/*
* lm90.c - Part of lm_sensors, Linux kernel modules for hardware
* monitoring
- * Copyright (C) 2003-2008 Jean Delvare <khali@linux-fr.org>
+ * Copyright (C) 2003-2010 Jean Delvare <khali@linux-fr.org>
*
* Based on the lm83 driver. The LM90 is a sensor chip made by National
* Semiconductor. It reports up to two temperatures (its own plus up to
static const unsigned short normal_i2c[] = {
0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e, I2C_CLIENT_END };
-/*
- * Insmod parameters
- */
-
-I2C_CLIENT_INSMOD_8(lm90, adm1032, lm99, lm86, max6657, adt7461, max6680,
- max6646);
+enum chips { lm90, adm1032, lm99, lm86, max6657, adt7461, max6680, max6646,
+ w83l771 };
/*
* The LM90 registers
* Functions declaration
*/
-static int lm90_detect(struct i2c_client *client, int kind,
- struct i2c_board_info *info);
+static int lm90_detect(struct i2c_client *client, struct i2c_board_info *info);
static int lm90_probe(struct i2c_client *client,
const struct i2c_device_id *id);
static void lm90_init_client(struct i2c_client *client);
+static void lm90_alert(struct i2c_client *client, unsigned int flag);
static int lm90_remove(struct i2c_client *client);
static struct lm90_data *lm90_update_device(struct device *dev);
{ "max6659", max6657 },
{ "max6680", max6680 },
{ "max6681", max6680 },
+ { "w83l771", w83l771 },
{ }
};
MODULE_DEVICE_TABLE(i2c, lm90_id);
},
.probe = lm90_probe,
.remove = lm90_remove,
+ .alert = lm90_alert,
.id_table = lm90_id,
.detect = lm90_detect,
- .address_data = &addr_data,
+ .address_list = normal_i2c,
};
/*
int kind;
int flags;
+ u8 config_orig; /* Original configuration register value */
+ u8 alert_alarms; /* Which alarm bits trigger ALERT# */
+
/* registers values */
s8 temp8[4]; /* 0: local low limit
1: local high limit
}
/* Return 0 if detection is successful, -ENODEV otherwise */
-static int lm90_detect(struct i2c_client *new_client, int kind,
+static int lm90_detect(struct i2c_client *new_client,
struct i2c_board_info *info)
{
struct i2c_adapter *adapter = new_client->adapter;
int address = new_client->addr;
- const char *name = "";
+ const char *name = NULL;
+ int man_id, chip_id, reg_config1, reg_convrate;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
- /*
- * Now we do the remaining detection. A negative kind means that
- * the driver was loaded with no force parameter (default), so we
- * must both detect and identify the chip. 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 LM90 if forced */
- if (kind == 0)
- kind = lm90;
-
- if (kind < 0) { /* detection and identification */
- int man_id, chip_id, reg_config1, reg_convrate;
-
- if ((man_id = i2c_smbus_read_byte_data(new_client,
+ /* detection and identification */
+ if ((man_id = i2c_smbus_read_byte_data(new_client,
LM90_REG_R_MAN_ID)) < 0
- || (chip_id = i2c_smbus_read_byte_data(new_client,
+ || (chip_id = i2c_smbus_read_byte_data(new_client,
LM90_REG_R_CHIP_ID)) < 0
- || (reg_config1 = i2c_smbus_read_byte_data(new_client,
+ || (reg_config1 = i2c_smbus_read_byte_data(new_client,
LM90_REG_R_CONFIG1)) < 0
- || (reg_convrate = i2c_smbus_read_byte_data(new_client,
+ || (reg_convrate = i2c_smbus_read_byte_data(new_client,
LM90_REG_R_CONVRATE)) < 0)
+ return -ENODEV;
+
+ if ((address == 0x4C || address == 0x4D)
+ && man_id == 0x01) { /* National Semiconductor */
+ int reg_config2;
+
+ reg_config2 = i2c_smbus_read_byte_data(new_client,
+ LM90_REG_R_CONFIG2);
+ if (reg_config2 < 0)
return -ENODEV;
-
- if ((address == 0x4C || address == 0x4D)
- && man_id == 0x01) { /* National Semiconductor */
- int reg_config2;
-
- if ((reg_config2 = i2c_smbus_read_byte_data(new_client,
- LM90_REG_R_CONFIG2)) < 0)
- return -ENODEV;
-
- if ((reg_config1 & 0x2A) == 0x00
- && (reg_config2 & 0xF8) == 0x00
- && reg_convrate <= 0x09) {
- if (address == 0x4C
- && (chip_id & 0xF0) == 0x20) { /* LM90 */
- kind = lm90;
- } else
- if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */
- kind = lm99;
- dev_info(&adapter->dev,
- "Assuming LM99 chip at "
- "0x%02x\n", address);
- dev_info(&adapter->dev,
- "If it is an LM89, pass "
- "force_lm86=%d,0x%02x when "
- "loading the lm90 driver\n",
- i2c_adapter_id(adapter),
- address);
- } else
- if (address == 0x4C
- && (chip_id & 0xF0) == 0x10) { /* LM86 */
- kind = lm86;
- }
- }
- } else
- if ((address == 0x4C || address == 0x4D)
- && man_id == 0x41) { /* Analog Devices */
- if ((chip_id & 0xF0) == 0x40 /* ADM1032 */
- && (reg_config1 & 0x3F) == 0x00
- && reg_convrate <= 0x0A) {
- kind = adm1032;
- } else
- if (chip_id == 0x51 /* ADT7461 */
- && (reg_config1 & 0x1B) == 0x00
- && reg_convrate <= 0x0A) {
- kind = adt7461;
- }
- } else
- if (man_id == 0x4D) { /* Maxim */
- /*
- * The MAX6657, MAX6658 and MAX6659 do NOT have a
- * chip_id register. Reading from that address will
- * return the last read value, which in our case is
- * those of the man_id register. Likewise, the config1
- * register seems to lack a low nibble, so the value
- * will be those of the previous read, so in our case
- * those of the man_id register.
