Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/i2c/chips/lm83.c b/drivers/i2c/chips/lm83.c
new file mode 100644
index 0000000..3dafe60
--- /dev/null
+++ b/drivers/i2c/chips/lm83.c
@@ -0,0 +1,412 @@
+/*
+ * lm83.c - Part of lm_sensors, Linux kernel modules for hardware
+ * monitoring
+ * Copyright (C) 2003 Jean Delvare <khali@linux-fr.org>
+ *
+ * Heavily inspired from the lm78, lm75 and adm1021 drivers. The LM83 is
+ * a sensor chip made by National Semiconductor. It reports up to four
+ * temperatures (its own plus up to three external ones) with a 1 deg
+ * resolution and a 3-4 deg accuracy. Complete datasheet can be obtained
+ * from National's website at:
+ * http://www.national.com/pf/LM/LM83.html
+ * Since the datasheet omits to give the chip stepping code, I give it
+ * here: 0x03 (at register 0xff).
+ *
+ * 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/config.h>
+#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
+ * Address is selected using 2 three-level pins, resulting in 9 possible
+ * addresses.
+ */
+
+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_1(lm83);
+
+/*
+ * The LM83 registers
+ * Manufacturer ID is 0x01 for National Semiconductor.
+ */
+
+#define LM83_REG_R_MAN_ID 0xFE
+#define LM83_REG_R_CHIP_ID 0xFF
+#define LM83_REG_R_CONFIG 0x03
+#define LM83_REG_W_CONFIG 0x09
+#define LM83_REG_R_STATUS1 0x02
+#define LM83_REG_R_STATUS2 0x35
+#define LM83_REG_R_LOCAL_TEMP 0x00
+#define LM83_REG_R_LOCAL_HIGH 0x05
+#define LM83_REG_W_LOCAL_HIGH 0x0B
+#define LM83_REG_R_REMOTE1_TEMP 0x30
+#define LM83_REG_R_REMOTE1_HIGH 0x38
+#define LM83_REG_W_REMOTE1_HIGH 0x50
+#define LM83_REG_R_REMOTE2_TEMP 0x01
+#define LM83_REG_R_REMOTE2_HIGH 0x07
+#define LM83_REG_W_REMOTE2_HIGH 0x0D
+#define LM83_REG_R_REMOTE3_TEMP 0x31
+#define LM83_REG_R_REMOTE3_HIGH 0x3A
+#define LM83_REG_W_REMOTE3_HIGH 0x52
+#define LM83_REG_R_TCRIT 0x42
+#define LM83_REG_W_TCRIT 0x5A
+
+/*
+ * Conversions and various macros
+ * The LM83 uses signed 8-bit values with LSB = 1 degree Celcius.
+ */
+
+#define TEMP_FROM_REG(val) ((val) * 1000)
+#define TEMP_TO_REG(val) ((val) <= -128000 ? -128 : \
+ (val) >= 127000 ? 127 : \
+ (val) < 0 ? ((val) - 500) / 1000 : \
+ ((val) + 500) / 1000)
+
+static const u8 LM83_REG_R_TEMP[] = {
+ LM83_REG_R_LOCAL_TEMP,
+ LM83_REG_R_REMOTE1_TEMP,
+ LM83_REG_R_REMOTE2_TEMP,
+ LM83_REG_R_REMOTE3_TEMP
+};
+
+static const u8 LM83_REG_R_HIGH[] = {
+ LM83_REG_R_LOCAL_HIGH,
+ LM83_REG_R_REMOTE1_HIGH,
+ LM83_REG_R_REMOTE2_HIGH,
+ LM83_REG_R_REMOTE3_HIGH
+};
+
+static const u8 LM83_REG_W_HIGH[] = {
+ LM83_REG_W_LOCAL_HIGH,
+ LM83_REG_W_REMOTE1_HIGH,
+ LM83_REG_W_REMOTE2_HIGH,
+ LM83_REG_W_REMOTE3_HIGH
+};
+
+/*
+ * Functions declaration
+ */
+
+static int lm83_attach_adapter(struct i2c_adapter *adapter);
+static int lm83_detect(struct i2c_adapter *adapter, int address, int kind);
+static int lm83_detach_client(struct i2c_client *client);
+static struct lm83_data *lm83_update_device(struct device *dev);
+
+/*
+ * Driver data (common to all clients)
+ */
+
+static struct i2c_driver lm83_driver = {
+ .owner = THIS_MODULE,
+ .name = "lm83",
+ .id = I2C_DRIVERID_LM83,
+ .flags = I2C_DF_NOTIFY,
+ .attach_adapter = lm83_attach_adapter,
+ .detach_client = lm83_detach_client,
+};
+
+/*
+ * Client data (each client gets its own)
+ */
+
+struct lm83_data {
+ struct i2c_client client;
+ struct semaphore update_lock;
+ char valid; /* zero until following fields are valid */
+ unsigned long last_updated; /* in jiffies */
+
+ /* registers values */
+ s8 temp_input[4];
+ s8 temp_high[4];
+ s8 temp_crit;
+ u16 alarms; /* bitvector, combined */
+};
+
+/*
+ * Sysfs stuff
+ */
+
+#define show_temp(suffix, value) \
