aboutsummaryrefslogtreecommitdiff
path: root/drivers/hwmon/adm1021.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/hwmon/adm1021.c')
-rw-r--r--drivers/hwmon/adm1021.c402
1 files changed, 402 insertions, 0 deletions
diff --git a/drivers/hwmon/adm1021.c b/drivers/hwmon/adm1021.c
new file mode 100644
index 000000000000..d2c774c32f45
--- /dev/null
+++ b/drivers/hwmon/adm1021.c
@@ -0,0 +1,402 @@
+/*
+ adm1021.c - Part of lm_sensors, Linux kernel modules for hardware
+ monitoring
+ Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and
+ Philip Edelbrock <phil@netroedge.com>
+
+ 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
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/i2c.h>
+#include <linux/i2c-sensor.h>
+
+
+/* Addresses to scan */
+static unsigned short normal_i2c[] = { 0x18, 0x19, 0x1a,
+ 0x29, 0x2a, 0x2b,
+ 0x4c, 0x4d, 0x4e,
+ I2C_CLIENT_END };
+static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END };
+
+/* Insmod parameters */
+SENSORS_INSMOD_8(adm1021, adm1023, max1617, max1617a, thmc10, lm84, gl523sm, mc1066);
+
+/* adm1021 constants specified below */
+
+/* The adm1021 registers */
+/* Read-only */
+#define ADM1021_REG_TEMP 0x00
+#define ADM1021_REG_REMOTE_TEMP 0x01
+#define ADM1021_REG_STATUS 0x02
+#define ADM1021_REG_MAN_ID 0x0FE /* 0x41 = AMD, 0x49 = TI, 0x4D = Maxim, 0x23 = Genesys , 0x54 = Onsemi*/
+#define ADM1021_REG_DEV_ID 0x0FF /* ADM1021 = 0x0X, ADM1023 = 0x3X */
+#define ADM1021_REG_DIE_CODE 0x0FF /* MAX1617A */
+/* These use different addresses for reading/writing */
+#define ADM1021_REG_CONFIG_R 0x03
+#define ADM1021_REG_CONFIG_W 0x09
+#define ADM1021_REG_CONV_RATE_R 0x04
+#define ADM1021_REG_CONV_RATE_W 0x0A
+/* These are for the ADM1023's additional precision on the remote temp sensor */
+#define ADM1021_REG_REM_TEMP_PREC 0x010
+#define ADM1021_REG_REM_OFFSET 0x011
+#define ADM1021_REG_REM_OFFSET_PREC 0x012
+#define ADM1021_REG_REM_TOS_PREC 0x013
+#define ADM1021_REG_REM_THYST_PREC 0x014
+/* limits */
+#define ADM1021_REG_TOS_R 0x05
+#define ADM1021_REG_TOS_W 0x0B
+#define ADM1021_REG_REMOTE_TOS_R 0x07
+#define ADM1021_REG_REMOTE_TOS_W 0x0D
+#define ADM1021_REG_THYST_R 0x06
+#define ADM1021_REG_THYST_W 0x0C
+#define ADM1021_REG_REMOTE_THYST_R 0x08
+#define ADM1021_REG_REMOTE_THYST_W 0x0E
+/* write-only */
+#define ADM1021_REG_ONESHOT 0x0F
+
+
+/* Conversions. Rounding and limit checking is only done on the TO_REG
+ variants. Note that you should be a bit careful with which arguments
+ these macros are called: arguments may be evaluated more than once.