- */
- if (chip_id == man_id
- && (address == 0x4C || address == 0x4D)
- && (reg_config1 & 0x1F) == (man_id & 0x0F)
- && reg_convrate <= 0x09) {
- kind = max6657;
+
+ if ((reg_config1 & 0x2A) == 0x00
+ && (reg_config2 & 0xF8) == 0x00
+ && reg_convrate <= 0x09) {
+ if (address == 0x4C
+ && (chip_id & 0xF0) == 0x20) { /* LM90 */
+ name = "lm90";
} else
- /* The chip_id register of the MAX6680 and MAX6681
- * holds the revision of the chip.
- * the lowest bit of the config1 register is unused
- * and should return zero when read, so should the
- * second to last bit of config1 (software reset)
- */
- if (chip_id == 0x01
- && (reg_config1 & 0x03) == 0x00
- && reg_convrate <= 0x07) {
- kind = max6680;
+ if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */
+ name = "lm99";
+ dev_info(&adapter->dev,
+ "Assuming LM99 chip at 0x%02x\n",
+ address);
+ dev_info(&adapter->dev,
+ "If it is an LM89, instantiate it "
+ "with the new_device sysfs "
+ "interface\n");
} else
- /* The chip_id register of the MAX6646/6647/6649
- * holds the revision of the chip.
- * The lowest 6 bits of the config1 register are
- * unused and should return zero when read.
- */
- if (chip_id == 0x59
- && (reg_config1 & 0x3f) == 0x00
- && reg_convrate <= 0x07) {
- kind = max6646;
+ if (address == 0x4C
+ && (chip_id & 0xF0) == 0x10) { /* LM86 */
+ name = "lm86";
}
}
-
- if (kind <= 0) { /* identification failed */
- dev_dbg(&adapter->dev,
- "Unsupported chip at 0x%02x (man_id=0x%02X, "
- "chip_id=0x%02X)\n", address, man_id, chip_id);
- return -ENODEV;
+ } else
+ if ((address == 0x4C || address == 0x4D)
+ && man_id == 0x41) { /* Analog Devices */
+ if ((chip_id & 0xF0) == 0x40 /* ADM1032 */
+ && (reg_config1 & 0x3F) == 0x00
+ && reg_convrate <= 0x0A) {
+ name = "adm1032";
+ /* The ADM1032 supports PEC, but only if combined
+ transactions are not used. */
+ if (i2c_check_functionality(adapter,
+ I2C_FUNC_SMBUS_BYTE))
+ info->flags |= I2C_CLIENT_PEC;
+ } else
+ if (chip_id == 0x51 /* ADT7461 */
+ && (reg_config1 & 0x1B) == 0x00
+ && reg_convrate <= 0x0A) {
+ name = "adt7461";
+ }
+ } else
+ if (man_id == 0x4D) { /* Maxim */
+ /*
+ * The MAX6657, MAX6658 and MAX6659 do NOT have a chip_id
+ * register. Reading from that address will return the last
+ * read value, which in our case is those of the man_id
+ * register. Likewise, the config1 register seems to lack a
+ * low nibble, so the value will be those of the previous
+ * read, so in our case those of the man_id register.
+ */
+ if (chip_id == man_id
+ && (address == 0x4C || address == 0x4D)
+ && (reg_config1 & 0x1F) == (man_id & 0x0F)
+ && reg_convrate <= 0x09) {
+ name = "max6657";
+ } else
+ /*
+ * The chip_id register of the MAX6680 and MAX6681 holds the
+ * revision of the chip. The lowest bit of the config1 register
+ * is unused and should return zero when read, so should the
+ * second to last bit of config1 (software reset).
