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-rw-r--r--drivers/hwmon/sis5595.c913
1 files changed, 913 insertions, 0 deletions
diff --git a/drivers/hwmon/sis5595.c b/drivers/hwmon/sis5595.c
new file mode 100644
index 0000000000..0a0479501e
--- /dev/null
+++ b/drivers/hwmon/sis5595.c
@@ -0,0 +1,913 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * sis5595.c - Part of lm_sensors, Linux kernel modules
+ * for hardware monitoring
+ *
+ * Copyright (C) 1998 - 2001 Frodo Looijaard <frodol@dds.nl>,
+ * Kyösti Mälkki <kmalkki@cc.hut.fi>, and
+ * Mark D. Studebaker <mdsxyz123@yahoo.com>
+ * Ported to Linux 2.6 by Aurelien Jarno <aurelien@aurel32.net> with
+ * the help of Jean Delvare <jdelvare@suse.de>
+ */
+
+/*
+ * SiS southbridge has a LM78-like chip integrated on the same IC.
+ * This driver is a customized copy of lm78.c
+ *
+ * Supports following revisions:
+ * Version PCI ID PCI Revision
+ * 1 1039/0008 AF or less
+ * 2 1039/0008 B0 or greater
+ *
+ * Note: these chips contain a 0008 device which is incompatible with the
+ * 5595. We recognize these by the presence of the listed
+ * "blacklist" PCI ID and refuse to load.
+ *
+ * NOT SUPPORTED PCI ID BLACKLIST PCI ID
+ * 540 0008 0540
+ * 550 0008 0550
+ * 5513 0008 5511
+ * 5581 0008 5597
+ * 5582 0008 5597
+ * 5597 0008 5597
+ * 5598 0008 5597/5598
+ * 630 0008 0630
+ * 645 0008 0645
+ * 730 0008 0730
+ * 735 0008 0735
+ */
+
+#define DRIVER_NAME "sis5595"
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/ioport.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/jiffies.h>
+#include <linux/mutex.h>
+#include <linux/sysfs.h>
+#include <linux/acpi.h>
+#include <linux/io.h>
+
+/*
+ * If force_addr is set to anything different from 0, we forcibly enable
+ * the device at the given address.
+ */
+static u16 force_addr;
+module_param(force_addr, ushort, 0);
+MODULE_PARM_DESC(force_addr,
+ "Initialize the base address of the sensors");
+
+static struct platform_device *pdev;
+
+/* Many SIS5595 constants specified below */
+
+/* Length of ISA address segment */
+#define SIS5595_EXTENT 8
+/* PCI Config Registers */
+#define SIS5595_BASE_REG 0x68
+#define SIS5595_PIN_REG 0x7A
+#define SIS5595_ENABLE_REG 0x7B
+
+/* Where are the ISA address/data registers relative to the base address */
+#define SIS5595_ADDR_REG_OFFSET 5
+#define SIS5595_DATA_REG_OFFSET 6
+
+/* The SIS5595 registers */
+#define SIS5595_REG_IN_MAX(nr) (0x2b + (nr) * 2)
+#define SIS5595_REG_IN_MIN(nr) (0x2c + (nr) * 2)
+#define SIS5595_REG_IN(nr) (0x20 + (nr))
+
+#define SIS5595_REG_FAN_MIN(nr) (0x3b + (nr))
+#define SIS5595_REG_FAN(nr) (0x28 + (nr))
+
+/*
+ * On the first version of the chip, the temp registers are separate.
+ * On the second version,
+ * TEMP pin is shared with IN4, configured in PCI register 0x7A.
+ * The registers are the same as well.
+ * OVER and HYST are really MAX and MIN.
