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-rw-r--r--drivers/hwmon/pc87427.c1331
1 files changed, 1331 insertions, 0 deletions
diff --git a/drivers/hwmon/pc87427.c b/drivers/hwmon/pc87427.c
new file mode 100644
index 000000000..eaab83d87
--- /dev/null
+++ b/drivers/hwmon/pc87427.c
@@ -0,0 +1,1331 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * pc87427.c - hardware monitoring driver for the
+ * National Semiconductor PC87427 Super-I/O chip
+ * Copyright (C) 2006, 2008, 2010 Jean Delvare <jdelvare@suse.de>
+ *
+ * Supports the following chips:
+ *
+ * Chip #vin #fan #pwm #temp devid
+ * PC87427 - 8 4 6 0xF2
+ *
+ * This driver assumes that no more than one chip is present.
+ * Only fans are fully supported so far. Temperatures are in read-only
+ * mode, and voltages aren't supported at all.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/platform_device.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/sysfs.h>
+#include <linux/ioport.h>
+#include <linux/acpi.h>
+#include <linux/io.h>
+
+static unsigned short force_id;
+module_param(force_id, ushort, 0);
+MODULE_PARM_DESC(force_id, "Override the detected device ID");
+
+static struct platform_device *pdev;
+
+#define DRVNAME "pc87427"
+
+/*
+ * The lock mutex protects both the I/O accesses (needed because the
+ * device is using banked registers) and the register cache (needed to keep
+ * the data in the registers and the cache in sync at any time).
+ */
+struct pc87427_data {
+ struct device *hwmon_dev;
+ struct mutex lock;
+ int address[2];
+ const char *name;
+
+ unsigned long last_updated; /* in jiffies */
+ u8 fan_enabled; /* bit vector */
+ u16 fan[8]; /* register values */
+ u16 fan_min[8]; /* register values */
+ u8 fan_status[8]; /* register values */
+
+ u8 pwm_enabled; /* bit vector */
+ u8 pwm_auto_ok; /* bit vector */
+ u8 pwm_enable[4]; /* register values */
+ u8 pwm[4]; /* register values */
+
+ u8 temp_enabled; /* bit vector */
+ s16 temp[6]; /* register values */
+ s8 temp_min[6]; /* register values */
+ s8 temp_max[6]; /* register values */
+ s8 temp_crit[6]; /* register values */
+ u8 temp_status[6]; /* register values */
+ u8 temp_type[6]; /* register values */
+};
+
+struct pc87427_sio_data {
+ unsigned short address[2];
+ u8 has_fanin;
+ u8 has_fanout;
+};
+
+/*
+ * Super-I/O registers and operations
+ */
+
+#define SIOREG_LDSEL 0x07 /* Logical device select */
+#define SIOREG_DEVID 0x20 /* Device ID */
+#define SIOREG_CF2 0x22 /* Configuration 2 */
+#define SIOREG_CF3 0x23 /* Configuration 3 */
+#define SIOREG_CF4 0x24 /* Configuration 4 */
+#define SIOREG_CF5 0x25 /* Configuration 5 */
+#define SIOREG_CFB 0x2B /* Configuration B */
+#define SIOREG_CFC 0x2C /* Configuration C */
+#define SIOREG_CFD 0x2D /* Configuration D */
+#define SIOREG_ACT 0x30 /* Device activation */
+#define SIOREG_MAP 0x50 /* I/O or memory mapping */
+#define SIOREG_IOBASE 0x60 /* I/O base address */
+
+static const u8 logdev[2] = { 0x09, 0x14 };
+static const char *logdev_str[2] = { DRVNAME " FMC", DRVNAME " HMC" };
+#define LD_FAN 0
+#define LD_IN 1
+#define LD_TEMP 1
+
+static inline int superio_enter(int sioaddr)
+{
+ if (!request_muxed_region(sioaddr, 2, DRVNAME))
+ return -EBUSY;
+ return 0;
+}
+
+static inline void superio_outb(int sioaddr, int reg, int val)
+{
+ outb(reg, sioaddr);
+ outb(val, sioaddr + 1);
+}
+
+static inline int superio_inb(int sioaddr, int reg)
+{
+ outb(reg, sioaddr);
+ return inb(sioaddr + 1);
+}
+
+static inline void superio_exit(int sioaddr)
+{
+ outb(0x02, sioaddr);
+ outb(0x02, sioaddr + 1);
+ release_region(sioaddr, 2);
+}
+
+/*
+ * Logical devices
+ */
+
+#define REGION_LENGTH 32
+#define PC87427_REG_BANK 0x0f
+#define BANK_FM(nr) (nr)
+#define BANK_FT(nr) (0x08 + (nr))
+#define BANK_FC(nr) (0x10 + (nr) * 2)
+#define BANK_TM(nr) (nr)
+#define BANK_VM(nr) (0x08 + (nr))
+
+/*
+ * I/O access functions
+ */
+
+/* ldi is the logical device index */
+static inline int pc87427_read8(struct pc87427_data *data, u8 ldi, u8 reg)
+{
+ return inb(data->address[ldi] + reg);
+}
+
+/* Must be called with data->lock held, except during init */
+static inline int pc87427_read8_bank(struct pc87427_data *data, u8 ldi,
+ u8 bank, u8 reg)
+{
+ outb(bank, data->address[ldi] + PC87427_REG_BANK);
+ return inb(data->address[ldi] + reg);
+}
+
+/* Must be called with data->lock held, except during init */
+static inline void pc87427_write8_bank(struct pc87427_data *data, u8 ldi,
+ u8 bank, u8 reg, u8 value)
+{
+ outb(bank, data->address[ldi] + PC87427_REG_BANK);
+ outb(value, data->address[ldi] + reg);
+}
+
+/*
+ * Fan registers and conversions
+ */
+
+/* fan data registers are 16-bit wide */
+#define PC87427_REG_FAN 0x12
+#define PC87427_REG_FAN_MIN 0x14
+#define PC87427_REG_FAN_STATUS 0x10
+
+#define FAN_STATUS_STALL (1 << 3)
+#define FAN_STATUS_LOSPD (1 << 1)
+#define FAN_STATUS_MONEN (1 << 0)
+
+/*
+ * Dedicated function to read all registers related to a given fan input.
+ * This saves us quite a few locks and bank selections.
+ * Must be called with data->lock held.