+ Fixing this is just not worth it. */
+/* Conversions note: 1021 uses normal integer signed-byte format*/
+#define TEMP_FROM_REG(val) (val > 127 ? (val-256)*1000 : val*1000)
+#define TEMP_TO_REG(val) (SENSORS_LIMIT((val < 0 ? (val/1000)+256 : val/1000),0,255))
+
+/* Initial values */
+
+/* Note: Even though I left the low and high limits named os and hyst,
+they don't quite work like a thermostat the way the LM75 does. I.e.,
+a lower temp than THYST actually triggers an alarm instead of
+clearing it. Weird, ey? --Phil */
+
+/* Each client has this additional data */
+struct adm1021_data {
+ struct i2c_client client;
+ enum chips type;
+
+ struct semaphore update_lock;
+ char valid; /* !=0 if following fields are valid */
+ unsigned long last_updated; /* In jiffies */
+
+ u8 temp_max; /* Register values */
+ u8 temp_hyst;
+ u8 temp_input;
+ u8 remote_temp_max;
+ u8 remote_temp_hyst;
+ u8 remote_temp_input;
+ u8 alarms;
+ /* Special values for ADM1023 only */
+ u8 remote_temp_prec;
+ u8 remote_temp_os_prec;
+ u8 remote_temp_hyst_prec;
+ u8 remote_temp_offset;
+ u8 remote_temp_offset_prec;
+};
+
+static int adm1021_attach_adapter(struct i2c_adapter *adapter);
+static int adm1021_detect(struct i2c_adapter *adapter, int address, int kind);
+static void adm1021_init_client(struct i2c_client *client);
+static int adm1021_detach_client(struct i2c_client *client);
+static int adm1021_read_value(struct i2c_client *client, u8 reg);
+static int adm1021_write_value(struct i2c_client *client, u8 reg,
+ u16 value);
+static struct adm1021_data *adm1021_update_device(struct device *dev);
+
+/* (amalysh) read only mode, otherwise any limit's writing confuse BIOS */
+static int read_only = 0;
+
+
+/* This is the driver that will be inserted */
+static struct i2c_driver adm1021_driver = {
+ .owner = THIS_MODULE,
+ .name = "adm1021",
+ .id = I2C_DRIVERID_ADM1021,
+ .flags = I2C_DF_NOTIFY,
+ .attach_adapter = adm1021_attach_adapter,
+ .detach_client = adm1021_detach_client,
+};
+
+#define show(value) \
+static ssize_t show_##value(struct device *dev, struct device_attribute *attr, char *buf) \
+{ \
+ struct adm1021_data *data = adm1021_update_device(dev); \
+ return sprintf(buf, "%d\n", TEMP_FROM_REG(data->value)); \
+}
+show(temp_max);
+show(temp_hyst);
+show(temp_input);
+show(remote_temp_max);
+show(remote_temp_hyst);
+show(remote_temp_input);
+
+#define show2(value) \
+static ssize_t show_##value(struct device *dev, struct device_attribute *attr, char *buf) \
+{ \
+ struct adm1021_data *data = adm1021_update_device(dev); \
+ return sprintf(buf, "%d\n", data->value); \
+}
+show2(alarms);
+
+#define set(value, reg) \
+static ssize_t set_##value(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
+{ \
+ struct i2c_client *client = to_i2c_client(dev); \
+ struct adm1021_data *data = i2c_get_clientdata(client); \
+ int temp = simple_strtoul(buf, NULL, 10); \
+ \
+ down(&data->update_lock); \
+ data->value = TEMP_TO_REG(temp); \
+ adm1021_write_value(client, reg, data->value); \
+ up(&data->update_lock); \
+ return count; \
+}
+set(temp_max, ADM1021_REG_TOS_W);
+set(temp_hyst, ADM1021_REG_THYST_W);
+set(remote_temp_max, ADM1021_REG_REMOTE_TOS_W);
+set(remote_temp_hyst, ADM1021_REG_REMOTE_THYST_W);
+
+static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max, set_temp_max);
+static DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_hyst, set_temp_hyst);
+static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input, NULL);
