diff options
Diffstat (limited to 'drivers/hwmon/dme1737.c')
| -rw-r--r-- | drivers/hwmon/dme1737.c | 375 |
1 files changed, 334 insertions, 41 deletions
diff --git a/drivers/hwmon/dme1737.c b/drivers/hwmon/dme1737.c index ec8edd2a8cbd..a878c98e252e 100644 --- a/drivers/hwmon/dme1737.c +++ b/drivers/hwmon/dme1737.c @@ -1,12 +1,12 @@ /* - * 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 @@ -28,6 +28,7 @@ #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> @@ -35,6 +36,9 @@ #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); @@ -133,6 +137,7 @@ static const u8 DME1737_BIT_ALARM_TEMP[] = {4, 5, 6}; 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 @@ -148,11 +153,17 @@ static const u8 DME1737_BIT_ALARM_FAN[] = {10, 11, 12, 13, 22, 23}; #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 device *hwmon_dev; @@ -465,27 +476,48 @@ static inline int PWM_OFF_TO_REG(int val, int ix, int reg) /* --------------------------------------------------------------------- * 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 (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); + 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; @@ -630,6 +662,24 @@ static struct dme1737_data *dme1737_update_device(struct device *dev) 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; } @@ -995,7 +1045,7 @@ static ssize_t set_fan(struct device *dev, struct device_attribute *attr, /* 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; @@ -1122,7 +1172,7 @@ static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, /* 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; @@ -1223,7 +1273,7 @@ static ssize_t set_pwm(struct device *dev, struct device_attribute *attr, 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; @@ -1311,6 +1361,14 @@ static ssize_t show_vid(struct device *dev, struct device_attribute *attr, 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 * --------------------------------------------------------------------- */ @@ -1446,6 +1504,7 @@ SENSOR_DEVICE_ATTR_PWM_5TO6(6); 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, \ @@ -1698,7 +1757,7 @@ static inline void dme1737_sio_outb(int sio_cip, int reg, int val) } /* --------------------------------------------------------------------- - * Device detection, registration and initialization + * Device initialization * --------------------------------------------------------------------- */ static int dme1737_i2c_get_features(int, struct dme1737_data*); @@ -1743,6 +1802,10 @@ static void dme1737_remove_files(struct device *dev) } 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) @@ -1750,9 +1813,15 @@ 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 */ @@ -1840,27 +1909,36 @@ static int dme1737_init_device(struct device *dev) 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 */ @@ -1879,13 +1957,19 @@ static int dme1737_init_device(struct device *dev) 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 @@ -2094,16 +2178,225 @@ static struct i2c_driver dme1737_i2c_driver = { }; /* --------------------------------------------------------------------- + * 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); } |