+ * nr is from 0 to 7
+ */
+static void pc87427_readall_fan(struct pc87427_data *data, u8 nr)
+{
+ int iobase = data->address[LD_FAN];
+
+ outb(BANK_FM(nr), iobase + PC87427_REG_BANK);
+ data->fan[nr] = inw(iobase + PC87427_REG_FAN);
+ data->fan_min[nr] = inw(iobase + PC87427_REG_FAN_MIN);
+ data->fan_status[nr] = inb(iobase + PC87427_REG_FAN_STATUS);
+ /* Clear fan alarm bits */
+ outb(data->fan_status[nr], iobase + PC87427_REG_FAN_STATUS);
+}
+
+/*
+ * The 2 LSB of fan speed registers are used for something different.
+ * The actual 2 LSB of the measurements are not available.
+ */
+static inline unsigned long fan_from_reg(u16 reg)
+{
+ reg &= 0xfffc;
+ if (reg == 0x0000 || reg == 0xfffc)
+ return 0;
+ return 5400000UL / reg;
+}
+
+/* The 2 LSB of the fan speed limit registers are not significant. */
+static inline u16 fan_to_reg(unsigned long val)
+{
+ if (val < 83UL)
+ return 0xffff;
+ if (val >= 1350000UL)
+ return 0x0004;
+ return ((1350000UL + val / 2) / val) << 2;
+}
+
+/*
+ * PWM registers and conversions
+ */
+
+#define PC87427_REG_PWM_ENABLE 0x10
+#define PC87427_REG_PWM_DUTY 0x12
+
+#define PWM_ENABLE_MODE_MASK (7 << 4)
+#define PWM_ENABLE_CTLEN (1 << 0)
+
+#define PWM_MODE_MANUAL (0 << 4)
+#define PWM_MODE_AUTO (1 << 4)
+#define PWM_MODE_OFF (2 << 4)
+#define PWM_MODE_ON (7 << 4)
+
+/*
+ * Dedicated function to read all registers related to a given PWM output.
+ * This saves us quite a few locks and bank selections.
+ * Must be called with data->lock held.
+ * nr is from 0 to 3
+ */
+static void pc87427_readall_pwm(struct pc87427_data *data, u8 nr)
+{
+ int iobase = data->address[LD_FAN];
+
+ outb(BANK_FC(nr), iobase + PC87427_REG_BANK);
+ data->pwm_enable[nr] = inb(iobase + PC87427_REG_PWM_ENABLE);
+ data->pwm[nr] = inb(iobase + PC87427_REG_PWM_DUTY);
+}
+
+static inline int pwm_enable_from_reg(u8 reg)
+{
+ switch (reg & PWM_ENABLE_MODE_MASK) {
+ case PWM_MODE_ON:
+ return 0;
+ case PWM_MODE_MANUAL:
+ case PWM_MODE_OFF:
+ return 1;
+ case PWM_MODE_AUTO:
+ return 2;
+ default:
+ return -EPROTO;
+ }
+}
+
+static inline u8 pwm_enable_to_reg(unsigned long val, u8 pwmval)
+{
+ switch (val) {
+ default:
+ return PWM_MODE_ON;
+ case 1:
+ return pwmval ? PWM_MODE_MANUAL : PWM_MODE_OFF;
+ case 2:
+ return PWM_MODE_AUTO;
+ }
+}
+
+/*
+ * Temperature registers and conversions
+ */
+
+#define PC87427_REG_TEMP_STATUS 0x10
+#define PC87427_REG_TEMP 0x14
+#define PC87427_REG_TEMP_MAX 0x18
+#define PC87427_REG_TEMP_MIN 0x19
+#define PC87427_REG_TEMP_CRIT 0x1a
+#define PC87427_REG_TEMP_TYPE 0x1d
+
+#define TEMP_STATUS_CHANEN (1 << 0)
+#define TEMP_STATUS_LOWFLG (1 << 1)
+#define TEMP_STATUS_HIGHFLG (1 << 2)
+#define TEMP_STATUS_CRITFLG (1 << 3)
+#define TEMP_STATUS_SENSERR (1 << 5)
+#define TEMP_TYPE_MASK (3 << 5)
+
+#define TEMP_TYPE_THERMISTOR (1 << 5)
+#define TEMP_TYPE_REMOTE_DIODE (2 << 5)
+#define TEMP_TYPE_LOCAL_DIODE (3 << 5)
+
+/*
+ * Dedicated function to read all registers related to a given temperature
+ * input. This saves us quite a few locks and bank selections.
+ * Must be called with data->lock held.
+ * nr is from 0 to 5
+ */
+static void pc87427_readall_temp(struct pc87427_data *data, u8 nr)
+{
+ int iobase = data->address[LD_TEMP];
+
+ outb(BANK_TM(nr), iobase + PC87427_REG_BANK);
+ data->temp[nr] = le16_to_cpu(inw(iobase + PC87427_REG_TEMP));
+ data->temp_max[nr] = inb(iobase + PC87427_REG_TEMP_MAX);
+ data->temp_min[nr] = inb(iobase + PC87427_REG_TEMP_MIN);
+ data->temp_crit[nr] = inb(iobase + PC87427_REG_TEMP_CRIT);
+ data->temp_type[nr] = inb(iobase + PC87427_REG_TEMP_TYPE);
+ data->temp_status[nr] = inb(iobase + PC87427_REG_TEMP_STATUS);
+ /* Clear fan alarm bits */
+ outb(data->temp_status[nr], iobase + PC87427_REG_TEMP_STATUS);
+}
+
+static inline unsigned int temp_type_from_reg(u8 reg)
+{
+ switch (reg & TEMP_TYPE_MASK) {
+ case TEMP_TYPE_THERMISTOR:
+ return 4;
+ case TEMP_TYPE_REMOTE_DIODE:
+ case TEMP_TYPE_LOCAL_DIODE:
+ return 3;
+ default:
+ return 0;
+ }
+}
+
+/*
+ * We assume 8-bit thermal sensors; 9-bit thermal sensors are possible
+ * too, but I have no idea how to figure out when they are used.
