/*
- * dme1737.c - driver for the SMSC DME1737 and Asus A8000 Super-I/O chips
- * integrated hardware monitoring features.
+ * dme1737.c - Driver for the SMSC DME1737, Asus A8000, and SMSC SCH311x
+ * Super-I/O chips integrated hardware monitoring features.
* Copyright (c) 2007 Juerg Haefliger <juergh@gmail.com>
*
- * This driver is based on the LM85 driver. The hardware monitoring
- * capabilities of the DME1737 are very similar to the LM85 with some
- * additional features. Even though the DME1737 is a Super-I/O chip, the
- * hardware monitoring registers are only accessible via SMBus.
+ * This driver is an I2C/ISA hybrid, meaning that it uses the I2C bus to access
+ * the chip registers if a DME1737 (or A8000) is found and the ISA bus if a
+ * SCH311x chip is found. Both types of chips have very similar hardware
+ * monitoring capabilities but differ in the way they can be accessed.
*
* 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
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
+#include <linux/platform_device.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/hwmon-vid.h>
#include <linux/mutex.h>
#include <asm/io.h>
+/* ISA device, if found */
+static struct platform_device *pdev;
+
/* Module load parameters */
static int force_start;
module_param(force_start, bool, 0);
static const u8 DME1737_BIT_ALARM_FAN[] = {10, 11, 12, 13, 22, 23};
/* Miscellaneous registers */
+#define DME1737_REG_DEVICE 0x3d
#define DME1737_REG_COMPANY 0x3e
#define DME1737_REG_VERSTEP 0x3f
#define DME1737_REG_CONFIG 0x40
#define DME1737_COMPANY_SMSC 0x5c
#define DME1737_VERSTEP 0x88
#define DME1737_VERSTEP_MASK 0xf8
+#define SCH311X_DEVICE 0x8c
+
+/* Length of ISA address segment */
+#define DME1737_EXTENT 2
/* ---------------------------------------------------------------------
* Data structures and manipulation thereof
* --------------------------------------------------------------------- */
+/* For ISA chips, we abuse the i2c_client addr and name fields. We also use
+ the driver field to differentiate between I2C and ISA chips. */
struct dme1737_data {
struct i2c_client client;
- struct class_device *class_dev;
+ struct device *hwmon_dev;
struct mutex update_lock;
int valid; /* !=0 if following fields are valid */
/* ---------------------------------------------------------------------
* Device I/O access
+ *
+ * ISA access is performed through an index/data register pair and needs to
+ * be protected by a mutex during runtime (not required for initialization).
+ * We use data->update_lock for this and need to ensure that we acquire it
+ * before calling dme1737_read or dme1737_write.
* --------------------------------------------------------------------- */
static u8 dme1737_read(struct i2c_client *client, u8 reg)
{
- s32 val = i2c_smbus_read_byte_data(client, reg);
+ s32 val;
- if (val < 0) {
- dev_warn(&client->dev, "Read from register 0x%02x failed! "
- "Please report to the driver maintainer.\n", reg);
+ if (client->driver) { /* I2C device */
+ val = i2c_smbus_read_byte_data(client, reg);
+
+ if (val < 0) {
+ dev_warn(&client->dev, "Read from register "
+ "0x%02x failed! Please report to the driver "
+ "maintainer.\n", reg);
+ }
+ } else { /* ISA device */
+ outb(reg, client->addr);
+ val = inb(client->addr + 1);
}
return val;
}
-static s32 dme1737_write(struct i2c_client *client, u8 reg, u8 value)
+static s32 dme1737_write(struct i2c_client *client, u8 reg, u8 val)
{
- s32 res = i2c_smbus_write_byte_data(client, reg, value);
+ s32 res = 0;
- if (res < 0) {
- dev_warn(&client->dev, "Write to register 0x%02x failed! "
- "Please report to the driver maintainer.\n", reg);
+ if (client->driver) { /* I2C device */
+ res = i2c_smbus_write_byte_data(client, reg, val);
+
+ if (res < 0) {
+ dev_warn(&client->dev, "Write to register "
+ "0x%02x failed! Please report to the driver "
+ "maintainer.\n", reg);
+ }
+ } else { /* ISA device */
+ outb(reg, client->addr);
+ outb(val, client->addr + 1);
}
return res;
DME1737_REG_ALARM3) << 16;
}
+ /* The ISA chips require explicit clearing of alarm bits.