+ */
+
+#define REV2MIN 0xb0
+#define SIS5595_REG_TEMP (((data->revision) >= REV2MIN) ? \
+ SIS5595_REG_IN(4) : 0x27)
+#define SIS5595_REG_TEMP_OVER (((data->revision) >= REV2MIN) ? \
+ SIS5595_REG_IN_MAX(4) : 0x39)
+#define SIS5595_REG_TEMP_HYST (((data->revision) >= REV2MIN) ? \
+ SIS5595_REG_IN_MIN(4) : 0x3a)
+
+#define SIS5595_REG_CONFIG 0x40
+#define SIS5595_REG_ALARM1 0x41
+#define SIS5595_REG_ALARM2 0x42
+#define SIS5595_REG_FANDIV 0x47
+
+/*
+ * Conversions. Limit checking is only done on the TO_REG
+ * variants.
+ */
+
+/*
+ * IN: mV, (0V to 4.08V)
+ * REG: 16mV/bit
+ */
+static inline u8 IN_TO_REG(unsigned long val)
+{
+ unsigned long nval = clamp_val(val, 0, 4080);
+ return (nval + 8) / 16;
+}
+#define IN_FROM_REG(val) ((val) * 16)
+
+static inline u8 FAN_TO_REG(long rpm, int div)
+{
+ if (rpm <= 0)
+ return 255;
+ if (rpm > 1350000)
+ return 1;
+ return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
+}
+
+static inline int FAN_FROM_REG(u8 val, int div)
+{
+ return val == 0 ? -1 : val == 255 ? 0 : 1350000 / (val * div);
+}
+
+/*
+ * TEMP: mC (-54.12C to +157.53C)
+ * REG: 0.83C/bit + 52.12, two's complement
+ */
+static inline int TEMP_FROM_REG(s8 val)
+{
+ return val * 830 + 52120;
+}
+static inline s8 TEMP_TO_REG(long val)
+{
+ int nval = clamp_val(val, -54120, 157530) ;
+ return nval < 0 ? (nval - 5212 - 415) / 830 : (nval - 5212 + 415) / 830;
+}
+
+/*
+ * FAN DIV: 1, 2, 4, or 8 (defaults to 2)
+ * REG: 0, 1, 2, or 3 (respectively) (defaults to 1)
+ */
+static inline u8 DIV_TO_REG(int val)
+{
+ return val == 8 ? 3 : val == 4 ? 2 : val == 1 ? 0 : 1;
+}
+#define DIV_FROM_REG(val) (1 << (val))
+
+/*
+ * For each registered chip, we need to keep some data in memory.
+ * The structure is dynamically allocated.
+ */
+struct sis5595_data {
+ unsigned short addr;
+ const char *name;
+ struct device *hwmon_dev;
+ struct mutex lock;
+
+ struct mutex update_lock;
+ bool valid; /* true if following fields are valid */
+ unsigned long last_updated; /* In jiffies */
+ char maxins; /* == 3 if temp enabled, otherwise == 4 */
+ u8 revision; /* Reg. value */
+
+ u8 in[5]; /* Register value */
+ u8 in_max[5]; /* Register value */
+ u8 in_min[5]; /* Register value */
+ u8 fan[2]; /* Register value */
+ u8 fan_min[2]; /* Register value */
+ s8 temp; /* Register value */
+ s8 temp_over; /* Register value */
+ s8 temp_hyst; /* Register value */
+ u8 fan_div[2]; /* Register encoding, shifted right */
+ u16 alarms; /* Register encoding, combined */
+};
+
+static struct pci_dev *s_bridge; /* pointer to the (only) sis5595 */
+
+/* ISA access must be locked explicitly. */
+static int sis5595_read_value(struct sis5595_data *data, u8 reg)
+{
+ int res;
+
+ mutex_lock(&data->lock);
+ outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
+ res = inb_p(data->addr + SIS5595_DATA_REG_OFFSET);
+ mutex_unlock(&data->lock);
+ return res;
+}
+
+static void sis5595_write_value(struct sis5595_data *data, u8 reg, u8 value)
+{
+ mutex_lock(&data->lock);
+ outb_p(reg, data->addr + SIS5595_ADDR_REG_OFFSET);
+ outb_p(value, data->addr + SIS5595_DATA_REG_OFFSET);
+ mutex_unlock(&data->lock);
+}
+
+static struct sis5595_data *sis5595_update_device(struct device *dev)
+{
+ struct sis5595_data *data = dev_get_drvdata(dev);
+ int i;
+
+ mutex_lock(&data->update_lock);
+
+ if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
+ || !data->valid) {
+
+ for (i = 0; i <= data->maxins; i++) {
+ data->in[i] =
+ sis5595_read_value(data, SIS5595_REG_IN(i));
+ data->in_min[i] =
+ sis5595_read_value(data,
+ SIS5595_REG_IN_MIN(i));
+ data->in_max[i] =
+ sis5595_read_value(data,
+ SIS5595_REG_IN_MAX(i));