+static ssize_t show_temp_##suffix(struct device *dev, char *buf) \
+{ \
+ struct lm83_data *data = lm83_update_device(dev); \
+ return sprintf(buf, "%d\n", TEMP_FROM_REG(data->value)); \
+}
+show_temp(input1, temp_input[0]);
+show_temp(input2, temp_input[1]);
+show_temp(input3, temp_input[2]);
+show_temp(input4, temp_input[3]);
+show_temp(high1, temp_high[0]);
+show_temp(high2, temp_high[1]);
+show_temp(high3, temp_high[2]);
+show_temp(high4, temp_high[3]);
+show_temp(crit, temp_crit);
+
+#define set_temp(suffix, value, reg) \
+static ssize_t set_temp_##suffix(struct device *dev, const char *buf, \
+ size_t count) \
+{ \
+ struct i2c_client *client = to_i2c_client(dev); \
+ struct lm83_data *data = i2c_get_clientdata(client); \
+ long val = simple_strtol(buf, NULL, 10); \
+ \
+ down(&data->update_lock); \
+ data->value = TEMP_TO_REG(val); \
+ i2c_smbus_write_byte_data(client, reg, data->value); \
+ up(&data->update_lock); \
+ return count; \
+}
+set_temp(high1, temp_high[0], LM83_REG_W_LOCAL_HIGH);
+set_temp(high2, temp_high[1], LM83_REG_W_REMOTE1_HIGH);
+set_temp(high3, temp_high[2], LM83_REG_W_REMOTE2_HIGH);
+set_temp(high4, temp_high[3], LM83_REG_W_REMOTE3_HIGH);
+set_temp(crit, temp_crit, LM83_REG_W_TCRIT);
+
+static ssize_t show_alarms(struct device *dev, char *buf)
+{
+ struct lm83_data *data = lm83_update_device(dev);
+ return sprintf(buf, "%d\n", data->alarms);
+}
+
+static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
+static DEVICE_ATTR(temp2_input, S_IRUGO, show_temp_input2, NULL);
+static DEVICE_ATTR(temp3_input, S_IRUGO, show_temp_input3, NULL);
+static DEVICE_ATTR(temp4_input, S_IRUGO, show_temp_input4, NULL);
+static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_high1,
+ set_temp_high1);
+static DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_high2,
+ set_temp_high2);
+static DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_high3,
+ set_temp_high3);
+static DEVICE_ATTR(temp4_max, S_IWUSR | S_IRUGO, show_temp_high4,
+ set_temp_high4);
+static DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit, NULL);
+static DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit, NULL);
+static DEVICE_ATTR(temp3_crit, S_IWUSR | S_IRUGO, show_temp_crit,
+ set_temp_crit);
+static DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp_crit, NULL);
+static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
+
+/*
+ * Real code
+ */
+
+static int lm83_attach_adapter(struct i2c_adapter *adapter)
+{
+ if (!(adapter->class & I2C_CLASS_HWMON))
+ return 0;
+ return i2c_detect(adapter, &addr_data, lm83_detect);
+}
+
+/*
+ * The following function does more than just detection. If detection
+ * succeeds, it also registers the new chip.
+ */
+static int lm83_detect(struct i2c_adapter *adapter, int address, int kind)
+{
+ struct i2c_client *new_client;
+ struct lm83_data *data;
+ int err = 0;
+ const char *name = "";
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ goto exit;
+
+ if (!(data = kmalloc(sizeof(struct lm83_data), GFP_KERNEL))) {
+ err = -ENOMEM;
+ goto exit;
+ }
+ memset(data, 0, sizeof(struct lm83_data));
+
+ /* The common I2C client data is placed right after the
+ * LM83-specific data. */
+ new_client = &data->client;
+ i2c_set_clientdata(new_client, data);
+ new_client->addr = address;
+ new_client->adapter = adapter;
+ new_client->driver = &lm83_driver;
+ new_client->flags = 0;
+
+ /* Now we do the detection and identification. A negative kind
+ * means that the driver was loaded with no force parameter
+ * (default), so we must both detect and identify the chip
+ * (actually there is only one possible kind of chip for now, LM83).