+static DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_remote_temp_max, set_remote_temp_max);
+static DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_remote_temp_hyst, set_remote_temp_hyst);
+static DEVICE_ATTR(temp2_input, S_IRUGO, show_remote_temp_input, NULL);
+static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
+
+
+static int adm1021_attach_adapter(struct i2c_adapter *adapter)
+{
+ if (!(adapter->class & I2C_CLASS_HWMON))
+ return 0;
+ return i2c_detect(adapter, &addr_data, adm1021_detect);
+}
+
+static int adm1021_detect(struct i2c_adapter *adapter, int address, int kind)
+{
+ int i;
+ struct i2c_client *new_client;
+ struct adm1021_data *data;
+ int err = 0;
+ const char *type_name = "";
+
+ /* Make sure we aren't probing the ISA bus!! This is just a safety check
+ at this moment; i2c_detect really won't call us. */
+#ifdef DEBUG
+ if (i2c_is_isa_adapter(adapter)) {
+ dev_dbg(&adapter->dev, "adm1021_detect called for an ISA bus adapter?!?\n");
+ return 0;
+ }
+#endif
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ goto error0;
+
+ /* 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 adm1021_{read,write}_value. */
+
+ if (!(data = kmalloc(sizeof(struct adm1021_data), GFP_KERNEL))) {
+ err = -ENOMEM;
+ goto error0;
+ }
+ memset(data, 0, sizeof(struct adm1021_data));
+
+ new_client = &data->client;
+ i2c_set_clientdata(new_client, data);
+ new_client->addr = address;
+ new_client->adapter = adapter;
+ new_client->driver = &adm1021_driver;
+ new_client->flags = 0;
+
+ /* Now, we do the remaining detection. */
+ if (kind < 0) {
+ if ((adm1021_read_value(new_client, ADM1021_REG_STATUS) & 0x03) != 0x00
+ || (adm1021_read_value(new_client, ADM1021_REG_CONFIG_R) & 0x3F) != 0x00
+ || (adm1021_read_value(new_client, ADM1021_REG_CONV_RATE_R) & 0xF8) != 0x00) {
+ err = -ENODEV;
+ goto error1;
+ }
+ }
+
+ /* Determine the chip type. */
+ if (kind <= 0) {
+ i = adm1021_read_value(new_client, ADM1021_REG_MAN_ID);
+ if (i == 0x41)
+ if ((adm1021_read_value(new_client, ADM1021_REG_DEV_ID) & 0x0F0) == 0x030)
+ kind = adm1023;
+ else
+ kind = adm1021;
+ else if (i == 0x49)
+ kind = thmc10;
+ else if (i == 0x23)
+ kind = gl523sm;
+ else if ((i == 0x4d) &&
+ (adm1021_read_value(new_client, ADM1021_REG_DEV_ID) == 0x01))
+ kind = max1617a;
+ else if (i == 0x54)
+ kind = mc1066;
+ /* LM84 Mfr ID in a different place, and it has more unused bits */
+ else if (adm1021_read_value(new_client, ADM1021_REG_CONV_RATE_R) == 0x00
+ && (kind == 0 /* skip extra detection */
+ || ((adm1021_read_value(new_client, ADM1021_REG_CONFIG_R) & 0x7F) == 0x00
+ && (adm1021_read_value(new_client, ADM1021_REG_STATUS) & 0xAB) == 0x00)))
+ kind = lm84;
+ else
+ kind = max1617;
+ }
+
+ if (kind == max1617) {
+ type_name = "max1617";
+ } else if (kind == max1617a) {
+ type_name = "max1617a";
+ } else if (kind == adm1021) {
+ type_name = "adm1021";
+ } else if (kind == adm1023) {
+ type_name = "adm1023";
+ } else if (kind == thmc10) {
+ type_name = "thmc10";
+ } else if (kind == lm84) {
+ type_name = "lm84";
+ } else if (kind == gl523sm) {
+ type_name = "gl523sm";
+ } else if (kind == mc1066) {
+ type_name = "mc1066";
+ }
+
+ /* Fill in the remaining client fields and put it into the global list */
+ strlcpy(new_client->name, type_name, I2C_NAME_SIZE);
+ data->type = kind;
+ data->valid = 0;
+ init_MUTEX(&data->update_lock);
+
+ /* Tell the I2C layer a new client has arrived */
+ if ((err = i2c_attach_client(new_client)))
+ goto error1;
+
+ /* Initialize the ADM1021 chip */
+ if (kind != lm84)