+ }
+ for (i = 0; i < 2; i++) {
+ data->fan[i] =
+ sis5595_read_value(data, SIS5595_REG_FAN(i));
+ data->fan_min[i] =
+ sis5595_read_value(data,
+ SIS5595_REG_FAN_MIN(i));
+ }
+ if (data->maxins == 3) {
+ data->temp =
+ sis5595_read_value(data, SIS5595_REG_TEMP);
+ data->temp_over =
+ sis5595_read_value(data, SIS5595_REG_TEMP_OVER);
+ data->temp_hyst =
+ sis5595_read_value(data, SIS5595_REG_TEMP_HYST);
+ }
+ i = sis5595_read_value(data, SIS5595_REG_FANDIV);
+ data->fan_div[0] = (i >> 4) & 0x03;
+ data->fan_div[1] = i >> 6;
+ data->alarms =
+ sis5595_read_value(data, SIS5595_REG_ALARM1) |
+ (sis5595_read_value(data, SIS5595_REG_ALARM2) << 8);
+ data->last_updated = jiffies;
+ data->valid = true;
+ }
+
+ mutex_unlock(&data->update_lock);
+
+ return data;
+}
+
+/* 4 Voltages */
+static ssize_t in_show(struct device *dev, struct device_attribute *da,
+ char *buf)
+{
+ struct sis5595_data *data = sis5595_update_device(dev);
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ int nr = attr->index;
+ return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr]));
+}
+
+static ssize_t in_min_show(struct device *dev, struct device_attribute *da,
+ char *buf)
+{
+ struct sis5595_data *data = sis5595_update_device(dev);
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ int nr = attr->index;
+ return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr]));
+}
+
+static ssize_t in_max_show(struct device *dev, struct device_attribute *da,
+ char *buf)
+{
+ struct sis5595_data *data = sis5595_update_device(dev);
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ int nr = attr->index;
+ return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr]));
+}
+
+static ssize_t in_min_store(struct device *dev, struct device_attribute *da,
+ const char *buf, size_t count)
+{
+ struct sis5595_data *data = dev_get_drvdata(dev);
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ int nr = attr->index;
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ data->in_min[nr] = IN_TO_REG(val);
+ sis5595_write_value(data, SIS5595_REG_IN_MIN(nr), data->in_min[nr]);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static ssize_t in_max_store(struct device *dev, struct device_attribute *da,
+ const char *buf, size_t count)
+{
+ struct sis5595_data *data = dev_get_drvdata(dev);
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ int nr = attr->index;
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ data->in_max[nr] = IN_TO_REG(val);
+ sis5595_write_value(data, SIS5595_REG_IN_MAX(nr), data->in_max[nr]);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0);
+static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0);
+static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0);
+static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1);
+static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1);
+static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1);
+static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2);
+static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2);
+static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2);
+static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3);
+static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3);
+static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3);
+static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4);
+static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4);
+static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4);
+
+/* Temperature */
+static ssize_t temp1_input_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct sis5595_data *data = sis5595_update_device(dev);