+ */
+static inline long temp_from_reg(s16 reg)
+{
+ return reg * 1000 / 256;
+}
+
+static inline long temp_from_reg8(s8 reg)
+{
+ return reg * 1000;
+}
+
+/*
+ * Data interface
+ */
+
+static struct pc87427_data *pc87427_update_device(struct device *dev)
+{
+ struct pc87427_data *data = dev_get_drvdata(dev);
+ int i;
+
+ mutex_lock(&data->lock);
+ if (!time_after(jiffies, data->last_updated + HZ)
+ && data->last_updated)
+ goto done;
+
+ /* Fans */
+ for (i = 0; i < 8; i++) {
+ if (!(data->fan_enabled & (1 << i)))
+ continue;
+ pc87427_readall_fan(data, i);
+ }
+
+ /* PWM outputs */
+ for (i = 0; i < 4; i++) {
+ if (!(data->pwm_enabled & (1 << i)))
+ continue;
+ pc87427_readall_pwm(data, i);
+ }
+
+ /* Temperature channels */
+ for (i = 0; i < 6; i++) {
+ if (!(data->temp_enabled & (1 << i)))
+ continue;
+ pc87427_readall_temp(data, i);
+ }
+
+ data->last_updated = jiffies;
+
+done:
+ mutex_unlock(&data->lock);
+ return data;
+}
+
+static ssize_t fan_input_show(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct pc87427_data *data = pc87427_update_device(dev);
+ int nr = to_sensor_dev_attr(devattr)->index;
+
+ return sprintf(buf, "%lu\n", fan_from_reg(data->fan[nr]));
+}
+
+static ssize_t fan_min_show(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct pc87427_data *data = pc87427_update_device(dev);
+ int nr = to_sensor_dev_attr(devattr)->index;
+
+ return sprintf(buf, "%lu\n", fan_from_reg(data->fan_min[nr]));
+}
+
+static ssize_t fan_alarm_show(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct pc87427_data *data = pc87427_update_device(dev);
+ int nr = to_sensor_dev_attr(devattr)->index;
+
+ return sprintf(buf, "%d\n", !!(data->fan_status[nr]
+ & FAN_STATUS_LOSPD));
+}
+
+static ssize_t fan_fault_show(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct pc87427_data *data = pc87427_update_device(dev);
+ int nr = to_sensor_dev_attr(devattr)->index;
+
+ return sprintf(buf, "%d\n", !!(data->fan_status[nr]
+ & FAN_STATUS_STALL));
+}
+
+static ssize_t fan_min_store(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct pc87427_data *data = dev_get_drvdata(dev);
+ int nr = to_sensor_dev_attr(devattr)->index;
+ unsigned long val;
+ int iobase = data->address[LD_FAN];
+
+ if (kstrtoul(buf, 10, &val) < 0)
+ return -EINVAL;
+
+ mutex_lock(&data->lock);
+ outb(BANK_FM(nr), iobase + PC87427_REG_BANK);
+ /*
+ * The low speed limit registers are read-only while monitoring
+ * is enabled, so we have to disable monitoring, then change the
+ * limit, and finally enable monitoring again.
+ */
+ outb(0, iobase + PC87427_REG_FAN_STATUS);
+ data->fan_min[nr] = fan_to_reg(val);
+ outw(data->fan_min[nr], iobase + PC87427_REG_FAN_MIN);
+ outb(FAN_STATUS_MONEN, iobase + PC87427_REG_FAN_STATUS);
+ mutex_unlock(&data->lock);
+
+ return count;
+}
+
+static SENSOR_DEVICE_ATTR_RO(fan1_input, fan_input, 0);
+static SENSOR_DEVICE_ATTR_RO(fan2_input, fan_input, 1);
+static SENSOR_DEVICE_ATTR_RO(fan3_input, fan_input, 2);
+static SENSOR_DEVICE_ATTR_RO(fan4_input, fan_input, 3);
+static SENSOR_DEVICE_ATTR_RO(fan5_input, fan_input, 4);
+static SENSOR_DEVICE_ATTR_RO(fan6_input, fan_input, 5);
+static SENSOR_DEVICE_ATTR_RO(fan7_input, fan_input, 6);
+static SENSOR_DEVICE_ATTR_RO(fan8_input, fan_input, 7);
+
+static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
+static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
+static SENSOR_DEVICE_ATTR_RW(fan3_min, fan_min, 2);
+static SENSOR_DEVICE_ATTR_RW(fan4_min, fan_min, 3);
+static SENSOR_DEVICE_ATTR_RW(fan5_min, fan_min, 4);
+static SENSOR_DEVICE_ATTR_RW(fan6_min, fan_min, 5);
+static SENSOR_DEVICE_ATTR_RW(fan7_min, fan_min, 6);
+static SENSOR_DEVICE_ATTR_RW(fan8_min, fan_min, 7);
+
+static SENSOR_DEVICE_ATTR_RO(fan1_alarm, fan_alarm, 0);
+static SENSOR_DEVICE_ATTR_RO(fan2_alarm, fan_alarm, 1);
+static SENSOR_DEVICE_ATTR_RO(fan3_alarm, fan_alarm, 2);
+static SENSOR_DEVICE_ATTR_RO(fan4_alarm, fan_alarm, 3);
+static SENSOR_DEVICE_ATTR_RO(fan5_alarm, fan_alarm, 4);
+static SENSOR_DEVICE_ATTR_RO(fan6_alarm, fan_alarm, 5);
+static SENSOR_DEVICE_ATTR_RO(fan7_alarm, fan_alarm, 6);
+static SENSOR_DEVICE_ATTR_RO(fan8_alarm, fan_alarm, 7);
+
+static SENSOR_DEVICE_ATTR_RO(fan1_fault, fan_fault, 0);
+static SENSOR_DEVICE_ATTR_RO(fan2_fault, fan_fault, 1);
+static SENSOR_DEVICE_ATTR_RO(fan3_fault, fan_fault, 2);
+static SENSOR_DEVICE_ATTR_RO(fan4_fault, fan_fault, 3);
+static SENSOR_DEVICE_ATTR_RO(fan5_fault, fan_fault, 4);
+static SENSOR_DEVICE_ATTR_RO(fan6_fault, fan_fault, 5);
+static SENSOR_DEVICE_ATTR_RO(fan7_fault, fan_fault, 6);
+static SENSOR_DEVICE_ATTR_RO(fan8_fault, fan_fault, 7);
+
+static struct attribute *pc87427_attributes_fan[8][5] = {
+ {
+ &sensor_dev_attr_fan1_input.dev_attr.attr,
+ &sensor_dev_attr_fan1_min.dev_attr.attr,
+ &sensor_dev_attr_fan1_alarm.dev_attr.attr,
+ &sensor_dev_attr_fan1_fault.dev_attr.attr,
