diff options
Diffstat (limited to 'drivers/hwmon/w83781d.c')
| -rw-r--r-- | drivers/hwmon/w83781d.c | 976 |
1 files changed, 531 insertions, 445 deletions
diff --git a/drivers/hwmon/w83781d.c b/drivers/hwmon/w83781d.c index f942ecdd47c8..d4d1b859d4f1 100644 --- a/drivers/hwmon/w83781d.c +++ b/drivers/hwmon/w83781d.c @@ -4,7 +4,7 @@ Copyright (c) 1998 - 2001 Frodo Looijaard <frodol@dds.nl>, Philip Edelbrock <phil@netroedge.com>, and Mark Studebaker <mdsxyz123@yahoo.com> - Copyright (c) 2007 Jean Delvare <khali@linux-fr.org> + Copyright (c) 2007 - 2008 Jean Delvare <khali@linux-fr.org> 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 @@ -38,25 +38,24 @@ #include <linux/slab.h> #include <linux/jiffies.h> #include <linux/i2c.h> -#include <linux/platform_device.h> -#include <linux/ioport.h> #include <linux/hwmon.h> #include <linux/hwmon-vid.h> #include <linux/hwmon-sysfs.h> #include <linux/sysfs.h> #include <linux/err.h> #include <linux/mutex.h> + +#ifdef CONFIG_ISA +#include <linux/platform_device.h> +#include <linux/ioport.h> #include <asm/io.h> -#include "lm75.h" +#endif -/* ISA device, if found */ -static struct platform_device *pdev; +#include "lm75.h" /* Addresses to scan */ static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, I2C_CLIENT_END }; -static unsigned short isa_address = 0x290; - /* Insmod parameters */ I2C_CLIENT_INSMOD_4(w83781d, w83782d, w83783s, as99127f); I2C_CLIENT_MODULE_PARM(force_subclients, "List of subclient addresses: " @@ -178,9 +177,9 @@ FAN_FROM_REG(u8 val, int div) #define TEMP_FROM_REG(val) ((val) * 1000) #define BEEP_MASK_FROM_REG(val,type) ((type) == as99127f ? \ - (val) ^ 0x7fff : (val)) + (~(val)) & 0x7fff : (val) & 0xff7fff) #define BEEP_MASK_TO_REG(val,type) ((type) == as99127f ? \ - (~(val)) & 0x7fff : (val) & 0xffffff) + (~(val)) & 0x7fff : (val) & 0xff7fff) #define DIV_FROM_REG(val) (1 << (val)) @@ -199,25 +198,16 @@ DIV_TO_REG(long val, enum chips type) return i; } -/* There are some complications in a module like this. First off, W83781D chips - may be both present on the SMBus and the ISA bus, and we have to handle - those cases separately at some places. Second, there might be several - W83781D chips available (well, actually, that is probably never done; but - it is a clean illustration of how to handle a case like that). Finally, - a specific chip may be attached to *both* ISA and SMBus, and we would - not like to detect it double. Fortunately, in the case of the W83781D at - least, a register tells us what SMBus address we are on, so that helps - a bit - except if there could be more than one SMBus. Groan. No solution - for this yet. */ - -/* 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 w83781d_data { - struct i2c_client client; + struct i2c_client *client; struct device *hwmon_dev; struct mutex lock; enum chips type; + /* For ISA device only */ + const char *name; + int isa_addr; + struct mutex update_lock; char valid; /* !=0 if following fields are valid */ unsigned long last_updated; /* In jiffies */ @@ -240,7 +230,6 @@ struct w83781d_data { u8 vid; /* Register encoding, combined */ u32 alarms; /* Register encoding, combined */ u32 beep_mask; /* Register encoding, combined */ - u8 beep_enable; /* Boolean */ u8 pwm[4]; /* Register value */ u8 pwm2_enable; /* Boolean */ u16 sens[3]; /* 782D/783S only. @@ -249,36 +238,14 @@ struct w83781d_data { u8 vrm; }; -static int w83781d_attach_adapter(struct i2c_adapter *adapter); -static int w83781d_detect(struct i2c_adapter *adapter, int address, int kind); -static int w83781d_detach_client(struct i2c_client *client); - -static int __devinit w83781d_isa_probe(struct platform_device *pdev); -static int __devexit w83781d_isa_remove(struct platform_device *pdev); +static struct w83781d_data *w83781d_data_if_isa(void); +static int w83781d_alias_detect(struct i2c_client *client, u8 chipid); static int w83781d_read_value(struct w83781d_data *data, u16 reg); static int w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value); static struct w83781d_data *w83781d_update_device(struct device *dev); static void w83781d_init_device(struct device *dev); -static struct i2c_driver w83781d_driver = { - .driver = { - .name = "w83781d", - }, - .attach_adapter = w83781d_attach_adapter, - .detach_client = w83781d_detach_client, -}; - -static struct platform_driver w83781d_isa_driver = { - .driver = { - .owner = THIS_MODULE, - .name = "w83781d", - }, - .probe = w83781d_isa_probe, - .remove = w83781d_isa_remove, -}; - - /* following are the sysfs callback