dev,
+ "Couldn't get voltage scaling factors from "
+ "BIOS DMI table, using builtin defaults\n");
+ dmi_vref = 33;
+ }
+ }
+
+ /* Read in some never changing registers */
+ data->revision = i2c_smbus_read_byte_data(client, FSCHMD_REG_REVISION);
+ data->global_control = i2c_smbus_read_byte_data(client,
+ FSCHMD_REG_CONTROL);
+ data->watchdog_control = i2c_smbus_read_byte_data(client,
+ FSCHMD_REG_WDOG_CONTROL[data->kind]);
+ data->watchdog_state = i2c_smbus_read_byte_data(client,
+ FSCHMD_REG_WDOG_STATE[data->kind]);
+ data->watchdog_preset = i2c_smbus_read_byte_data(client,
+ FSCHMD_REG_WDOG_PRESET[data->kind]);
+
+ err = device_create_file(&client->dev, &dev_attr_alert_led);
+ if (err)
+ goto exit_detach;
+
+ for (i = 0; i < FSCHMD_NO_VOLT_SENSORS[data->kind]; i++) {
+ err = device_create_file(&client->dev,
+ &fschmd_attr[i].dev_attr);
+ if (err)
+ goto exit_detach;
+ }
+
+ for (i = 0; i < (FSCHMD_NO_TEMP_SENSORS[data->kind] * 4); i++) {
+ /* Poseidon doesn't have TEMP_LIMIT registers */
+ if (kind == fscpos && fschmd_temp_attr[i].dev_attr.show ==
+ show_temp_max)
+ continue;
+
+ if (kind == fscsyl) {
+ if (i % 4 == 0)
+ data->temp_status[i / 4] =
+ i2c_smbus_read_byte_data(client,
+ FSCHMD_REG_TEMP_STATE
+ [data->kind][i / 4]);
+ if (data->temp_status[i / 4] & FSCHMD_TEMP_DISABLED)
+ continue;
+ }
+
+ err = device_create_file(&client->dev,
+ &fschmd_temp_attr[i].dev_attr);
+ if (err)
+ goto exit_detach;
+ }
+
+ for (i = 0; i < (FSCHMD_NO_FAN_SENSORS[data->kind] * 5); i++) {
+ /* Poseidon doesn't have a FAN_MIN register for its 3rd fan */
+ if (kind == fscpos &&
+ !strcmp(fschmd_fan_attr[i].dev_attr.attr.name,
+ "pwm3_auto_point1_pwm"))
+ continue;
+
+ if (kind == fscsyl) {
+ if (i % 5 == 0)
+ data->fan_status[i / 5] =
+ i2c_smbus_read_byte_data(client,
+ FSCHMD_REG_FAN_STATE
+ [data->kind][i / 5]);
+ if (data->fan_status[i / 5] & FSCHMD_FAN_DISABLED)
+ continue;
+ }
+
+ err = device_create_file(&client->dev,
+ &fschmd_fan_attr[i].dev_attr);
+ if (err)
+ goto exit_detach;
+ }
+
+ data->hwmon_dev = hwmon_device_register(&client->dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ err = PTR_ERR(data->hwmon_dev);
+ data->hwmon_dev = NULL;
+ 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)
+ */
+ mutex_lock(&watchdog_data_mutex);
+ for (i = 0; i < ARRAY_SIZE(watchdog_minors); i++) {
+ /* Register our watchdog part */
+ snprintf(data->watchdog_name, sizeof(data->watchdog_name),
+ "watchdog%c", (i == 0) ? '\0' : ('0' + i));
+ data->watchdog_miscdev.name = data->watchdog_name;
+ data->watchdog_miscdev.fops = &watchdog_fops;
+ data->watchdog_miscdev.minor = watchdog_minors[i];
+ err = misc_register(&data->watchdog_miscdev);
+ if (err == -EBUSY)
+ continue;
+ if (err) {
+ data->watchdog_miscdev.minor = 0;
+ dev_err(&client->dev,
+ "Registering watchdog chardev: %d\n", err);
+ break;
+ }
+
+ list_add(&data->list, &watchdog_data_list);
+ watchdog_set_timeout(data, 60);
+ dev_info(&client->dev,
+ "Registered watchdog chardev major 10, minor: %d\n",
+ watchdog_minors[i]);
+ break;
+ }
+ 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");
+ }
+ mutex_unlock(&watchdog_data_mutex);
+
+ dev_info(&client->dev, "Detected FSC %s chip, revision: %d\n",
+ names[data->kind], (int) data->revision);
+
+ return 0;
+
+exit_detach:
+ fschmd_remove(client); /* will also free data for us */