+ return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp));
+}
+
+static ssize_t temp1_max_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct sis5595_data *data = sis5595_update_device(dev);
+ return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_over));
+}
+
+static ssize_t temp1_max_store(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t count)
+{
+ struct sis5595_data *data = dev_get_drvdata(dev);
+ long val;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ data->temp_over = TEMP_TO_REG(val);
+ sis5595_write_value(data, SIS5595_REG_TEMP_OVER, data->temp_over);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static ssize_t temp1_max_hyst_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct sis5595_data *data = sis5595_update_device(dev);
+ return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_hyst));
+}
+
+static ssize_t temp1_max_hyst_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct sis5595_data *data = dev_get_drvdata(dev);
+ long val;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ data->temp_hyst = TEMP_TO_REG(val);
+ sis5595_write_value(data, SIS5595_REG_TEMP_HYST, data->temp_hyst);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static DEVICE_ATTR_RO(temp1_input);
+static DEVICE_ATTR_RW(temp1_max);
+static DEVICE_ATTR_RW(temp1_max_hyst);
+
+/* 2 Fans */
+static ssize_t fan_show(struct device *dev, struct device_attribute *da,
+ char *buf)
+{
+ struct sis5595_data *data = sis5595_update_device(dev);
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ int nr = attr->index;
+ return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr],
+ DIV_FROM_REG(data->fan_div[nr])));
+}
+
+static ssize_t fan_min_show(struct device *dev, struct device_attribute *da,
+ char *buf)
+{
+ struct sis5595_data *data = sis5595_update_device(dev);
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ int nr = attr->index;
+ return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[nr],
+ DIV_FROM_REG(data->fan_div[nr])));
+}
+
+static ssize_t fan_min_store(struct device *dev, struct device_attribute *da,
+ const char *buf, size_t count)
+{
+ struct sis5595_data *data = dev_get_drvdata(dev);
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ int nr = attr->index;
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
+ sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static ssize_t fan_div_show(struct device *dev, struct device_attribute *da,
+ char *buf)
+{
+ struct sis5595_data *data = sis5595_update_device(dev);
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ int nr = attr->index;
+ return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
+}
+
+/*
+ * 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 fan_div_store(struct device *dev, struct device_attribute *da,
+ const char *buf, size_t count)
+{
+ struct sis5595_data *data = dev_get_drvdata(dev);
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ int nr = attr->index;
+ unsigned long min;
+ int reg;
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
+ min = FAN_FROM_REG(data->fan_min[nr],
+ DIV_FROM_REG(data->fan_div[nr]));
+ reg = sis5595_read_value(data, SIS5595_REG_FANDIV);
+
+ switch (val) {
+ case 1:
+ data->fan_div[nr] = 0;
+ break;
+ case 2:
+ data->fan_div[nr] = 1;
+ break;
+ case 4:
+ data->fan_div[nr] = 2;
+ break;
+ case 8:
+ data->fan_div[nr] = 3;
+ break;
+ default:
+ dev_err(dev,
+ "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
+ val);
+ mutex_unlock(&data->update_lock);
+ return -EINVAL;
+ }
+
+ switch (nr) {
+ case 0:
+ reg = (reg & 0xcf) | (data->fan_div[nr] << 4);
+ break;
+ case 1:
+ reg = (reg & 0x3f) | (data->fan_div[nr] << 6);
+ break;
+ }
+ sis5595_write_value(data, SIS5595_REG_FANDIV, reg);
+ data->fan_min[nr] =
+ FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
+ sis5595_write_value(data, SIS5595_REG_FAN_MIN(nr), data->fan_min[nr]);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
+static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
+static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
+static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
+static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
+static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
+
+/* Alarms */
+static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct sis5595_data *data = sis5595_update_device(dev);
+ return sprintf(buf, "%d\n", data->alarms);
+}
+static DEVICE_ATTR_RO(alarms);
+
+static ssize_t alarm_show(struct device *dev, struct device_attribute *da,
+ char *buf)
+{
+ struct sis5595_data *data = sis5595_update_device(dev);
+ int nr = to_sensor_dev_attr(da)->index;
+ return sprintf(buf, "%u\n", (data->alarms >> nr) & 1);
+}
+static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);
+static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);
+static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);
+static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
+static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 15);
+static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 6);
+static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 7);
+static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 15);
+
+static ssize_t name_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct sis5595_data *data = dev_get_drvdata(dev);
+ return sprintf(buf, "%s\n", data->name);
+}
+static DEVICE_ATTR_RO(name);
+
+static struct attribute *sis5595_attributes[] = {
+ &sensor_dev_attr_in0_input.dev_attr.attr,
+ &sensor_dev_attr_in0_min.dev_attr.attr,
+ &sensor_dev_attr_in0_max.dev_attr.attr,
+ &sensor_dev_attr_in0_alarm.dev_attr.attr,
+ &sensor_dev_attr_in1_input.dev_attr.attr,
+ &sensor_dev_attr_in1_min.dev_attr.attr,
+ &sensor_dev_attr_in1_max.dev_attr.attr,
+ &sensor_dev_attr_in1_alarm.dev_attr.attr,
+ &sensor_dev_attr_in2_input.dev_attr.attr,
+ &sensor_dev_attr_in2_min.dev_attr.attr,
+ &sensor_dev_attr_in2_max.dev_attr.attr,
+ &sensor_dev_attr_in2_alarm.dev_attr.attr,
+ &sensor_dev_attr_in3_input.dev_attr.attr,
+ &sensor_dev_attr_in3_min.dev_attr.attr,
+ &sensor_dev_attr_in3_max.dev_attr.attr,
+ &sensor_dev_attr_in3_alarm.dev_attr.attr,
+
+ &sensor_dev_attr_fan1_input.dev_attr.attr,
+ &sensor_dev_attr_fan1_min.dev_attr.attr,
+ &sensor_dev_attr_fan1_div.dev_attr.attr,
+ &sensor_dev_attr_fan1_alarm.dev_attr.attr,
+ &sensor_dev_attr_fan2_input.dev_attr.attr,
+ &sensor_dev_attr_fan2_min.dev_attr.attr,
+ &sensor_dev_attr_fan2_div.dev_attr.attr,
+ &sensor_dev_attr_fan2_alarm.dev_attr.attr,
+
+ &dev_attr_alarms.attr,
+ &dev_attr_name.attr,
+ NULL
+};
+
+static const struct attribute_group sis5595_group = {
+ .attrs = sis5595_attributes,
+};
+
+static struct attribute *sis5595_attributes_in4[] = {
+ &sensor_dev_attr_in4_input.dev_attr.attr,
+ &sensor_dev_attr_in4_min.dev_attr.attr,
+ &sensor_dev_attr_in4_max.dev_attr.attr,
+ &sensor_dev_attr_in4_alarm.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group sis5595_group_in4 = {
+ .attrs = sis5595_attributes_in4,
+};
+
+static struct attribute *sis5595_attributes_temp1[] = {
+ &dev_attr_temp1_input.attr,
+ &dev_attr_temp1_max.attr,
+ &dev_attr_temp1_max_hyst.attr,
+ &sensor_dev_attr_temp1_alarm.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group sis5595_group_temp1 = {