functions */ #define show_in_reg(reg) \ static ssize_t show_##reg (struct device *dev, struct device_attribute *da, \ @@ -513,11 +480,6 @@ static ssize_t show_beep_mask (struct device *dev, struct device_attribute *attr return sprintf(buf, "%ld\n", (long)BEEP_MASK_FROM_REG(data->beep_mask, data->type)); } -static ssize_t show_beep_enable (struct device *dev, struct device_attribute *attr, char *buf) -{ - struct w83781d_data *data = w83781d_update_device(dev); - return sprintf(buf, "%ld\n", (long)data->beep_enable); -} static ssize_t store_beep_mask(struct device *dev, struct device_attribute *attr, @@ -529,12 +491,12 @@ store_beep_mask(struct device *dev, struct device_attribute *attr, val = simple_strtoul(buf, NULL, 10); mutex_lock(&data->update_lock); - data->beep_mask = BEEP_MASK_TO_REG(val, data->type); + data->beep_mask &= 0x8000; /* preserve beep enable */ + data->beep_mask |= BEEP_MASK_TO_REG(val, data->type); w83781d_write_value(data, W83781D_REG_BEEP_INTS1, data->beep_mask & 0xff); w83781d_write_value(data, W83781D_REG_BEEP_INTS2, - ((data->beep_mask >> 8) & 0x7f) - | data->beep_enable << 7); + (data->beep_mask >> 8) & 0xff); if (data->type != w83781d && data->type != as99127f) { w83781d_write_value(data, W83781D_REG_BEEP_INTS3, ((data->beep_mask) >> 16) & 0xff); @@ -544,31 +506,8 @@ store_beep_mask(struct device *dev, struct device_attribute *attr, return count; } -static ssize_t -store_beep_enable(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) -{ - struct w83781d_data *data = dev_get_drvdata(dev); - u32 val; - - val = simple_strtoul(buf, NULL, 10); - if (val != 0 && val != 1) - return -EINVAL; - - mutex_lock(&data->update_lock); - data->beep_enable = val; - val = w83781d_read_value(data, W83781D_REG_BEEP_INTS2) & 0x7f; - val |= data->beep_enable << 7; - w83781d_write_value(data, W83781D_REG_BEEP_INTS2, val); - mutex_unlock(&data->update_lock); - - return count; -} - static DEVICE_ATTR(beep_mask, S_IRUGO | S_IWUSR, show_beep_mask, store_beep_mask); -static DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR, - show_beep_enable, store_beep_enable); static ssize_t show_beep(struct device *dev, struct device_attribute *attr, char *buf) @@ -663,6 +602,8 @@ static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO | S_IWUSR, show_beep, store_beep, 5); static SENSOR_DEVICE_ATTR(temp3_beep, S_IRUGO, show_temp3_beep, store_beep, 13); +static SENSOR_DEVICE_ATTR(beep_enable, S_IRUGO | S_IWUSR, + show_beep, store_beep, 15); static ssize_t show_fan_div(struct device *dev, struct device_attribute *da, char *buf) @@ -866,45 +807,19 @@ static SENSOR_DEVICE_ATTR(temp2_type, S_IRUGO | S_IWUSR, static SENSOR_DEVICE_ATTR(temp3_type, S_IRUGO | S_IWUSR, show_sensor, store_sensor, 2); -/* I2C devices get this name attribute automatically, but for ISA devices - we must create it by ourselves. */ -static ssize_t -show_name(struct device *dev, struct device_attribute *devattr, char *buf) -{ - struct w83781d_data *data = dev_get_drvdata(dev); - return sprintf(buf, "%s\n", data->client.name); -} -static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); - -/* This function is called when: - * w83781d_driver is inserted (when this module is loaded), for each - available adapter - * when a new adapter is inserted (and w83781d_driver is still present) */ -static int -w83781d_attach_adapter(struct i2c_adapter *adapter) -{ - if (!(adapter->class & I2C_CLASS_HWMON)) - return 0; - return i2c_probe(adapter, &addr_data, w83781d_detect); -} - /* Assumes that adapter is of I2C, not ISA variety. * OTHERWISE DON'T CALL THIS */ static int -w83781d_detect_subclients(struct i2c_adapter *adapter, int address, int kind, - struct i2c_client *new_client) +w83781d_detect_subclients(struct i2c_client *new_client) { int i, val1 = 0, id; int err; - const char *client_name = ""; + int address = new_client->addr; + unsigned short sc_addr[2]; + struct i2c_adapter *adapter = new_client->adapter; struct w83781d_data *data = i2c_get_clientdata(new_client); - - data->lm75[0] = kzalloc(sizeof(struct i2c_client), GFP_KERNEL); - if (!(data->lm75[0])) { - err = -ENOMEM; - goto ERROR_SC_0; - } + enum chips kind = data->type; id = i2c_adapter_id(adapter); @@ -922,55 +837,35 @@ w83781d_detect_subclients(struct i2c_adapter *adapter, int address, int kind, w83781d_write_value(data, W83781D_REG_I2C_SUBADDR, (force_subclients[2] & 0x07) | ((force_subclients[3] & 0x07) << 4)); - data->lm75[0]->addr = force_subclients[2]; + sc_addr[0] = force_subclients[2]; } else { val1 = w83781d_read_value(data, W83781D_REG_I2C_SUBADDR); - data->lm75[0]->addr = 0x48 + (val1 & 0x07); + sc_addr[0] = 0x48 + (val1 & 0x07); } if (kind != w83783s) { - data->lm75[1] = kzalloc(sizeof(struct i2c_client), GFP_KERNEL); - if (!