+ return err;
+}
+
+static int fschmd_remove(struct i2c_client *client)
+{
+ struct fschmd_data *data = i2c_get_clientdata(client);
+ int i;
+
+ /* Unregister the watchdog (if registered) */
+ if (data->watchdog_miscdev.minor) {
+ misc_deregister(&data->watchdog_miscdev);
+ if (data->watchdog_is_open) {
+ dev_warn(&client->dev,
+ "i2c client detached with watchdog open! "
+ "Stopping watchdog.\n");
+ watchdog_stop(data);
+ }
+ mutex_lock(&watchdog_data_mutex);
+ list_del(&data->list);
+ mutex_unlock(&watchdog_data_mutex);
+ /* Tell the watchdog code the client is gone */
+ mutex_lock(&data->watchdog_lock);
+ data->client = NULL;
+ mutex_unlock(&data->watchdog_lock);
+ }
+
+ /*
+ * 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);
+
+ device_remove_file(&client->dev, &dev_attr_alert_led);
+ for (i = 0; i < (FSCHMD_NO_VOLT_SENSORS[data->kind]); i++)
+ device_remove_file(&client->dev, &fschmd_attr[i].dev_attr);
+ for (i = 0; i < (FSCHMD_NO_TEMP_SENSORS[data->kind] * 4); i++)
+ device_remove_file(&client->dev,
+ &fschmd_temp_attr[i].dev_attr);
+ for (i = 0; i < (FSCHMD_NO_FAN_SENSORS[data->kind] * 5); i++)
+ device_remove_file(&client->dev,
+ &fschmd_fan_attr[i].dev_attr);
+
+ mutex_lock(&watchdog_data_mutex);
+ kref_put(&data->kref, fschmd_release_resources);
+ mutex_unlock(&watchdog_data_mutex);
+
+ return 0;
+}
+
+static struct fschmd_data *fschmd_update_device(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct fschmd_data *data = i2c_get_clientdata(client);
+ int i;
+
+ mutex_lock(&data->update_lock);
+
+ if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
+
+ for (i = 0; i < FSCHMD_NO_TEMP_SENSORS[data->kind]; i++) {
+ data->temp_act[i] = i2c_smbus_read_byte_data(client,
+ FSCHMD_REG_TEMP_ACT[data->kind][i]);
+ data->temp_status[i] = i2c_smbus_read_byte_data(client,
+ FSCHMD_REG_TEMP_STATE[data->kind][i]);
+
+ /* The fscpos doesn't have TEMP_LIMIT registers */
+ if (FSCHMD_REG_TEMP_LIMIT[data->kind][i])
+ data->temp_max[i] = i2c_smbus_read_byte_data(
+ client,
+ FSCHMD_REG_TEMP_LIMIT[data->kind][i]);
+
+ /*
+ * 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])
+ i2c_smbus_write_byte_data(client,
+ FSCHMD_REG_TEMP_STATE[data->kind][i],
+ data->temp_status[i]);
+ }
+
+ for (i = 0; i < FSCHMD_NO_FAN_SENSORS[data->kind]; i++) {
+ data->fan_act[i] = i2c_smbus_read_byte_data(client,
+ FSCHMD_REG_FAN_ACT[data->kind][i]);
+ data->fan_status[i] = i2c_smbus_read_byte_data(client,
+ FSCHMD_REG_FAN_STATE[data->kind][i]);
+ data->fan_ripple[i] = i2c_smbus_read_byte_data(client,
+ FSCHMD_REG_FAN_RIPPLE[data->kind][i]);
+
+ /* The fscpos third fan doesn't have a fan_min */
+ if (FSCHMD_REG_FAN_MIN[data->kind][i])
+ data->fan_min[i] = i2c_smbus_read_byte_data(
+ client,
+ FSCHMD_REG_FAN_MIN[data->kind][i]);
+
+ /* reset fan status if speed is back to > 0 */
+ if ((data->fan_status[i] & FSCHMD_FAN_ALARM) &&
+ data->fan_act[i])
+ i2c_smbus_write_byte_data(client,
+ FSCHMD_REG_FAN_STATE[data->kind][i],
+ data->fan_status[i]);
+ }
+
+ for (i = 0; i < FSCHMD_NO_VOLT_SENSORS[data->kind]; i++)
+ data->volt[i] = i2c_smbus_read_byte_data(client,
+ FSCHMD_REG_VOLT[data->kind][i]);
+
+ data->last_updated = jiffies;
+ data->valid = 1;
+ }
+
+ mutex_unlock(&data->update_lock);
+
+ return data;
+}
+
+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");
Code Review / kvmfornfv.git / blobdiff