+ NULL
+ }, {
+ &sensor_dev_attr_fan2_input.dev_attr.attr,
+ &sensor_dev_attr_fan2_min.dev_attr.attr,
+ &sensor_dev_attr_fan2_alarm.dev_attr.attr,
+ &sensor_dev_attr_fan2_fault.dev_attr.attr,
+ NULL
+ }, {
+ &sensor_dev_attr_fan3_input.dev_attr.attr,
+ &sensor_dev_attr_fan3_min.dev_attr.attr,
+ &sensor_dev_attr_fan3_alarm.dev_attr.attr,
+ &sensor_dev_attr_fan3_fault.dev_attr.attr,
+ NULL
+ }, {
+ &sensor_dev_attr_fan4_input.dev_attr.attr,
+ &sensor_dev_attr_fan4_min.dev_attr.attr,
+ &sensor_dev_attr_fan4_alarm.dev_attr.attr,
+ &sensor_dev_attr_fan4_fault.dev_attr.attr,
+ NULL
+ }, {
+ &sensor_dev_attr_fan5_input.dev_attr.attr,
+ &sensor_dev_attr_fan5_min.dev_attr.attr,
+ &sensor_dev_attr_fan5_alarm.dev_attr.attr,
+ &sensor_dev_attr_fan5_fault.dev_attr.attr,
+ NULL
+ }, {
+ &sensor_dev_attr_fan6_input.dev_attr.attr,
+ &sensor_dev_attr_fan6_min.dev_attr.attr,
+ &sensor_dev_attr_fan6_alarm.dev_attr.attr,
+ &sensor_dev_attr_fan6_fault.dev_attr.attr,
+ NULL
+ }, {
+ &sensor_dev_attr_fan7_input.dev_attr.attr,
+ &sensor_dev_attr_fan7_min.dev_attr.attr,
+ &sensor_dev_attr_fan7_alarm.dev_attr.attr,
+ &sensor_dev_attr_fan7_fault.dev_attr.attr,
+ NULL
+ }, {
+ &sensor_dev_attr_fan8_input.dev_attr.attr,
+ &sensor_dev_attr_fan8_min.dev_attr.attr,
+ &sensor_dev_attr_fan8_alarm.dev_attr.attr,
+ &sensor_dev_attr_fan8_fault.dev_attr.attr,
+ NULL
+ }
+};
+
+static const struct attribute_group pc87427_group_fan[8] = {
+ { .attrs = pc87427_attributes_fan[0] },
+ { .attrs = pc87427_attributes_fan[1] },
+ { .attrs = pc87427_attributes_fan[2] },
+ { .attrs = pc87427_attributes_fan[3] },
+ { .attrs = pc87427_attributes_fan[4] },
+ { .attrs = pc87427_attributes_fan[5] },
+ { .attrs = pc87427_attributes_fan[6] },
+ { .attrs = pc87427_attributes_fan[7] },
+};
+
+/*
+ * Must be called with data->lock held and pc87427_readall_pwm() freshly
+ * called
+ */
+static void update_pwm_enable(struct pc87427_data *data, int nr, u8 mode)
+{
+ int iobase = data->address[LD_FAN];
+ data->pwm_enable[nr] &= ~PWM_ENABLE_MODE_MASK;
+ data->pwm_enable[nr] |= mode;
+ outb(data->pwm_enable[nr], iobase + PC87427_REG_PWM_ENABLE);
+}
+
+static ssize_t pwm_enable_show(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct pc87427_data *data = pc87427_update_device(dev);
+ int nr = to_sensor_dev_attr(devattr)->index;
+ int pwm_enable;
+
+ pwm_enable = pwm_enable_from_reg(data->pwm_enable[nr]);
+ if (pwm_enable < 0)
+ return pwm_enable;
+ return sprintf(buf, "%d\n", pwm_enable);
+}
+
+static ssize_t pwm_enable_store(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct pc87427_data *data = dev_get_drvdata(dev);
+ int nr = to_sensor_dev_attr(devattr)->index;
+ unsigned long val;
+
+ if (kstrtoul(buf, 10, &val) < 0 || val > 2)
+ return -EINVAL;
+ /* Can't go to automatic mode if it isn't configured */
+ if (val == 2 && !(data->pwm_auto_ok & (1 << nr)))
+ return -EINVAL;
+
+ mutex_lock(&data->lock);
+ pc87427_readall_pwm(data, nr);
+ update_pwm_enable(data, nr, pwm_enable_to_reg(val, data->pwm[nr]));
+ mutex_unlock(&data->lock);
+
+ return count;
+}
+
+static ssize_t pwm_show(struct device *dev, struct device_attribute *devattr,
+ char *buf)
+{
+ struct pc87427_data *data = pc87427_update_device(dev);
+ int nr = to_sensor_dev_attr(devattr)->index;
+
+ return sprintf(buf, "%d\n", (int)data->pwm[nr]);
+}
+
+static ssize_t pwm_store(struct device *dev, struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct pc87427_data *data = dev_get_drvdata(dev);
+ int nr = to_sensor_dev_attr(devattr)->index;
+ unsigned long val;
+ int iobase = data->address[LD_FAN];
+ u8 mode;
+
+ if (kstrtoul(buf, 10, &val) < 0 || val > 0xff)
+ return -EINVAL;
+
+ mutex_lock(&data->lock);
+ pc87427_readall_pwm(data, nr);
+ mode = data->pwm_enable[nr] & PWM_ENABLE_MODE_MASK;
+ if (mode != PWM_MODE_MANUAL && mode != PWM_MODE_OFF) {
+ dev_notice(dev,
+ "Can't set PWM%d duty cycle while not in manual mode\n",
+ nr + 1);
+ mutex_unlock(&data->lock);
+ return -EPERM;
+ }
+
+ /* We may have to change the mode */
+ if (mode == PWM_MODE_MANUAL && val == 0) {
+ /* Transition from Manual to Off */
+ update_pwm_enable(data, nr, PWM_MODE_OFF);
+ mode = PWM_MODE_OFF;
+ dev_dbg(dev, "Switching PWM%d from %s to %s\n", nr + 1,
+ "manual", "off");
+ } else if (mode == PWM_MODE_OFF && val != 0) {
+ /* Transition from Off to Manual */
+ update_pwm_enable(data, nr, PWM_MODE_MANUAL);
+ mode = PWM_MODE_MANUAL;
+ dev_dbg(dev, "Switching PWM%d from %s to %s\n", nr + 1,
+ "off", "manual");
+ }
+
+ data->pwm[nr] = val;
+ if (mode == PWM_MODE_MANUAL)
+ outb(val, iobase + PC87427_REG_PWM_DUTY);
+ mutex_unlock(&data->lock);
+
+ return count;
+}
+
+static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm_enable, 0);
+static SENSOR_DEVICE_ATTR_RW(pwm2_enable, pwm_enable, 1);
+static SENSOR_DEVICE_ATTR_RW(pwm3_enable, pwm_enable, 2);