(data->lm75[1])) { - err = -ENOMEM; - goto ERROR_SC_1; - } - if (force_subclients[0] == id && force_subclients[1] == address) { - data->lm75[1]->addr = force_subclients[3]; + sc_addr[1] = force_subclients[3]; } else { - data->lm75[1]->addr = 0x48 + ((val1 >> 4) & 0x07); + sc_addr[1] = 0x48 + ((val1 >> 4) & 0x07); } - if (data->lm75[0]->addr == data->lm75[1]->addr) { + if (sc_addr[0] == sc_addr[1]) { dev_err(&new_client->dev, "Duplicate addresses 0x%x for subclients.\n", - data->lm75[0]->addr); + sc_addr[0]); err = -EBUSY; goto ERROR_SC_2; } } - if (kind == w83781d) - client_name = "w83781d subclient"; - else if (kind == w83782d) - client_name = "w83782d subclient"; - else if (kind == w83783s) - client_name = "w83783s subclient"; - else if (kind == as99127f) - client_name = "as99127f subclient"; - for (i = 0; i <= 1; i++) { - /* store all data in w83781d */ - i2c_set_clientdata(data->lm75[i], NULL); - data->lm75[i]->adapter = adapter; - data->lm75[i]->driver = &w83781d_driver; - data->lm75[i]->flags = 0; - strlcpy(data->lm75[i]->name, client_name, - I2C_NAME_SIZE); - if ((err = i2c_attach_client(data->lm75[i]))) { + data->lm75[i] = i2c_new_dummy(adapter, sc_addr[i]); + if (!data->lm75[i]) { dev_err(&new_client->dev, "Subclient %d " "registration at address 0x%x " - "failed.\n", i, data->lm75[i]->addr); + "failed.\n", i, sc_addr[i]); + err = -ENOMEM; if (i == 1) goto ERROR_SC_3; goto ERROR_SC_2; @@ -983,12 +878,9 @@ w83781d_detect_subclients(struct i2c_adapter *adapter, int address, int kind, /* Undo inits in case of errors */ ERROR_SC_3: - i2c_detach_client(data->lm75[0]); + i2c_unregister_device(data->lm75[0]); ERROR_SC_2: - kfree(data->lm75[1]); ERROR_SC_1: - kfree(data->lm75[0]); -ERROR_SC_0: return err; } @@ -1029,7 +921,7 @@ static struct attribute* w83781d_attributes[] = { &dev_attr_vrm.attr, &dev_attr_alarms.attr, &dev_attr_beep_mask.attr, - &dev_attr_beep_enable.attr, + &sensor_dev_attr_beep_enable.dev_attr.attr, NULL }; static const struct attribute_group w83781d_group = { @@ -1151,96 +1043,74 @@ w83781d_create_files(struct device *dev, int kind, int is_isa) } } - if (is_isa) { - err = device_create_file(&pdev->dev, &dev_attr_name); - if (err) - return err; - } - return 0; } +/* Return 0 if detection is successful, -ENODEV otherwise */ static int -w83781d_detect(struct i2c_adapter *adapter, int address, int kind) +w83781d_detect(struct i2c_client *client, int kind, + struct i2c_board_info *info) { int val1 = 0, val2; - struct i2c_client *client; - struct device *dev; - struct w83781d_data *data; - int err; + struct w83781d_data *isa = w83781d_data_if_isa(); + struct i2c_adapter *adapter = client->adapter; + int address = client->addr; const char *client_name = ""; enum vendor { winbond, asus } vendid; - if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { - err = -EINVAL; - goto ERROR1; - } - - /* OK. For now, we presume we have a valid client. We now create the - client structure, even though we cannot fill it completely yet. - But it allows us to access w83781d_{read,write}_value. */ - - if (!(data = kzalloc(sizeof(struct w83781d_data), GFP_KERNEL))) { - err = -ENOMEM; - goto ERROR1; - } - - client = &data->client; - i2c_set_clientdata(client, data); - client->addr = address; - mutex_init(&data->lock); - client->adapter = adapter; - client->driver = &w83781d_driver; - dev = &client->dev; + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) + return -ENODEV; - /* Now, we do the remaining detection. */ + /* We block updates of the ISA device to minimize the risk of + concurrent access to the same W83781D chip through different + interfaces. */ + if (isa) + mutex_lock(&isa->update_lock); /* The w8378?d may be stuck in some other bank than bank 0. This may make reading other information impossible. Specify a force=... or force_*=... parameter, and the Winbond will be reset to the right bank. */ if (kind < 0) { - if (w83781d_read_value(data, W83781D_REG_CONFIG) & 0x80) { + if (i2c_smbus_read_byte_data + (client, W83781D_REG_CONFIG) & 0x80) { dev_dbg(&adapter->dev, "Detection of w83781d chip " "failed at step 3\n"); - err = -ENODEV; - goto ERROR2; + goto err_nodev; } - val1 = w83781d_read_value(data, W83781D_REG_BANK); - val2 = w83781d_read_value(data, W83781D_REG_CHIPMAN); + val1 = i2c_smbus_read_byte_data(client, W83781D_REG_BANK); + val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN); /* Check for Winbond or Asus ID if in bank 0 */ if ((!