+ .attrs = sis5595_attributes_temp1,
+};
+
+/* Called when we have found a new SIS5595. */
+static void sis5595_init_device(struct sis5595_data *data)
+{
+ u8 config = sis5595_read_value(data, SIS5595_REG_CONFIG);
+ if (!(config & 0x01))
+ sis5595_write_value(data, SIS5595_REG_CONFIG,
+ (config & 0xf7) | 0x01);
+}
+
+/* This is called when the module is loaded */
+static int sis5595_probe(struct platform_device *pdev)
+{
+ int err = 0;
+ int i;
+ struct sis5595_data *data;
+ struct resource *res;
+ char val;
+
+ /* Reserve the ISA region */
+ res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+ if (!devm_request_region(&pdev->dev, res->start, SIS5595_EXTENT,
+ DRIVER_NAME))
+ return -EBUSY;
+
+ data = devm_kzalloc(&pdev->dev, sizeof(struct sis5595_data),
+ GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ mutex_init(&data->lock);
+ mutex_init(&data->update_lock);
+ data->addr = res->start;
+ data->name = DRIVER_NAME;
+ platform_set_drvdata(pdev, data);
+
+ /*
+ * Check revision and pin registers to determine whether 4 or 5 voltages
+ */
+ data->revision = s_bridge->revision;
+ /* 4 voltages, 1 temp */
+ data->maxins = 3;
+ if (data->revision >= REV2MIN) {
+ pci_read_config_byte(s_bridge, SIS5595_PIN_REG, &val);
+ if (!(val & 0x80))
+ /* 5 voltages, no temps */
+ data->maxins = 4;
+ }
+
+ /* Initialize the SIS5595 chip */
+ sis5595_init_device(data);
+
+ /* A few vars need to be filled upon startup */
+ for (i = 0; i < 2; i++) {
+ data->fan_min[i] = sis5595_read_value(data,
+ SIS5595_REG_FAN_MIN(i));
+ }
+
+ /* Register sysfs hooks */
+ err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group);
+ if (err)
+ return err;
+ if (data->maxins == 4) {
+ err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_in4);
+ if (err)
+ goto exit_remove_files;
+ } else {
+ err = sysfs_create_group(&pdev->dev.kobj, &sis5595_group_temp1);
+ if (err)
+ goto exit_remove_files;
+ }
+
+ data->hwmon_dev = hwmon_device_register(&pdev->dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ err = PTR_ERR(data->hwmon_dev);
+ goto exit_remove_files;
+ }
+
+ return 0;
+
+exit_remove_files:
+ sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
+ sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
+ sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
+ return err;
+}
+
+static int sis5595_remove(struct platform_device *pdev)
+{
+ struct sis5595_data *data = platform_get_drvdata(pdev);
+
+ hwmon_device_unregister(data->hwmon_dev);
+ sysfs_remove_group(&pdev->dev.kobj, &sis5595_group);
+ sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_in4);
+ sysfs_remove_group(&pdev->dev.kobj, &sis5595_group_temp1);
+
+ return 0;
+}
+
+static const struct pci_device_id sis5595_pci_ids[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503) },
+ { 0, }
+};
+
+MODULE_DEVICE_TABLE(pci, sis5595_pci_ids);
+
+static int blacklist[] = {
+ PCI_DEVICE_ID_SI_540,
+ PCI_DEVICE_ID_SI_550,
+ PCI_DEVICE_ID_SI_630,
+ PCI_DEVICE_ID_SI_645,
+ PCI_DEVICE_ID_SI_730,
+ PCI_DEVICE_ID_SI_735,
+ PCI_DEVICE_ID_SI_5511, /*
+ * 5513 chip has the 0008 device but
+ * that ID shows up in other chips so we
+ * use the 5511 ID for recognition
+ */
+ PCI_DEVICE_ID_SI_5597,
+ PCI_DEVICE_ID_SI_5598,
+ 0 };
+
+static int sis5595_device_add(unsigned short address)
+{
+ struct resource res = {
+ .start = address,
+ .end = address + SIS5595_EXTENT - 1,
+ .name = DRIVER_NAME,
+ .flags = IORESOURCE_IO,
+ };
+ int err;
+
+ err = acpi_check_resource_conflict(&res);
+ if (err)
+ goto exit;
+
+ pdev = platform_device_alloc(DRIVER_NAME, address);
+ if (!pdev) {
+ err = -ENOMEM;
+ pr_err("Device allocation failed\n");