+ * Don't worry, an alarm will come back if the condition
+ * that causes it still exists */
+ if (!client->driver) {
+ if (data->alarms & 0xff0000) {
+ dme1737_write(client, DME1737_REG_ALARM3,
+ 0xff);
+ }
+ if (data->alarms & 0xff00) {
+ dme1737_write(client, DME1737_REG_ALARM2,
+ 0xff);
+ }
+ if (data->alarms & 0xff) {
+ dme1737_write(client, DME1737_REG_ALARM1,
+ 0xff);
+ }
+ }
+
data->last_update = jiffies;
data->valid = 1;
}
/* Only valid for fan[1-4] */
if (!(val == 1 || val == 2 || val == 4)) {
count = -EINVAL;
- dev_warn(&client->dev, "Fan type value %ld not "
+ dev_warn(dev, "Fan type value %ld not "
"supported. Choose one of 1, 2, or 4.\n",
val);
goto exit;
/* Only valid for pwm[1-3] */
if (val < 0 || val > 2) {
count = -EINVAL;
- dev_warn(&client->dev, "PWM enable %ld not "
+ dev_warn(dev, "PWM enable %ld not "
"supported. Choose one of 0, 1, or 2.\n",
val);
goto exit;
if (!(val == 1 || val == 2 || val == 4 ||
val == 6 || val == 7)) {
count = -EINVAL;
- dev_warn(&client->dev, "PWM auto channels zone %ld "
+ dev_warn(dev, "PWM auto channels zone %ld "
"not supported. Choose one of 1, 2, 4, 6, "
"or 7.\n", val);
goto exit;
return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
}
+static ssize_t show_name(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct dme1737_data *data = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%s\n", data->client.name);
+}
+
/* ---------------------------------------------------------------------
* Sysfs device attribute defines and structs
* --------------------------------------------------------------------- */
static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
+static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); /* for ISA devices */
#define SENSOR_DEV_ATTR_IN(ix) \
&sensor_dev_attr_in##ix##_input.dev_attr.attr, \
}
/* ---------------------------------------------------------------------
- * Device detection, registration and initialization
+ * Device initialization
* --------------------------------------------------------------------- */
static int dme1737_i2c_get_features(int, struct dme1737_data*);
}
sysfs_remove_group(&dev->kobj, &dme1737_group);
+
+ if (!data->client.driver) {
+ sysfs_remove_file(&dev->kobj, &dev_attr_name.attr);
+ }
}
static int dme1737_create_files(struct device *dev)
struct dme1737_data *data = dev_get_drvdata(dev);
int err, ix;
+ /* Create a name attribute for ISA devices */
+ if (!data->client.driver &&
+ (err = sysfs_create_file(&dev->kobj, &dev_attr_name.attr))) {
+ goto exit;
+ }
+
/* Create standard sysfs attributes */
if ((err = sysfs_create_group(&dev->kobj, &dme1737_group))) {
- goto exit;
+ goto exit_remove;
}
/* Create fan sysfs attributes */
return -EFAULT;
}
- data->config2 = dme1737_read(client, DME1737_REG_CONFIG2);
- /* Check if optional fan3 input is enabled */
- if (data->config2 & 0x04) {
- data->has_fan |= (1 << 2);
- }
+ /* Determine which optional fan and pwm features are enabled/present */
+ if (client->driver) { /* I2C chip */
+ data->config2 = dme1737_read(client, DME1737_REG_CONFIG2);
+ /* Check if optional fan3 input is enabled */
+ if (data->config2 & 0x04) {
+ data->has_fan |= (1 << 2);
+ }
- /* Fan4 and pwm3 are only available if the client's I2C address
- * is the default 0x2e. Otherwise the I/Os associated with these
- * functions are used for addr enable/select. */
- if (client->addr == 0x2e) {
- data->has_fan |= (1 << 3);
- data->has_pwm |= (1 << 2);
- }
+ /* Fan4 and pwm3 are only available if the client's I2C address
+ * is the default 0x2e. Otherwise the I/Os associated with
+ * these functions are used for addr enable/select. */
+ if (data->client.addr == 0x2e) {
+ data->has_fan |= (1 << 3);
+ data->has_pwm |= (1 << 2);
+ }
- /* Determine if the optional fan[5-6] and/or pwm[5-6] are enabled.