(val1 & 0x07)) && (((!(val1 & 0x80)) && (val2 != 0xa3) && (val2 != 0xc3)) || ((val1 & 0x80) && (val2 != 0x5c) && (val2 != 0x12)))) { dev_dbg(&adapter->dev, "Detection of w83781d chip " "failed at step 4\n"); - err = -ENODEV; - goto ERROR2; + goto err_nodev; } /* If Winbond SMBus, check address at 0x48. Asus doesn't support, except for as99127f rev.2 */ if ((!(val1 & 0x80) && (val2 == 0xa3)) || ((val1 & 0x80) && (val2 == 0x5c))) { - if (w83781d_read_value - (data, W83781D_REG_I2C_ADDR) != address) { + if (i2c_smbus_read_byte_data + (client, W83781D_REG_I2C_ADDR) != address) { dev_dbg(&adapter->dev, "Detection of w83781d " "chip failed at step 5\n"); - err = -ENODEV; - goto ERROR2; + goto err_nodev; } } } /* We have either had a force parameter, or we have already detected the Winbond. Put it now into bank 0 and Vendor ID High Byte */ - w83781d_write_value(data, W83781D_REG_BANK, - (w83781d_read_value(data, W83781D_REG_BANK) - & 0x78) | 0x80); + i2c_smbus_write_byte_data(client, W83781D_REG_BANK, + (i2c_smbus_read_byte_data(client, W83781D_REG_BANK) + & 0x78) | 0x80); /* Determine the chip type. */ if (kind <= 0) { /* get vendor ID */ - val2 = w83781d_read_value(data, W83781D_REG_CHIPMAN); + val2 = i2c_smbus_read_byte_data(client, W83781D_REG_CHIPMAN); if (val2 == 0x5c) vendid = winbond; else if (val2 == 0x12) @@ -1248,11 +1118,10 @@ w83781d_detect(struct i2c_adapter *adapter, int address, int kind) else { dev_dbg(&adapter->dev, "w83781d chip vendor is " "neither Winbond nor Asus\n"); - err = -ENODEV; - goto ERROR2; + goto err_nodev; } - val1 = w83781d_read_value(data, W83781D_REG_WCHIPID); + val1 = i2c_smbus_read_byte_data(client, W83781D_REG_WCHIPID); if ((val1 == 0x10 || val1 == 0x11) && vendid == winbond) kind = w83781d; else if (val1 == 0x30 && vendid == winbond) @@ -1266,11 +1135,20 @@ w83781d_detect(struct i2c_adapter *adapter, int address, int kind) dev_warn(&adapter->dev, "Ignoring 'force' " "parameter for unknown chip at " "address 0x%02x\n", address); - err = -EINVAL; - goto ERROR2; + goto err_nodev; + } + + if ((kind == w83781d || kind == w83782d) + && w83781d_alias_detect(client, val1)) { + dev_dbg(&adapter->dev, "Device at 0x%02x appears to " + "be the same as ISA device\n", address); + goto err_nodev; } } + if (isa) + mutex_unlock(&isa->update_lock); + if (kind == w83781d) { client_name = "w83781d"; } else if (kind == w83782d) { @@ -1281,24 +1159,46 @@ w83781d_detect(struct i2c_adapter *adapter, int address, int kind) client_name = "as99127f"; } - /* Fill in the remaining client fields and put into the global list */ - strlcpy(client->name, client_name, I2C_NAME_SIZE); - data->type = kind; + strlcpy(info->type, client_name, I2C_NAME_SIZE); + + return 0; + + err_nodev: + if (isa) + mutex_unlock(&isa->update_lock); + return -ENODEV; +} + +static int +w83781d_probe(struct i2c_client *client, const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + struct w83781d_data *data; + int err; + + data = kzalloc(sizeof(struct w83781d_data), GFP_KERNEL); + if (!data) { + err = -ENOMEM; + goto ERROR1; + } + + i2c_set_clientdata(client, data); + mutex_init(&data->lock); + mutex_init(&data->update_lock); - /* Tell the I2C layer a new client has arrived */ - if ((err = i2c_attach_client(client))) - goto ERROR2; + data->type = id->driver_data; + data->client = client; /* attach secondary i2c lm75-like clients */ - if ((err = w83781d_detect_subclients(adapter, address, - kind, client))) + err = w83781d_detect_subclients(client); + if (err) goto ERROR3; /* Initialize the chip */ w83781d_init_device(dev); /* Register sysfs hooks */ - err = w83781d_create_files(dev, kind, 0); + err = w83781d_create_files(dev, data->type, 0); if (err) goto ERROR4; @@ -1314,264 +1214,113 @@ ERROR4: sysfs_remove_group(&dev->kobj, &w83781d_group); sysfs_remove_group(&dev->kobj, &w83781d_group_opt); - if (data->lm75[1]) { - i2c_detach_client(data->lm75[1]); - kfree(data->lm75[1]); - } - if (data->lm75[0]) { - i2c_detach_client(data->lm75[0]); - kfree(data->lm75[0]); - } + if (data->lm75[0]) + i2c_unregister_device(data->lm75[0]); + if (data->lm75[1]) + i2c_unregister_device(data->lm75[1]); ERROR3: - i2c_detach_client(client); -ERROR2: + i2c_set_clientdata(client, NULL); kfree(data); ERROR1: return err; } static int -w83781d_detach_client(struct i2c_client *client) +w83781d_remove(struct i2c_client *client) { struct w83781d_data *data = i2c_get_clientdata(client); - int err; - - /* main client */ - if (data) { - hwmon_device_unregister(data->hwmon_dev); - sysfs_remove_group(&client->dev.kobj, &w83781d_group); - sysfs_remove_group(&client->dev.kobj, &w83781d_group_opt); - } - - if ((err = i2c_detach_client(client))) - return err; + struct device *dev = &client->dev; - /* main client */ - if (data) - kfree(data); - - /* subclient */ - else - kfree(client); - - return 0; -} - -static int __devinit -w83781d_isa_probe(struct platform_device *pdev) -{ - int err, reg; - struct w83781d_data *data; - struct resource *res; - const char *name; - - /* Reserve the ISA region */ - res = platform_get_resource(pdev, IORESOURCE_IO, 0); - if (!request_region(res->start + W83781D_ADDR_REG_OFFSET, 2, - "w83781d")) { - err = -EBUSY; - goto exit; - } - - if (!(data = kzalloc(sizeof(struct w83781d_data), GFP_KERNEL))) { - err = -ENOMEM; - goto exit_release_region; - } - mutex_init(&data->lock); - data->client.addr = res->start; - i2c_set_clientdata(&data->client, data); - platform_set_drvdata(pdev, data); - - reg = w83781d_read_value(data, W83781D_REG_WCHIPID); - switch (reg) { - case 0x30: - data->type = w83782d; - name = "w83782d"; - break; - default: - data->type = w83781d; - name = "w83781d"; - } - strlcpy(data->client.name, name, I2C_NAME_SIZE); - - /* Initialize the W83781D chip */ - w83781d_init_device(&pdev->dev); - - /* Register sysfs hooks */ - err = w83781d_create_files(&pdev->dev, data->type, 1); - 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; + hwmon_device_unregister(data->hwmon_dev); - exit_remove_files: - sysfs_remove_group(&pdev->dev.kobj, &w83781d_group); - sysfs_remove_group(&pdev->dev.kobj, &w83781d_group_opt); - device_remove_file(&pdev->dev, &dev_attr_name); - kfree(data); - exit_release_region: - release_region(res->start + W83781D_ADDR_REG_OFFSET, 2); - exit: - return err; -} + sysfs_remove_group(&dev->kobj, &w83781d_group); + sysfs_remove_group(&dev->kobj, &w83781d_group_opt); -static int __devexit -w83781d_isa_remove(struct platform_device *pdev) -{ - struct w83781d_data *data = platform_get_drvdata(pdev); + if (data->lm75[0]) + i2c_unregister_device(data->lm75[0]); + if (data->lm75[1]) + i2c_unregister_device(data->lm75[1]); - hwmon_device_unregister(data->hwmon_dev); - sysfs_remove_group(&pdev->dev.kobj, &w83781d_group); - sysfs_remove_group(&pdev->dev.kobj, &w83781d_group_opt); - device_remove_file(&pdev->dev, &dev_attr_name); - release_region(data->client.addr + W83781D_ADDR_REG_OFFSET, 2); + i2c_set_clientdata(client, NULL); kfree(data); return 0; } -/* The SMBus locks itself, usually, but nothing may access the Winbond between - bank switches. ISA access must always be locked explicitly! - We ignore the W83781D BUSY flag at this moment - it could lead to deadlocks, - would slow down the W83781D access and should not be necessary. - There are some ugly typecasts here, but the good news is - they should - nowhere else be necessary! */ static int -w83781d_read_value(struct w83781d_data *data, u16 reg) +w83781d_read_value_i2c(struct w83781d_data *data, u16 reg) { - struct i2c_client *client = &data->client; - int res, word_sized, bank; + struct i2c_client *client = data->client; + int res, bank; struct i2c_client *cl; - mutex_lock(&data->lock); - if (!client->driver) { /* ISA device */ - word_sized = (((reg & 0xff00) == 0x100) - || ((reg & 0xff00) == 0x200)) - && (((reg & 0x00ff) == 0x50) - || ((reg & 0x00ff) == 0x53) - || ((reg & 0x00ff) == 0x55)); - if (reg & 0xff00) { - outb_p(W83781D_REG_BANK, - client->addr + W83781D_ADDR_REG_OFFSET); - outb_p(reg >> 8, - client->addr + W83781D_DATA_REG_OFFSET); - } - outb_p(reg & 0xff, client->addr + W83781D_ADDR_REG_OFFSET); - res = inb_p(client->addr + W83781D_DATA_REG_OFFSET); - if (word_sized) { - outb_p((reg & 0xff) + 1, - client->addr + W83781D_ADDR_REG_OFFSET); - res = - (res << 8) + inb_p(client->addr + - W83781D_DATA_REG_OFFSET); - } - if (reg & 0xff00) { - outb_p(W83781D_REG_BANK, - client->addr + W83781D_ADDR_REG_OFFSET); - outb_p(0, client->addr + W83781D_DATA_REG_OFFSET); - } + bank = (reg >> 8) & 0x0f; + if (bank > 2) + /* switch banks */ + i2c_smbus_write_byte_data(client, W83781D_REG_BANK, + bank); + if (bank == 0 || bank > 2) { + res = i2c_smbus_read_byte_data(client, reg & 0xff); } else { - bank = (reg >> 8) & 0x0f; - if (bank > 2) - /* switch banks */ - i2c_smbus_write_byte_data(client, W83781D_REG_BANK, - bank); - if (bank == 0 || bank > 2) { - res = i2c_smbus_read_byte_data(client, reg & 0xff); - } else { - /* switch to subclient */ - cl = data->lm75[bank - 1]; - /* convert from ISA to LM75 I2C addresses */ - switch (reg & 0xff) { - case 0x50: /* TEMP */ - res = swab16(i2c_smbus_read_word_data(cl, 0)); - break; - case 0x52: /* CONFIG */ - res = i2c_smbus_read_byte_data(cl, 1); - break; - case 0x53: /* HYST */ - res = swab16(i2c_smbus_read_word_data(cl, 2)); - break; - case 0x55: /* OVER */ - default: - res = swab16(i2c_smbus_read_word_data(cl, 3)); - break; - } + /* switch to subclient */ + cl = data->lm75[bank - 1]; + /* convert from ISA to LM75 I2C addresses */ + switch (reg & 0xff) { + case 0x50: /* TEMP */ + res = swab16(i2c_smbus_read_word_data(cl, 0)); + break; + case 0x52: /* CONFIG */ + res = i2c_smbus_read_byte_data(cl, 1); + break; + case 0x53: /* HYST */ + res = swab16(i2c_smbus_read_word_data(cl, 2)); + break; + case 0x55: /* OVER */ + default: + res = swab16(i2c_smbus_read_word_data(cl, 3)); + break; } - if (bank > 2) - i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0); } - mutex_unlock(&data->lock); + if (bank > 2) + i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0); + return res; } static int -w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value) +w83781d_write_value_i2c(struct w83781d_data *data, u16 reg, u16 value) { - struct i2c_client *client = &data->client; - int word_sized, bank; + struct i2c_client *client = data->client; + int bank; struct i2c_client *cl; - mutex_lock(&data->lock); - if (!client->driver) { /* ISA device */ - word_sized = (((reg & 0xff00) == 0x100) - || ((reg & 0xff00) == 0x200)) - && (((reg & 0x00ff) == 0x53) - || ((reg & 0x00ff) == 0x55)); - if (reg & 0xff00) { - outb_p(W83781D_REG_BANK, - client->addr + W83781D_ADDR_REG_OFFSET); - outb_p(reg >> 8, - client->addr + W83781D_DATA_REG_OFFSET); - } - outb_p(reg & 0xff, client->addr + W83781D_ADDR_REG_OFFSET); - if (word_sized) { - outb_p(value >> 8, - client->addr + W83781D_DATA_REG_OFFSET); - outb_p((reg & 0xff) + 1, - client->addr + W83781D_ADDR_REG_OFFSET); - } - outb_p(value & 0xff, client->addr + W83781D_DATA_REG_OFFSET); - if (reg & 0xff00) { - outb_p(W83781D_REG_BANK, - client->addr + W83781D_ADDR_REG_OFFSET); - outb_p(0, client->addr + W83781D_DATA_REG_OFFSET); - } + bank = (reg >> 8) & 0x0f; + if (bank > 2) + /* switch banks */ + i2c_smbus_write_byte_data(client, W83781D_REG_BANK, + bank); + if (bank == 0 || bank > 2) { + i2c_smbus_write_byte_data(client, reg & 0xff, + value & 0xff); } else { - bank = (reg >> 8) & 0x0f; - if (bank > 2) - /* switch banks */ - i2c_smbus_write_byte_data(client, W83781D_REG_BANK, - bank); - if (bank == 0 || bank > 2) { - i2c_smbus_write_byte_data(client, reg & 0xff, - value & 0xff); - } else { - /* switch to subclient */ - cl = data->lm75[bank - 1]; - /* convert from ISA to LM75 I2C addresses */ - switch (reg & 0xff) { - case 0x52: /* CONFIG */ - i2c_smbus_write_byte_data(cl, 1, value & 0xff); - break; - case 0x53: /* HYST */ - i2c_smbus_write_word_data(cl, 2, swab16(value)); - break; - case 0x55: /* OVER */ - i2c_smbus_write_word_data(cl, 3, swab16(value)); - break; - } + /* switch to subclient */ + cl = data->lm75[bank - 1]; + /* convert from ISA to LM75 I2C addresses */ + switch (reg & 0xff) { + case 0x52: /* CONFIG */ + i2c_smbus_write_byte_data(cl, 1, value & 0xff); + break; + case 0x53: /* HYST */ + i2c_smbus_write_word_data(cl, 2, swab16(value)); + break; + case 0x55: /* OVER */ + i2c_smbus_write_word_data(cl, 3, swab16(value)); + break; } - if (bank > 2) - i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0); } - mutex_unlock(&data->lock); + if (bank > 2) + i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0); + return 0; } @@ -1678,7 +1427,7 @@ w83781d_init_device(struct device *dev) static struct w83781d_data *w83781d_update_device(struct device *dev) { struct w83781d_data *data = dev_get_drvdata(dev); - struct i2c_client *client = &data->client; + struct i2c_client *client = data->client; int i; mutex_lock(&data->update_lock); @@ -1775,8 +1524,7 @@ static struct w83781d_data *w83781d_update_device(struct device *dev) W83781D_REG_ALARM2) << 8); } i = w83781d_read_value(data, W83781D_REG_BEEP_INTS2); - data->beep_enable = i >> 7; - data->beep_mask = ((i & 0x7f) << 8) + + data->beep_mask = (i << 8) + w83781d_read_value(data, W83781D_REG_BEEP_INTS1); if ((data->type != w83781d) && (data->type != as99127f)) { data->beep_mask |= @@ -1792,6 +1540,275 @@ static struct w83781d_data *w83781d_update_device(struct device *dev) return data; } +static const struct i2c_device_id