+ * A zero kind means that the driver was loaded with the force
+ * parameter, the detection step shall be skipped. A positive kind
+ * means that the driver was loaded with the force parameter and a
+ * given kind of chip is requested, so both the detection and the
+ * identification steps are skipped. */
+
+ /* Default to an LM83 if forced */
+ if (kind == 0)
+ kind = lm83;
+
+ if (kind < 0) { /* detection */
+ if (((i2c_smbus_read_byte_data(new_client, LM83_REG_R_STATUS1)
+ & 0xA8) != 0x00) ||
+ ((i2c_smbus_read_byte_data(new_client, LM83_REG_R_STATUS2)
+ & 0x48) != 0x00) ||
+ ((i2c_smbus_read_byte_data(new_client, LM83_REG_R_CONFIG)
+ & 0x41) != 0x00)) {
+ dev_dbg(&adapter->dev,
+ "LM83 detection failed at 0x%02x.\n", address);
+ goto exit_free;
+ }
+ }
+
+ if (kind <= 0) { /* identification */
+ u8 man_id, chip_id;
+
+ man_id = i2c_smbus_read_byte_data(new_client,
+ LM83_REG_R_MAN_ID);
+ chip_id = i2c_smbus_read_byte_data(new_client,
+ LM83_REG_R_CHIP_ID);
+
+ if (man_id == 0x01) { /* National Semiconductor */
+ if (chip_id == 0x03) {
+ kind = lm83;
+ }
+ }
+
+ if (kind <= 0) { /* identification failed */
+ dev_info(&adapter->dev,
+ "Unsupported chip (man_id=0x%02X, "
+ "chip_id=0x%02X).\n", man_id, chip_id);
+ goto exit_free;
+ }
+ }
+
+ if (kind == lm83) {
+ name = "lm83";
+ }
+
+ /* We can fill in the remaining client fields */
+ strlcpy(new_client->name, name, I2C_NAME_SIZE);
+ 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 exit_free;
+
+ /*
+ * Initialize the LM83 chip
+ * (Nothing to do for this one.)
+ */
+
+ /* Register sysfs hooks */
+ device_create_file(&new_client->dev, &dev_attr_temp1_input);
+ device_create_file(&new_client->dev, &dev_attr_temp2_input);
+ device_create_file(&new_client->dev, &dev_attr_temp3_input);
+ device_create_file(&new_client->dev, &dev_attr_temp4_input);
+ device_create_file(&new_client->dev, &dev_attr_temp1_max);
+ device_create_file(&new_client->dev, &dev_attr_temp2_max);
+ device_create_file(&new_client->dev, &dev_attr_temp3_max);
+ device_create_file(&new_client->dev, &dev_attr_temp4_max);
+ device_create_file(&new_client->dev, &dev_attr_temp1_crit);
+ device_create_file(&new_client->dev, &dev_attr_temp2_crit);
+ device_create_file(&new_client->dev, &dev_attr_temp3_crit);
+ device_create_file(&new_client->dev, &dev_attr_temp4_crit);
+ device_create_file(&new_client->dev, &dev_attr_alarms);
+
+ return 0;
+
+exit_free:
+ kfree(data);
+exit:
+ return err;
+}
+
+static int lm83_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;
+}
+
+static struct lm83_data *lm83_update_device(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct lm83_data *data = i2c_get_clientdata(client);
+
+ down(&data->update_lock);
+
+ if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) {
+ int nr;
+
+ dev_dbg(&client->dev, "Updating lm83 data.\n");
+ for (nr = 0; nr < 4 ; nr++) {
+ data->temp_input[nr] =
+ i2c_smbus_read_byte_data(client,
+ LM83_REG_R_TEMP[nr]);
+ data->temp_high[nr] =
+ i2c_smbus_read_byte_data(client,
+ LM83_REG_R_HIGH[nr]);
+ }
+ data->temp_crit =
+ i2c_smbus_read_byte_data(client, LM83_REG_R_TCRIT);
+ data->alarms =
+ i2c_smbus_read_byte_data(client, LM83_REG_R_STATUS1)
+ + (i2c_smbus_read_byte_data(client, LM83_REG_R_STATUS2)
+ << 8);
+
+ data->last_updated = jiffies;
+ data->valid = 1;
+ }
+
+ up(&data->update_lock);
+
+ return data;
+}
+
+static int __init sensors_lm83_init(void)
+{
+ return i2c_add_driver(&lm83_driver);
+}
+
+static void __exit sensors_lm83_exit(void)
+{
+ i2c_del_driver(&lm83_driver);
+}
+
+MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
+MODULE_DESCRIPTION("LM83 driver");
+MODULE_LICENSE("GPL");
+
+module_init(sensors_lm83_init);
+module_exit(sensors_lm83_exit);