+static SENSOR_DEVICE_ATTR_RW(pwm4_enable, pwm_enable, 3);
+
+static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0);
+static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1);
+static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, 2);
+static SENSOR_DEVICE_ATTR_RW(pwm4, pwm, 3);
+
+static struct attribute *pc87427_attributes_pwm[4][3] = {
+ {
+ &sensor_dev_attr_pwm1_enable.dev_attr.attr,
+ &sensor_dev_attr_pwm1.dev_attr.attr,
+ NULL
+ }, {
+ &sensor_dev_attr_pwm2_enable.dev_attr.attr,
+ &sensor_dev_attr_pwm2.dev_attr.attr,
+ NULL
+ }, {
+ &sensor_dev_attr_pwm3_enable.dev_attr.attr,
+ &sensor_dev_attr_pwm3.dev_attr.attr,
+ NULL
+ }, {
+ &sensor_dev_attr_pwm4_enable.dev_attr.attr,
+ &sensor_dev_attr_pwm4.dev_attr.attr,
+ NULL
+ }
+};
+
+static const struct attribute_group pc87427_group_pwm[4] = {
+ { .attrs = pc87427_attributes_pwm[0] },
+ { .attrs = pc87427_attributes_pwm[1] },
+ { .attrs = pc87427_attributes_pwm[2] },
+ { .attrs = pc87427_attributes_pwm[3] },
+};
+
+static ssize_t temp_input_show(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct pc87427_data *data = pc87427_update_device(dev);
+ int nr = to_sensor_dev_attr(devattr)->index;
+
+ return sprintf(buf, "%ld\n", temp_from_reg(data->temp[nr]));
+}
+
+static ssize_t temp_min_show(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct pc87427_data *data = pc87427_update_device(dev);
+ int nr = to_sensor_dev_attr(devattr)->index;
+
+ return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_min[nr]));
+}
+
+static ssize_t temp_max_show(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct pc87427_data *data = pc87427_update_device(dev);
+ int nr = to_sensor_dev_attr(devattr)->index;
+
+ return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_max[nr]));
+}
+
+static ssize_t temp_crit_show(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct pc87427_data *data = pc87427_update_device(dev);
+ int nr = to_sensor_dev_attr(devattr)->index;
+
+ return sprintf(buf, "%ld\n", temp_from_reg8(data->temp_crit[nr]));
+}
+
+static ssize_t temp_type_show(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct pc87427_data *data = pc87427_update_device(dev);
+ int nr = to_sensor_dev_attr(devattr)->index;
+
+ return sprintf(buf, "%u\n", temp_type_from_reg(data->temp_type[nr]));
+}
+
+static ssize_t temp_min_alarm_show(struct device *dev,
+ struct device_attribute *devattr,
+ char *buf)
+{
+ struct pc87427_data *data = pc87427_update_device(dev);
+ int nr = to_sensor_dev_attr(devattr)->index;
+
+ return sprintf(buf, "%d\n", !!(data->temp_status[nr]
+ & TEMP_STATUS_LOWFLG));
+}
+
+static ssize_t temp_max_alarm_show(struct device *dev,
+ struct device_attribute *devattr,
+ char *buf)
+{
+ struct pc87427_data *data = pc87427_update_device(dev);
+ int nr = to_sensor_dev_attr(devattr)->index;
+
+ return sprintf(buf, "%d\n", !!(data->temp_status[nr]
+ & TEMP_STATUS_HIGHFLG));
+}
+
+static ssize_t temp_crit_alarm_show(struct device *dev,
+ struct device_attribute *devattr,
+ char *buf)
+{
+ struct pc87427_data *data = pc87427_update_device(dev);
+ int nr = to_sensor_dev_attr(devattr)->index;
+
+ return sprintf(buf, "%d\n", !!(data->temp_status[nr]
+ & TEMP_STATUS_CRITFLG));
+}
+
+static ssize_t temp_fault_show(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct pc87427_data *data = pc87427_update_device(dev);
+ int nr = to_sensor_dev_attr(devattr)->index;
+
+ return sprintf(buf, "%d\n", !!(data->temp_status[nr]
+ & TEMP_STATUS_SENSERR));
+}
+
+static SENSOR_DEVICE_ATTR_RO(temp1_input, temp_input, 0);
+static SENSOR_DEVICE_ATTR_RO(temp2_input, temp_input, 1);
+static SENSOR_DEVICE_ATTR_RO(temp3_input, temp_input, 2);
+static SENSOR_DEVICE_ATTR_RO(temp4_input, temp_input, 3);
+static SENSOR_DEVICE_ATTR_RO(temp5_input, temp_input, 4);
+static SENSOR_DEVICE_ATTR_RO(temp6_input, temp_input, 5);
+
+static SENSOR_DEVICE_ATTR_RO(temp1_min, temp_min, 0);
+static SENSOR_DEVICE_ATTR_RO(temp2_min, temp_min, 1);
+static SENSOR_DEVICE_ATTR_RO(temp3_min, temp_min, 2);
+static SENSOR_DEVICE_ATTR_RO(temp4_min, temp_min, 3);
+static SENSOR_DEVICE_ATTR_RO(temp5_min, temp_min, 4);
+static SENSOR_DEVICE_ATTR_RO(temp6_min, temp_min, 5);
+
+static SENSOR_DEVICE_ATTR_RO(temp1_max, temp_max, 0);
+static SENSOR_DEVICE_ATTR_RO(temp2_max, temp_max, 1);
+static SENSOR_DEVICE_ATTR_RO(temp3_max, temp_max, 2);
+static SENSOR_DEVICE_ATTR_RO(temp4_max, temp_max, 3);
+static SENSOR_DEVICE_ATTR_RO(temp5_max, temp_max, 4);
+static SENSOR_DEVICE_ATTR_RO(temp6_max, temp_max, 5);
+
+static SENSOR_DEVICE_ATTR_RO(temp1_crit, temp_crit, 0);
+static SENSOR_DEVICE_ATTR_RO(temp2_crit, temp_crit, 1);
+static SENSOR_DEVICE_ATTR_RO(temp3_crit, temp_crit, 2);
+static SENSOR_DEVICE_ATTR_RO(temp4_crit, temp_crit, 3);
+static SENSOR_DEVICE_ATTR_RO(temp5_crit, temp_crit, 4);
+static SENSOR_DEVICE_ATTR_RO(temp6_crit, temp_crit, 5);