w83781d_ids[] = { + { "w83781d", w83781d, }, + { "w83782d", w83782d, }, + { "w83783s", w83783s, }, + { "as99127f", as99127f }, + { /* LIST END */ } +}; +MODULE_DEVICE_TABLE(i2c, w83781d_ids); + +static struct i2c_driver w83781d_driver = { + .class = I2C_CLASS_HWMON, + .driver = { + .name = "w83781d", + }, + .probe = w83781d_probe, + .remove = w83781d_remove, + .id_table = w83781d_ids, + .detect = w83781d_detect, + .address_data = &addr_data, +}; + +/* + * ISA related code + */ +#ifdef CONFIG_ISA + +/* ISA device, if found */ +static struct platform_device *pdev; + +static unsigned short isa_address = 0x290; + +/* I2C devices get this name attribute automatically, but for ISA devices + we must create it by ourselves. */ +static ssize_t +show_name(struct device *dev, struct device_attribute *devattr, char *buf) +{ + struct w83781d_data *data = dev_get_drvdata(dev); + return sprintf(buf, "%s\n", data->name); +} +static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); + +static struct w83781d_data *w83781d_data_if_isa(void) +{ + return pdev ? platform_get_drvdata(pdev) : NULL; +} + +/* Returns 1 if the I2C chip appears to be an alias of the ISA chip */ +static int w83781d_alias_detect(struct i2c_client *client, u8 chipid) +{ + struct w83781d_data *isa; + int i; + + if (!pdev) /* No ISA chip */ + return 0; + + isa = platform_get_drvdata(pdev); + + if (w83781d_read_value(isa, W83781D_REG_I2C_ADDR) != client->addr) + return 0; /* Address doesn't match */ + if (w83781d_read_value(isa, W83781D_REG_WCHIPID) != chipid) + return 0; /* Chip type doesn't match */ + + /* We compare all the limit registers, the config register and the + * interrupt mask registers */ + for (i = 0x2b; i <= 0x3d; i++) { + if (w83781d_read_value(isa, i) != + i2c_smbus_read_byte_data(client, i)) + return 0; + } + if (w83781d_read_value(isa, W83781D_REG_CONFIG) != + i2c_smbus_read_byte_data(client, W83781D_REG_CONFIG)) + return 0; + for (i = 0x43; i <= 0x46; i++) { + if (w83781d_read_value(isa, i) != + i2c_smbus_read_byte_data(client, i)) + return 0; + } + + return 1; +} + +static int +w83781d_read_value_isa(struct w83781d_data *data, u16 reg) +{ + int word_sized, res; + + word_sized = (((reg & 0xff00) == 0x100) + || ((reg & 0xff00) == 0x200)) + && (((reg & 0x00ff) == 0x50) + || ((reg & 0x00ff) == 0x53) + || ((reg & 0x00ff) == 0x55)); + if (reg & 0xff00) { + outb_p(W83781D_REG_BANK, + data->isa_addr + W83781D_ADDR_REG_OFFSET); + outb_p(reg >> 8, + data->isa_addr + W83781D_DATA_REG_OFFSET); + } + outb_p(reg & 0xff, data->isa_addr + W83781D_ADDR_REG_OFFSET); + res = inb_p(data->isa_addr + W83781D_DATA_REG_OFFSET); + if (word_sized) { + outb_p((reg & 0xff) + 1, + data->isa_addr + W83781D_ADDR_REG_OFFSET); + res = + (res << 8) + inb_p(data->isa_addr + + W83781D_DATA_REG_OFFSET); + } + if (reg & 0xff00) { + outb_p(W83781D_REG_BANK, + data->isa_addr + W83781D_ADDR_REG_OFFSET); + outb_p(0, data->isa_addr + W83781D_DATA_REG_OFFSET); + } + return res; +} + +static void +w83781d_write_value_isa(struct w83781d_data *data, u16 reg, u16 value) +{ + int word_sized; + + word_sized = (((reg & 0xff00) == 0x100) + || ((reg & 0xff00) == 0x200)) + && (((reg & 0x00ff) == 0x53) + || ((reg & 0x00ff) == 0x55)); + if (reg & 0xff00) { + outb_p(W83781D_REG_BANK, + data->isa_addr + W83781D_ADDR_REG_OFFSET); + outb_p(reg >> 8, + data->isa_addr + W83781D_DATA_REG_OFFSET); + } + outb_p(reg & 0xff, data->isa_addr + W83781D_ADDR_REG_OFFSET); + if (word_sized) { + outb_p(value >> 8, + data->isa_addr + W83781D_DATA_REG_OFFSET); + outb_p((reg & 0xff) + 1, + data->isa_addr + W83781D_ADDR_REG_OFFSET); + } + outb_p(value & 0xff, data->isa_addr + W83781D_DATA_REG_OFFSET); + if (reg & 0xff00) { + outb_p(W83781D_REG_BANK, + data->isa_addr + W83781D_ADDR_REG_OFFSET); + outb_p(0, data->isa_addr + W83781D_DATA_REG_OFFSET); + } +} + +/* The SMBus locks itself, usually, but nothing may access the Winbond between + bank switches. ISA access must always be locked explicitly! + We ignore the W83781D BUSY flag at this moment - it could lead to deadlocks, + would slow down the W83781D access and should not be necessary. + There are some ugly typecasts here, but the good news is - they should + nowhere else be necessary! */ +static int +w83781d_read_value(struct w83781d_data *data, u16 reg) +{ + struct i2c_client *client = data->client; + int res; + + mutex_lock(&data->lock); + if (client) + res = w83781d_read_value_i2c(data, reg); + else + res = w83781d_read_value_isa(data, reg); + mutex_unlock(&data->lock); + return res; +} + +static int +w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value) +{ + struct i2c_client *client = data->client; + + mutex_lock(&data->lock); + if (client) + w83781d_write_value_i2c(data, reg, value); + else + w83781d_write_value_isa(data, reg, value); + mutex_unlock(&data->lock); + return 0; +} + +static int __devinit +w83781d_isa_probe(struct platform_device *pdev) +{ + int err, reg; + struct w83781d_data *data; + struct resource *res; + + /* Reserve the ISA region */ + res = platform_get_resource(pdev, IORESOURCE_IO, 0); + if (!request_region(res->start + W83781D_ADDR_REG_OFFSET, 2, + "w83781d")) { + err = -EBUSY; + goto exit; + } + + data = kzalloc(sizeof(struct w83781d_data), GFP_KERNEL); + if (!data) { + err = -ENOMEM; + goto exit_release_region; + } + mutex_init(&data->lock); + data->isa_addr = res->start; + platform_set_drvdata(pdev, data); + + reg = w83781d_read_value(data, W83781D_REG_WCHIPID); + switch (reg) { + case 0x30: + data->type = w83782d; + data->name = "w83782d"; + break; + default: + data->type = w83781d; + data->name = "w83781d"; + } + + /* Initialize the W83781D chip */ + w83781d_init_device(&pdev->dev); + + /* Register sysfs hooks */ + err = w83781d_create_files(&pdev->dev, data->type, 1); + if (err) + goto exit_remove_files; + + err = device_create_file(&pdev->dev, &dev_attr_name); + 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, &w83781d_group); + sysfs_remove_group(&pdev->dev.kobj, &w83781d_group_opt); + device_remove_file(&pdev->dev, &dev_attr_name); + kfree(data); + exit_release_region: + release_region(res->start + W83781D_ADDR_REG_OFFSET, 2); + exit: + return err; +} + +static int __devexit +w83781d_isa_remove(struct platform_device *pdev) +{ + struct w83781d_data *data = platform_get_drvdata(pdev); + + hwmon_device_unregister(data->hwmon_dev); + sysfs_remove_group(&pdev->dev.kobj, &w83781d_group); + sysfs_remove_group(&pdev->dev.kobj, &w83781d_group_opt); + device_remove_file(&pdev->dev, &dev_attr_name); + release_region(data->isa_addr + W83781D_ADDR_REG_OFFSET, 2); + kfree(data); + + return 0; +} + +static struct platform_driver w83781d_isa_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "w83781d", + }, + .probe = w83781d_isa_probe, + .remove = __devexit_p(w83781d_isa_remove), +}; + /* return 1 if a supported chip is found, 0 otherwise */ static int __init w83781d_isa_found(unsigned short address) @@ -1928,18 +1945,14 @@ w83781d_isa_device_add(unsigned short address) } static int __init -sensors_w83781d_init(void) +w83781d_isa_register(void) { int res; - res = i2c_add_driver(&w83781d_driver); - if (res) - goto exit; - if (w83781d_isa_found(isa_address)) { res = platform_driver_register(&w83781d_isa_driver); if (res) - goto exit_unreg_i2c_driver; + goto exit; /* Sets global pdev as a side effect */ res = w83781d_isa_device_add(isa_address); @@ -1949,21 +1962,94 @@ sensors_w83781d_init(void) return 0; - exit_unreg_isa_driver: +exit_unreg_isa_driver: platform_driver_unregister(&w83781d_isa_driver); - exit_unreg_i2c_driver: - i2c_del_driver(&w83781d_driver); - exit: +exit: return res; } static void __exit -sensors_w83781d_exit(void) +w83781d_isa_unregister(void) { if (pdev) { platform_device_unregister(pdev); platform_driver_unregister(&w83781d_isa_driver); } +} +#else /* !CONFIG_ISA */ + +static struct w83781d_data *w83781d_data_if_isa(void) +{ + return NULL; +} + +static int +w83781d_alias_detect(struct i2c_client *client, u8 chipid) +{ + return 0; +} + +static int +w83781d_read_value(struct w83781d_data *data, u16 reg) +{ + int res; + + mutex_lock(&data->lock); + res = w83781d_read_value_i2c(data, reg); + mutex_unlock(&data->lock); + + return res; +} + +static int +w83781d_write_value(struct w83781d_data *data, u16 reg, u16 value) +{ + mutex_lock(&data->lock); + w83781d_write_value_i2c(data, reg, value); + mutex_unlock(&data->lock); + + return 0; +} + +static int __init +w83781d_isa_register(void) +{ + return 0; +} + +static void __exit +w83781d_isa_unregister(void) +{ +} +#endif /* CONFIG_ISA */ + +static int __init +sensors_w83781d_init(void) +{ + int res; + + /* We register the ISA device first, so that we can skip the + * registration of an I2C interface to the same device. */ + res = w83781d_isa_register(); + if (res) + goto exit; + + res = i2c_add_driver(&w83781d_driver); + if (res) + goto exit_unreg_isa; + + return 0; + + exit_unreg_isa: + w83781d_isa_unregister(); + exit: + return res; +} + +static void __exit +sensors_w83781d_exit(void) +{ + w83781d_isa_unregister(); i2c_del_driver(&w83781d_driver); } |