- * For this, we need to query the runtime registers through the
- * Super-IO LPC interface. Try both config ports 0x2e and 0x4e. */
- if (dme1737_i2c_get_features(0x2e, data) &&
- dme1737_i2c_get_features(0x4e, data)) {
- dev_warn(dev, "Failed to query Super-IO for optional "
- "features.\n");
+ /* Determine which of the optional fan[5-6] and pwm[5-6]
+ * features are enabled. For this, we need to query the runtime
+ * registers through the Super-IO LPC interface. Try both
+ * config ports 0x2e and 0x4e. */
+ if (dme1737_i2c_get_features(0x2e, data) &&
+ dme1737_i2c_get_features(0x4e, data)) {
+ dev_warn(dev, "Failed to query Super-IO for optional "
+ "features.\n");
+ }
+ } else { /* ISA chip */
+ /* Fan3 and pwm3 are always available. Fan[4-5] and pwm[5-6]
+ * don't exist in the ISA chip. */
+ data->has_fan |= (1 << 2);
+ data->has_pwm |= (1 << 2);
}
/* Fan1, fan2, pwm1, and pwm2 are always present */
reg = dme1737_read(client, DME1737_REG_TACH_PWM);
/* Inform if fan-to-pwm mapping differs from the default */
- if (reg != 0xa4) {
+ if (client->driver && reg != 0xa4) { /* I2C chip */
dev_warn(dev, "Non-standard fan to pwm mapping: "
"fan1->pwm%d, fan2->pwm%d, fan3->pwm%d, "
"fan4->pwm%d. Please report to the driver "
"maintainer.\n",
(reg & 0x03) + 1, ((reg >> 2) & 0x03) + 1,
((reg >> 4) & 0x03) + 1, ((reg >> 6) & 0x03) + 1);
+ } else if (!client->driver && reg != 0x24) { /* ISA chip */
+ dev_warn(dev, "Non-standard fan to pwm mapping: "
+ "fan1->pwm%d, fan2->pwm%d, fan3->pwm%d. "
+ "Please report to the driver maintainer.\n",
+ (reg & 0x03) + 1, ((reg >> 2) & 0x03) + 1,
+ ((reg >> 4) & 0x03) + 1);
}
/* Switch pwm[1-3] to manual mode if they are currently disabled and
}
/* Register device */
- data->class_dev = hwmon_device_register(dev);
- if (IS_ERR(data->class_dev)) {
+ data->hwmon_dev = hwmon_device_register(dev);
+ if (IS_ERR(data->hwmon_dev)) {
dev_err(dev, "Failed to register device.\n");
- err = PTR_ERR(data->class_dev);
+ err = PTR_ERR(data->hwmon_dev);
goto exit_remove;
}
struct dme1737_data *data = i2c_get_clientdata(client);
int err;
- hwmon_device_unregister(data->class_dev);
+ hwmon_device_unregister(data->hwmon_dev);
dme1737_remove_files(&client->dev);
if ((err = i2c_detach_client(client))) {
};
/* ---------------------------------------------------------------------
+ * ISA device detection and registration
+ * --------------------------------------------------------------------- */
+
+static int __init dme1737_isa_detect(int sio_cip, unsigned short *addr)
+{
+ int err = 0, reg;
+ unsigned short base_addr;
+
+ dme1737_sio_enter(sio_cip);
+
+ /* Check device ID
+ * We currently know about SCH3112 (0x7c), SCH3114 (0x7d), and
+ * SCH3116 (0x7f). */
+ reg = dme1737_sio_inb(sio_cip, 0x20);
+ if (!(reg == 0x7c || reg == 0x7d || reg == 0x7f)) {
+ err = -ENODEV;
+ goto exit;
+ }
+
+ /* Select logical device A (runtime registers) */
+ dme1737_sio_outb(sio_cip, 0x07, 0x0a);
+
+ /* Get the base address of the runtime registers */
+ if (!(base_addr = (dme1737_sio_inb(sio_cip, 0x60) << 8) |
+ dme1737_sio_inb(sio_cip, 0x61))) {
+ printk(KERN_ERR "dme1737: Base address not set.\n");
+ err = -ENODEV;
+ goto exit;
+ }
+
+ /* Access to the hwmon registers is through an index/data register
+ * pair located at offset 0x70/0x71. */
+ *addr = base_addr + 0x70;
+
+exit:
+ dme1737_sio_exit(sio_cip);
+ return err;
+}
+
+static int __init dme1737_isa_device_add(unsigned short addr)
+{
+ struct resource res = {
+ .start = addr,
+ .end = addr + DME1737_EXTENT - 1,
+ .name = "dme1737",
+ .flags = IORESOURCE_IO,
+ };
+ int err;
+
+ if (!(pdev = platform_device_alloc("dme1737", addr))) {
+ printk(KERN_ERR "dme1737: Failed to allocate device.\n");
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ if ((err = platform_device_add_resources(pdev, &res, 1))) {
+ printk(KERN_ERR "dme1737: Failed to add device resource "
+ "(err = %d).\n", err);
+ goto exit_device_put;