+
+static SENSOR_DEVICE_ATTR_RO(temp1_type, temp_type, 0);
+static SENSOR_DEVICE_ATTR_RO(temp2_type, temp_type, 1);
+static SENSOR_DEVICE_ATTR_RO(temp3_type, temp_type, 2);
+static SENSOR_DEVICE_ATTR_RO(temp4_type, temp_type, 3);
+static SENSOR_DEVICE_ATTR_RO(temp5_type, temp_type, 4);
+static SENSOR_DEVICE_ATTR_RO(temp6_type, temp_type, 5);
+
+static SENSOR_DEVICE_ATTR_RO(temp1_min_alarm, temp_min_alarm, 0);
+static SENSOR_DEVICE_ATTR_RO(temp2_min_alarm, temp_min_alarm, 1);
+static SENSOR_DEVICE_ATTR_RO(temp3_min_alarm, temp_min_alarm, 2);
+static SENSOR_DEVICE_ATTR_RO(temp4_min_alarm, temp_min_alarm, 3);
+static SENSOR_DEVICE_ATTR_RO(temp5_min_alarm, temp_min_alarm, 4);
+static SENSOR_DEVICE_ATTR_RO(temp6_min_alarm, temp_min_alarm, 5);
+
+static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, temp_max_alarm, 0);
+static SENSOR_DEVICE_ATTR_RO(temp2_max_alarm, temp_max_alarm, 1);
+static SENSOR_DEVICE_ATTR_RO(temp3_max_alarm, temp_max_alarm, 2);
+static SENSOR_DEVICE_ATTR_RO(temp4_max_alarm, temp_max_alarm, 3);
+static SENSOR_DEVICE_ATTR_RO(temp5_max_alarm, temp_max_alarm, 4);
+static SENSOR_DEVICE_ATTR_RO(temp6_max_alarm, temp_max_alarm, 5);
+
+static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, temp_crit_alarm, 0);
+static SENSOR_DEVICE_ATTR_RO(temp2_crit_alarm, temp_crit_alarm, 1);
+static SENSOR_DEVICE_ATTR_RO(temp3_crit_alarm, temp_crit_alarm, 2);
+static SENSOR_DEVICE_ATTR_RO(temp4_crit_alarm, temp_crit_alarm, 3);
+static SENSOR_DEVICE_ATTR_RO(temp5_crit_alarm, temp_crit_alarm, 4);
+static SENSOR_DEVICE_ATTR_RO(temp6_crit_alarm, temp_crit_alarm, 5);
+
+static SENSOR_DEVICE_ATTR_RO(temp1_fault, temp_fault, 0);
+static SENSOR_DEVICE_ATTR_RO(temp2_fault, temp_fault, 1);
+static SENSOR_DEVICE_ATTR_RO(temp3_fault, temp_fault, 2);
+static SENSOR_DEVICE_ATTR_RO(temp4_fault, temp_fault, 3);
+static SENSOR_DEVICE_ATTR_RO(temp5_fault, temp_fault, 4);
+static SENSOR_DEVICE_ATTR_RO(temp6_fault, temp_fault, 5);
+
+static struct attribute *pc87427_attributes_temp[6][10] = {
+ {
+ &sensor_dev_attr_temp1_input.dev_attr.attr,
+ &sensor_dev_attr_temp1_min.dev_attr.attr,
+ &sensor_dev_attr_temp1_max.dev_attr.attr,
+ &sensor_dev_attr_temp1_crit.dev_attr.attr,
+ &sensor_dev_attr_temp1_type.dev_attr.attr,
+ &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp1_fault.dev_attr.attr,
+ NULL
+ }, {
+ &sensor_dev_attr_temp2_input.dev_attr.attr,
+ &sensor_dev_attr_temp2_min.dev_attr.attr,
+ &sensor_dev_attr_temp2_max.dev_attr.attr,
+ &sensor_dev_attr_temp2_crit.dev_attr.attr,
+ &sensor_dev_attr_temp2_type.dev_attr.attr,
+ &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp2_fault.dev_attr.attr,
+ NULL
+ }, {
+ &sensor_dev_attr_temp3_input.dev_attr.attr,
+ &sensor_dev_attr_temp3_min.dev_attr.attr,
+ &sensor_dev_attr_temp3_max.dev_attr.attr,
+ &sensor_dev_attr_temp3_crit.dev_attr.attr,
+ &sensor_dev_attr_temp3_type.dev_attr.attr,
+ &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp3_fault.dev_attr.attr,
+ NULL
+ }, {
+ &sensor_dev_attr_temp4_input.dev_attr.attr,
+ &sensor_dev_attr_temp4_min.dev_attr.attr,
+ &sensor_dev_attr_temp4_max.dev_attr.attr,
+ &sensor_dev_attr_temp4_crit.dev_attr.attr,
+ &sensor_dev_attr_temp4_type.dev_attr.attr,
+ &sensor_dev_attr_temp4_min_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp4_fault.dev_attr.attr,
+ NULL
+ }, {
+ &sensor_dev_attr_temp5_input.dev_attr.attr,
+ &sensor_dev_attr_temp5_min.dev_attr.attr,
+ &sensor_dev_attr_temp5_max.dev_attr.attr,
+ &sensor_dev_attr_temp5_crit.dev_attr.attr,
+ &sensor_dev_attr_temp5_type.dev_attr.attr,
+ &sensor_dev_attr_temp5_min_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp5_max_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp5_crit_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp5_fault.dev_attr.attr,
+ NULL
+ }, {
+ &sensor_dev_attr_temp6_input.dev_attr.attr,
+ &sensor_dev_attr_temp6_min.dev_attr.attr,
+ &sensor_dev_attr_temp6_max.dev_attr.attr,
+ &sensor_dev_attr_temp6_crit.dev_attr.attr,
+ &sensor_dev_attr_temp6_type.dev_attr.attr,
+ &sensor_dev_attr_temp6_min_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp6_max_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp6_crit_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp6_fault.dev_attr.attr,
+ NULL
+ }
+};
+
+static const struct attribute_group pc87427_group_temp[6] = {
+ { .attrs = pc87427_attributes_temp[0] },
+ { .attrs = pc87427_attributes_temp[1] },
+ { .attrs = pc87427_attributes_temp[2] },
+ { .attrs = pc87427_attributes_temp[3] },
+ { .attrs = pc87427_attributes_temp[4] },
+ { .attrs = pc87427_attributes_temp[5] },
+};
+
+static ssize_t name_show(struct device *dev, struct device_attribute
+ *devattr, char *buf)
+{
+ struct pc87427_data *data = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%s\n", data->name);
+}
+static DEVICE_ATTR_RO(name);
+
+
+/*