+ adm1021_init_client(new_client);
+
+ /* Register sysfs hooks */
+ device_create_file(&new_client->dev, &dev_attr_temp1_max);
+ device_create_file(&new_client->dev, &dev_attr_temp1_min);
+ device_create_file(&new_client->dev, &dev_attr_temp1_input);
+ device_create_file(&new_client->dev, &dev_attr_temp2_max);
+ device_create_file(&new_client->dev, &dev_attr_temp2_min);
+ device_create_file(&new_client->dev, &dev_attr_temp2_input);
+ device_create_file(&new_client->dev, &dev_attr_alarms);
+
+ return 0;
+
+error1:
+ kfree(data);
+error0:
+ return err;
+}
+
+static void adm1021_init_client(struct i2c_client *client)
+{
+ /* Enable ADC and disable suspend mode */
+ adm1021_write_value(client, ADM1021_REG_CONFIG_W,
+ adm1021_read_value(client, ADM1021_REG_CONFIG_R) & 0xBF);
+ /* Set Conversion rate to 1/sec (this can be tinkered with) */
+ adm1021_write_value(client, ADM1021_REG_CONV_RATE_W, 0x04);
+}
+
+static int adm1021_detach_client(struct i2c_client *client)
+{
+ int err;
+
+ if ((err = i2c_detach_client(client))) {
+ dev_err(&client->dev, "Client deregistration failed, client not detached.\n");
+ return err;
+ }
+
+ kfree(i2c_get_clientdata(client));
+ return 0;
+}
+
+/* All registers are byte-sized */
+static int adm1021_read_value(struct i2c_client *client, u8 reg)
+{
+ return i2c_smbus_read_byte_data(client, reg);
+}
+
+static int adm1021_write_value(struct i2c_client *client, u8 reg, u16 value)
+{
+ if (!read_only)
+ return i2c_smbus_write_byte_data(client, reg, value);
+ return 0;
+}
+
+static struct adm1021_data *adm1021_update_device(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adm1021_data *data = i2c_get_clientdata(client);
+
+ down(&data->update_lock);
+
+ if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
+ || !data->valid) {
+ dev_dbg(&client->dev, "Starting adm1021 update\n");
+
+ data->temp_input = adm1021_read_value(client, ADM1021_REG_TEMP);
+ data->temp_max = adm1021_read_value(client, ADM1021_REG_TOS_R);
+ data->temp_hyst = adm1021_read_value(client, ADM1021_REG_THYST_R);
+ data->remote_temp_input = adm1021_read_value(client, ADM1021_REG_REMOTE_TEMP);
+ data->remote_temp_max = adm1021_read_value(client, ADM1021_REG_REMOTE_TOS_R);
+ data->remote_temp_hyst = adm1021_read_value(client, ADM1021_REG_REMOTE_THYST_R);
+ data->alarms = adm1021_read_value(client, ADM1021_REG_STATUS) & 0x7c;
+ if (data->type == adm1023) {
+ data->remote_temp_prec = adm1021_read_value(client, ADM1021_REG_REM_TEMP_PREC);
+ data->remote_temp_os_prec = adm1021_read_value(client, ADM1021_REG_REM_TOS_PREC);
+ data->remote_temp_hyst_prec = adm1021_read_value(client, ADM1021_REG_REM_THYST_PREC);
+ data->remote_temp_offset = adm1021_read_value(client, ADM1021_REG_REM_OFFSET);
+ data->remote_temp_offset_prec = adm1021_read_value(client, ADM1021_REG_REM_OFFSET_PREC);
+ }
+ data->last_updated = jiffies;
+ data->valid = 1;
+ }
+
+ up(&data->update_lock);
+
+ return data;
+}
+
+static int __init sensors_adm1021_init(void)
+{
+ return i2c_add_driver(&adm1021_driver);
+}
+
+static void __exit sensors_adm1021_exit(void)
+{
+ i2c_del_driver(&adm1021_driver);
+}
+
+MODULE_AUTHOR ("Frodo Looijaard <frodol@dds.nl> and "
+ "Philip Edelbrock <phil@netroedge.com>");
+MODULE_DESCRIPTION("adm1021 driver");
+MODULE_LICENSE("GPL");
+
+module_param(read_only, bool, 0);
+MODULE_PARM_DESC(read_only, "Don't set any values, read only mode");
+
+module_init(sensors_adm1021_init)
+module_exit(sensors_adm1021_exit)
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-27 18:52:01 +0000