+ */
+ if (chip_id == 0x01
+ && (reg_config1 & 0x03) == 0x00
+ && reg_convrate <= 0x07) {
+ name = "max6680";
+ } else
+ /*
+ * The chip_id register of the MAX6646/6647/6649 holds the
+ * revision of the chip. The lowest 6 bits of the config1
+ * register are unused and should return zero when read.
+ */
+ if (chip_id == 0x59
+ && (reg_config1 & 0x3f) == 0x00
+ && reg_convrate <= 0x07) {
+ name = "max6646";
+ }
+ } else
+ if (address == 0x4C
+ && man_id == 0x5C) { /* Winbond/Nuvoton */
+ if ((chip_id & 0xFE) == 0x10 /* W83L771AWG/ASG */
+ && (reg_config1 & 0x2A) == 0x00
+ && reg_convrate <= 0x08) {
+ name = "w83l771";
}
}
- /* Fill the i2c board info */
- if (kind == lm90) {
- name = "lm90";
- } else if (kind == adm1032) {
- name = "adm1032";
- /* The ADM1032 supports PEC, but only if combined
- transactions are not used. */
- if (i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
- info->flags |= I2C_CLIENT_PEC;
- } else if (kind == lm99) {
- name = "lm99";
- } else if (kind == lm86) {
- name = "lm86";
- } else if (kind == max6657) {
- name = "max6657";
- } else if (kind == max6680) {
- name = "max6680";
- } else if (kind == adt7461) {
- name = "adt7461";
- } else if (kind == max6646) {
- name = "max6646";
+ if (!name) { /* identification failed */
+ dev_dbg(&adapter->dev,
+ "Unsupported chip at 0x%02x (man_id=0x%02X, "
+ "chip_id=0x%02X)\n", address, man_id, chip_id);
+ return -ENODEV;
}
+
strlcpy(info->type, name, I2C_NAME_SIZE);
return 0;
new_client->flags &= ~I2C_CLIENT_PEC;
}
+ /* Different devices have different alarm bits triggering the
+ * ALERT# output */
+ switch (data->kind) {
+ case lm90:
+ case lm99:
+ case lm86:
+ data->alert_alarms = 0x7b;
+ break;
+ default:
+ data->alert_alarms = 0x7c;
+ break;
+ }
+
/* Initialize the LM90 chip */
lm90_init_client(new_client);
static void lm90_init_client(struct i2c_client *client)
{
- u8 config, config_orig;
+ u8 config;
struct lm90_data *data = i2c_get_clientdata(client);
/*
dev_warn(&client->dev, "Initialization failed!\n");
return;
}
- config_orig = config;
+ data->config_orig = config;
/* Check Temperature Range Select */
if (data->kind == adt7461) {
}
config &= 0xBF; /* run */
- if (config != config_orig) /* Only write if changed */
+ if (config != data->config_orig) /* Only write if changed */
i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, config);
}
device_remove_file(&client->dev,
&sensor_dev_attr_temp2_offset.dev_attr);
+ /* Restore initial configuration */
+ i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
+ data->config_orig);
+
kfree(data);
return 0;
}
+static void lm90_alert(struct i2c_client *client, unsigned int flag)
+{
+ struct lm90_data *data = i2c_get_clientdata(client);
+ u8 config, alarms;
+
+ lm90_read_reg(client, LM90_REG_R_STATUS, &alarms);
+ if ((alarms & 0x7f) == 0) {
+ dev_info(&client->dev, "Everything OK\n");
+ } else {
+ if (alarms & 0x61)
+ dev_warn(&client->dev,
+ "temp%d out of range, please check!\n", 1);
+ if (alarms & 0x1a)
+ dev_warn(&client->dev,
+ "temp%d out of range, please check!\n", 2);
+ if (alarms & 0x04)
+ dev_warn(&client->dev,
+ "temp%d diode open, please check!\n", 2);
+
+ /* Disable ALERT# output, because these chips don't implement
+ SMBus alert correctly; they should only hold the alert line
+ low briefly. */
+ if ((data->kind == adm1032 || data->kind == adt7461)
+ && (alarms & data->alert_alarms)) {
+ dev_dbg(&client->dev, "Disabling ALERT#\n");
+ lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
+ i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
+ config | 0x80);
+ }
+ }
+}
+
static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl, u16 *value)
{
int err;
}
lm90_read_reg(client, LM90_REG_R_STATUS, &data->alarms);
+ /* Re-enable ALERT# output if it was originally enabled and
+ * relevant alarms are all clear */
+ if ((data->config_orig & 0x80) == 0
+ && (data->alarms & data->alert_alarms) == 0) {
+ u8 config;
+
+ lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
+ if (config & 0x80) {
+ dev_dbg(&client->dev, "Re-enabling ALERT#\n");
+ i2c_smbus_write_byte_data(client,
+ LM90_REG_W_CONFIG1,
+ config & ~0x80);
+ }
+ }
+
data->last_updated = jiffies;
data->valid = 1;
}
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