+ * Device detection, attach and detach
+ */
+
+static int pc87427_request_regions(struct platform_device *pdev,
+ int count)
+{
+ struct resource *res;
+ int i;
+
+ for (i = 0; i < count; i++) {
+ res = platform_get_resource(pdev, IORESOURCE_IO, i);
+ if (!res) {
+ dev_err(&pdev->dev, "Missing resource #%d\n", i);
+ return -ENOENT;
+ }
+ if (!devm_request_region(&pdev->dev, res->start,
+ resource_size(res), DRVNAME)) {
+ dev_err(&pdev->dev,
+ "Failed to request region 0x%lx-0x%lx\n",
+ (unsigned long)res->start,
+ (unsigned long)res->end);
+ return -EBUSY;
+ }
+ }
+ return 0;
+}
+
+static void pc87427_init_device(struct device *dev)
+{
+ struct pc87427_sio_data *sio_data = dev_get_platdata(dev);
+ struct pc87427_data *data = dev_get_drvdata(dev);
+ int i;
+ u8 reg;
+
+ /* The FMC module should be ready */
+ reg = pc87427_read8(data, LD_FAN, PC87427_REG_BANK);
+ if (!(reg & 0x80))
+ dev_warn(dev, "%s module not ready!\n", "FMC");
+
+ /* Check which fans are enabled */
+ for (i = 0; i < 8; i++) {
+ if (!(sio_data->has_fanin & (1 << i))) /* Not wired */
+ continue;
+ reg = pc87427_read8_bank(data, LD_FAN, BANK_FM(i),
+ PC87427_REG_FAN_STATUS);
+ if (reg & FAN_STATUS_MONEN)
+ data->fan_enabled |= (1 << i);
+ }
+
+ if (!data->fan_enabled) {
+ dev_dbg(dev, "Enabling monitoring of all fans\n");
+ for (i = 0; i < 8; i++) {
+ if (!(sio_data->has_fanin & (1 << i))) /* Not wired */
+ continue;
+ pc87427_write8_bank(data, LD_FAN, BANK_FM(i),
+ PC87427_REG_FAN_STATUS,
+ FAN_STATUS_MONEN);
+ }
+ data->fan_enabled = sio_data->has_fanin;
+ }
+
+ /* Check which PWM outputs are enabled */
+ for (i = 0; i < 4; i++) {
+ if (!(sio_data->has_fanout & (1 << i))) /* Not wired */
+ continue;
+ reg = pc87427_read8_bank(data, LD_FAN, BANK_FC(i),
+ PC87427_REG_PWM_ENABLE);
+ if (reg & PWM_ENABLE_CTLEN)
+ data->pwm_enabled |= (1 << i);
+
+ /*
+ * We don't expose an interface to reconfigure the automatic
+ * fan control mode, so only allow to return to this mode if
+ * it was originally set.
+ */
+ if ((reg & PWM_ENABLE_MODE_MASK) == PWM_MODE_AUTO) {
+ dev_dbg(dev, "PWM%d is in automatic control mode\n",
+ i + 1);
+ data->pwm_auto_ok |= (1 << i);
+ }
+ }
+
+ /* The HMC module should be ready */
+ reg = pc87427_read8(data, LD_TEMP, PC87427_REG_BANK);
+ if (!(reg & 0x80))
+ dev_warn(dev, "%s module not ready!\n", "HMC");
+
+ /* Check which temperature channels are enabled */
+ for (i = 0; i < 6; i++) {
+ reg = pc87427_read8_bank(data, LD_TEMP, BANK_TM(i),
+ PC87427_REG_TEMP_STATUS);
+ if (reg & TEMP_STATUS_CHANEN)
+ data->temp_enabled |= (1 << i);
+ }
+}
+
+static void pc87427_remove_files(struct device *dev)
+{
+ struct pc87427_data *data = dev_get_drvdata(dev);
+ int i;
+
+ device_remove_file(dev, &dev_attr_name);
+ for (i = 0; i < 8; i++) {
+ if (!(data->fan_enabled & (1 << i)))
+ continue;
+ sysfs_remove_group(&dev->kobj, &pc87427_group_fan[i]);
+ }
+ for (i = 0; i < 4; i++) {
+ if (!(data->pwm_enabled & (1 << i)))
+ continue;
+ sysfs_remove_group(&dev->kobj, &pc87427_group_pwm[i]);
+ }
+ for (i = 0; i < 6; i++) {
+ if (!(data->temp_enabled & (1 << i)))
+ continue;
+ sysfs_remove_group(&dev->kobj, &pc87427_group_temp[i]);
+ }
+}
+
+static int pc87427_probe(struct platform_device *pdev)
+{
+ struct pc87427_sio_data *sio_data = dev_get_platdata(&pdev->dev);
+ struct pc87427_data *data;
+ int i, err, res_count;
+
+ data = devm_kzalloc(&pdev->dev, sizeof(struct pc87427_data),
+ GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->address[0] = sio_data->address[0];
+ data->address[1] = sio_data->address[1];
+ res_count = (data->address[0] != 0) + (data->address[1] != 0);
+
+ err = pc87427_request_regions(pdev, res_count);
+ if (err)
+ return err;
+
+ mutex_init(&data->lock);
+ data->name = "pc87427";
+ platform_set_drvdata(pdev, data);
+ pc87427_init_device(&pdev->dev);
+
+ /* Register sysfs hooks */
+ err = device_create_file(&pdev->dev, &dev_attr_name);
+ if (err)
+ return err;
+ for (i = 0; i < 8; i++) {
+ if (!(data->fan_enabled & (1 << i)))
+ continue;
+ err = sysfs_create_group(&pdev->dev.kobj,
+ &pc87427_group_fan[i]);
+ if (err)
+ goto exit_remove_files;
+ }
+ for (i = 0; i < 4; i++) {
+ if (!(data->pwm_enabled & (1 << i)))
+ continue;
+ err = sysfs_create_group(&pdev->dev.kobj,
+ &pc87427_group_pwm[i]);
+ if (err)
+ goto exit_remove_files;
+ }
+ for (i = 0; i < 6; i++) {
+ if (!(data->temp_enabled & (1 << i)))
+ continue;
+ err = sysfs_create_group(&pdev->dev.kobj,
+ &pc87427_group_temp[i]);
+ 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);
+ dev_err(&pdev->dev, "Class registration failed (%d)\n", err);
+ goto exit_remove_files;
+ }
+
+ return 0;
+
+exit_remove_files:
+ pc87427_remove_files(&pdev->dev);
+ return err;
+}
+
+static int pc87427_remove(struct platform_device *pdev)
+{
+ struct pc87427_data *data = platform_get_drvdata(pdev);
+
+ hwmon_device_unregister(data->hwmon_dev);
+ pc87427_remove_files(&pdev->dev);
+
+ return 0;
+}
+
+
+static struct platform_driver pc87427_driver = {
+ .driver = {
+ .name = DRVNAME,
+ },
+ .probe = pc87427_probe,
+ .remove = pc87427_remove,
+};
+
+static int __init pc87427_device_add(const struct pc87427_sio_data *sio_data)
+{
+ struct resource res[2] = {
+ { .flags = IORESOURCE_IO },
+ { .flags = IORESOURCE_IO },
+ };
+ int err, i, res_count;
+
+ res_count = 0;
+ for (i = 0; i < 2; i++) {
+ if (!sio_data->address[i])
+ continue;
+ res[res_count].start = sio_data->address[i];
+ res[res_count].end = sio_data->address[i] + REGION_LENGTH - 1;
+ res[res_count].name = logdev_str[i];
+
+ err = acpi_check_resource_conflict(&res[res_count]);
+ if (err)
+ goto exit;
+
+ res_count++;
+ }
+
+ pdev = platform_device_alloc(DRVNAME, res[0].start);
+ if (!pdev) {
+ err = -ENOMEM;
+ pr_err("Device allocation failed\n");
+ goto exit;
+ }
+
+ err = platform_device_add_resources(pdev, res, res_count);
+ if (err) {
+ pr_err("Device resource addition failed (%d)\n", err);
+ goto exit_device_put;
+ }
+
+ err = platform_device_add_data(pdev, sio_data,
+ sizeof(struct pc87427_sio_data));
+ if (err) {
+ pr_err("Platform data allocation failed\n");
+ 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 int __init pc87427_find(int sioaddr, struct pc87427_sio_data *sio_data)
+{
+ u16 val;
+ u8 cfg, cfg_b;
+ int i, err;
+
+ err = superio_enter(sioaddr);
+ if (err)
+ return err;
+
+ /* Identify device */
+ val = force_id ? force_id : superio_inb(sioaddr, SIOREG_DEVID);
+ if (val != 0xf2) { /* PC87427 */
+ err = -ENODEV;
+ goto exit;
+ }
+
+ for (i = 0; i < 2; i++) {
+ sio_data->address[i] = 0;
+ /* Select logical device */
+ superio_outb(sioaddr, SIOREG_LDSEL, logdev[i]);
+
+ val = superio_inb(sioaddr, SIOREG_ACT);
+ if (!(val & 0x01)) {
+ pr_info("Logical device 0x%02x not activated\n",
+ logdev[i]);
+ continue;
+ }
+
+ val = superio_inb(sioaddr, SIOREG_MAP);
+ if (val & 0x01) {
+ pr_warn("Logical device 0x%02x is memory-mapped, can't use\n",
+ logdev[i]);
+ continue;
+ }
+
+ val = (superio_inb(sioaddr, SIOREG_IOBASE) << 8)
+ | superio_inb(sioaddr, SIOREG_IOBASE + 1);
+ if (!val) {
+ pr_info("I/O base address not set for logical device 0x%02x\n",
+ logdev[i]);
+ continue;
+ }
+ sio_data->address[i] = val;
+ }
+
+ /* No point in loading the driver if everything is disabled */
+ if (!sio_data->address[0] && !sio_data->address[1]) {
+ err = -ENODEV;
+ goto exit;
+ }
+
+ /* Check which fan inputs are wired */
+ sio_data->has_fanin = (1 << 2) | (1 << 3); /* FANIN2, FANIN3 */
+
+ cfg = superio_inb(sioaddr, SIOREG_CF2);
+ if (!(cfg & (1 << 3)))
+ sio_data->has_fanin |= (1 << 0); /* FANIN0 */
+ if (!(cfg & (1 << 2)))
+ sio_data->has_fanin |= (1 << 4); /* FANIN4 */
+
+ cfg = superio_inb(sioaddr, SIOREG_CFD);
+ if (!(cfg & (1 << 0)))
+ sio_data->has_fanin |= (1 << 1); /* FANIN1 */
+
+ cfg = superio_inb(sioaddr, SIOREG_CF4);
+ if (!(cfg & (1 << 0)))
+ sio_data->has_fanin |= (1 << 7); /* FANIN7 */
+ cfg_b = superio_inb(sioaddr, SIOREG_CFB);
+ if (!(cfg & (1 << 1)) && (cfg_b & (1 << 3)))
+ sio_data->has_fanin |= (1 << 5); /* FANIN5 */
+ cfg = superio_inb(sioaddr, SIOREG_CF3);
+ if ((cfg & (1 << 3)) && !(cfg_b & (1 << 5)))
+ sio_data->has_fanin |= (1 << 6); /* FANIN6 */
+
+ /* Check which fan outputs are wired */
+ sio_data->has_fanout = (1 << 0); /* FANOUT0 */
+ if (cfg_b & (1 << 0))
+ sio_data->has_fanout |= (1 << 3); /* FANOUT3 */
+
+ cfg = superio_inb(sioaddr, SIOREG_CFC);
+ if (!(cfg & (1 << 4))) {
+ if (cfg_b & (1 << 1))
+ sio_data->has_fanout |= (1 << 1); /* FANOUT1 */
+ if (cfg_b & (1 << 2))
+ sio_data->has_fanout |= (1 << 2); /* FANOUT2 */
+ }
+
+ /* FANOUT1 and FANOUT2 can each be routed to 2 different pins */
+ cfg = superio_inb(sioaddr, SIOREG_CF5);
+ if (cfg & (1 << 6))
+ sio_data->has_fanout |= (1 << 1); /* FANOUT1 */
+ if (cfg & (1 << 5))
+ sio_data->has_fanout |= (1 << 2); /* FANOUT2 */
+
+exit:
+ superio_exit(sioaddr);
+ return err;
+}
+
+static int __init pc87427_init(void)
+{
+ int err;
+ struct pc87427_sio_data sio_data;
+
+ if (pc87427_find(0x2e, &sio_data)
+ && pc87427_find(0x4e, &sio_data))
+ return -ENODEV;
+
+ err = platform_driver_register(&pc87427_driver);
+ if (err)
+ goto exit;
+
+ /* Sets global pdev as a side effect */
+ err = pc87427_device_add(&sio_data);
+ if (err)
+ goto exit_driver;
+
+ return 0;
+
+exit_driver:
+ platform_driver_unregister(&pc87427_driver);
+exit:
+ return err;
+}
+
+static void __exit pc87427_exit(void)
+{
+ platform_device_unregister(pdev);
+ platform_driver_unregister(&pc87427_driver);
+}
+
+MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
+MODULE_DESCRIPTION("PC87427 hardware monitoring driver");
+MODULE_LICENSE("GPL");
+
+module_init(pc87427_init);
+module_exit(pc87427_exit);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-27 03:03:09 +0000