+ goto exit;
+ }
+
+ err = platform_device_add_resources(pdev, &res, 1);
+ if (err) {
+ pr_err("Device resource addition failed (%d)\n", err);
+ goto exit_device_put;
+ }
+
+ err = platform_device_add(pdev);
+ if (err) {
+ pr_err("Device addition failed (%d)\n", err);
+ goto exit_device_put;
+ }
+
+ return 0;
+
+exit_device_put:
+ platform_device_put(pdev);
+exit:
+ return err;
+}
+
+static struct platform_driver sis5595_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ },
+ .probe = sis5595_probe,
+ .remove = sis5595_remove,
+};
+
+static int sis5595_pci_probe(struct pci_dev *dev,
+ const struct pci_device_id *id)
+{
+ u16 address;
+ u8 enable;
+ int *i, err;
+
+ for (i = blacklist; *i != 0; i++) {
+ struct pci_dev *d;
+ d = pci_get_device(PCI_VENDOR_ID_SI, *i, NULL);
+ if (d) {
+ dev_err(&d->dev,
+ "Looked for SIS5595 but found unsupported device %.4x\n",
+ *i);
+ pci_dev_put(d);
+ return -ENODEV;
+ }
+ }
+
+ force_addr &= ~(SIS5595_EXTENT - 1);
+ if (force_addr) {
+ dev_warn(&dev->dev, "Forcing ISA address 0x%x\n", force_addr);
+ pci_write_config_word(dev, SIS5595_BASE_REG, force_addr);
+ }
+
+ err = pci_read_config_word(dev, SIS5595_BASE_REG, &address);
+ if (err != PCIBIOS_SUCCESSFUL) {
+ dev_err(&dev->dev, "Failed to read ISA address\n");
+ return -ENODEV;
+ }
+
+ address &= ~(SIS5595_EXTENT - 1);
+ if (!address) {
+ dev_err(&dev->dev,
+ "Base address not set - upgrade BIOS or use force_addr=0xaddr\n");
+ return -ENODEV;
+ }
+ if (force_addr && address != force_addr) {
+ /* doesn't work for some chips? */
+ dev_err(&dev->dev, "Failed to force ISA address\n");
+ return -ENODEV;
+ }
+
+ err = pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable);
+ if (err != PCIBIOS_SUCCESSFUL) {
+ dev_err(&dev->dev, "Failed to read enable register\n");
+ return -ENODEV;
+ }
+ if (!(enable & 0x80)) {
+ err = pci_write_config_byte(dev, SIS5595_ENABLE_REG, enable | 0x80);
+ if (err != PCIBIOS_SUCCESSFUL)
+ goto enable_fail;
+
+ err = pci_read_config_byte(dev, SIS5595_ENABLE_REG, &enable);
+ if (err != PCIBIOS_SUCCESSFUL)
+ goto enable_fail;
+
+ /* doesn't work for some chips! */
+ if (!(enable & 0x80))
+ goto enable_fail;
+ }
+
+ if (platform_driver_register(&sis5595_driver)) {
+ dev_dbg(&dev->dev, "Failed to register sis5595 driver\n");
+ goto exit;
+ }
+
+ s_bridge = pci_dev_get(dev);
+ /* Sets global pdev as a side effect */
+ if (sis5595_device_add(address))
+ goto exit_unregister;
+
+ /*
+ * Always return failure here. This is to allow other drivers to bind
+ * to this pci device. We don't really want to have control over the
+ * pci device, we only wanted to read as few register values from it.
+ */
+ return -ENODEV;
+
+enable_fail:
+ dev_err(&dev->dev, "Failed to enable HWM device\n");
+ goto exit;
+
+exit_unregister:
+ pci_dev_put(dev);
+ platform_driver_unregister(&sis5595_driver);
+exit:
+ return -ENODEV;
+}
+
+static struct pci_driver sis5595_pci_driver = {
+ .name = DRIVER_NAME,
+ .id_table = sis5595_pci_ids,
+ .probe = sis5595_pci_probe,
+};
+
+static int __init sm_sis5595_init(void)
+{
+ return pci_register_driver(&sis5595_pci_driver);
+}
+
+static void __exit sm_sis5595_exit(void)
+{
+ pci_unregister_driver(&sis5595_pci_driver);
+ if (s_bridge != NULL) {
+ platform_device_unregister(pdev);
+ platform_driver_unregister(&sis5595_driver);
+ pci_dev_put(s_bridge);
+ s_bridge = NULL;
+ }
+}
+
+MODULE_AUTHOR("Aurelien Jarno <aurelien@aurel32.net>");
+MODULE_DESCRIPTION("SiS 5595 Sensor device");
+MODULE_LICENSE("GPL");
+
+module_init(sm_sis5595_init);
+module_exit(sm_sis5595_exit);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-12 03:26:34 +0000