+ }
+
+ if ((err = platform_device_add(pdev))) {
+ printk(KERN_ERR "dme1737: Failed to add device (err = %d).\n",
+ err);
+ goto exit_device_put;
+ }
+
+ return 0;
+
+exit_device_put:
+ platform_device_put(pdev);
+ pdev = NULL;
+exit:
+ return err;
+}
+
+static int __devinit dme1737_isa_probe(struct platform_device *pdev)
+{
+ u8 company, device;
+ struct resource *res;
+ struct i2c_client *client;
+ struct dme1737_data *data;
+ struct device *dev = &pdev->dev;
+ int err;
+
+ res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+ if (!request_region(res->start, DME1737_EXTENT, "dme1737")) {
+ dev_err(dev, "Failed to request region 0x%04x-0x%04x.\n",
+ (unsigned short)res->start,
+ (unsigned short)res->start + DME1737_EXTENT - 1);
+ err = -EBUSY;
+ goto exit;
+ }
+
+ if (!(data = kzalloc(sizeof(struct dme1737_data), GFP_KERNEL))) {
+ err = -ENOMEM;
+ goto exit_release_region;
+ }
+
+ client = &data->client;
+ i2c_set_clientdata(client, data);
+ client->addr = res->start;
+ platform_set_drvdata(pdev, data);
+
+ company = dme1737_read(client, DME1737_REG_COMPANY);
+ device = dme1737_read(client, DME1737_REG_DEVICE);
+
+ if (!((company == DME1737_COMPANY_SMSC) &&
+ (device == SCH311X_DEVICE))) {
+ err = -ENODEV;
+ goto exit_kfree;
+ }
+
+ /* Fill in the remaining client fields and initialize the mutex */
+ strlcpy(client->name, "sch311x", I2C_NAME_SIZE);
+ mutex_init(&data->update_lock);
+
+ dev_info(dev, "Found a SCH311x chip at 0x%04x\n", client->addr);
+
+ /* Initialize the chip */
+ if ((err = dme1737_init_device(dev))) {
+ dev_err(dev, "Failed to initialize device.\n");
+ goto exit_kfree;
+ }
+
+ /* Create sysfs files */
+ if ((err = dme1737_create_files(dev))) {
+ dev_err(dev, "Failed to create sysfs files.\n");
+ goto exit_kfree;
+ }
+
+ /* Register device */
+ data->hwmon_dev = hwmon_device_register(dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ dev_err(dev, "Failed to register device.\n");
+ err = PTR_ERR(data->hwmon_dev);
+ goto exit_remove_files;
+ }
+
+ return 0;
+
+exit_remove_files:
+ dme1737_remove_files(dev);
+exit_kfree:
+ platform_set_drvdata(pdev, NULL);
+ kfree(data);
+exit_release_region:
+ release_region(res->start, DME1737_EXTENT);
+exit:
+ return err;
+}
+
+static int __devexit dme1737_isa_remove(struct platform_device *pdev)
+{
+ struct dme1737_data *data = platform_get_drvdata(pdev);
+
+ hwmon_device_unregister(data->hwmon_dev);
+ dme1737_remove_files(&pdev->dev);
+ release_region(data->client.addr, DME1737_EXTENT);
+ platform_set_drvdata(pdev, NULL);
+ kfree(data);
+
+ return 0;
+}
+
+static struct platform_driver dme1737_isa_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "dme1737",
+ },
+ .probe = dme1737_isa_probe,
+ .remove = __devexit_p(dme1737_isa_remove),
+};
+
+/* ---------------------------------------------------------------------
* Module initialization and cleanup
* --------------------------------------------------------------------- */
static int __init dme1737_init(void)
{
- return i2c_add_driver(&dme1737_i2c_driver);
+ int err;
+ unsigned short addr;
+
+ if ((err = i2c_add_driver(&dme1737_i2c_driver))) {
+ goto exit;
+ }
+
+ if (dme1737_isa_detect(0x2e, &addr) &&
+ dme1737_isa_detect(0x4e, &addr)) {
+ /* Return 0 if we didn't find an ISA device */
+ return 0;
+ }
+
+ if ((err = platform_driver_register(&dme1737_isa_driver))) {
+ goto exit_del_i2c_driver;
+ }
+
+ /* Sets global pdev as a side effect */
+ if ((err = dme1737_isa_device_add(addr))) {
+ goto exit_del_isa_driver;
+ }
+
+ return 0;
+
+exit_del_isa_driver:
+ platform_driver_unregister(&dme1737_isa_driver);
+exit_del_i2c_driver:
+ i2c_del_driver(&dme1737_i2c_driver);
+exit:
+ return err;
}
static void __exit dme1737_exit(void)
{
+ if (pdev) {
+ platform_device_unregister(pdev);
+ platform_driver_unregister(&dme1737_isa_driver);
+ }
+
i2c_del_driver(&dme1737_i2c_driver);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff