#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
+#include <linux/dmi.h>
/* Addresses to scan */
-static unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
+static const unsigned short normal_i2c[] = { 0x73, I2C_CLIENT_END };
/* Insmod parameters */
I2C_CLIENT_INSMOD_5(fscpos, fscher, fscscy, fschrc, fschmd);
{ 0x71, 0x81, 0x91 }, /* her */
{ 0x71, 0xd1, 0x81, 0x91 }, /* scy */
{ 0x71, 0x81, 0x91 }, /* hrc */
- { 0x71, 0x81, 0x91, 0xd1, 0xe1 }, /* hmd */
+ { 0x71, 0x81, 0x91, 0xd1, 0xe1 }, /* hmd */
};
/* temperature high limit registers, FSC does not document these. Proven to be
{ 0x76, 0x86, 0x96 }, /* her */
{ 0x76, 0xd6, 0x86, 0x96 }, /* scy */
{ 0x76, 0x86, 0x96 }, /* hrc */
- { 0x76, 0x86, 0x96, 0xd6, 0xe6 }, /* hmd */
+ { 0x76, 0x86, 0x96, 0xd6, 0xe6 }, /* hmd */
};
/* These were found through experimenting with an fscher, currently they are
* Functions declarations
*/
-static int fschmd_attach_adapter(struct i2c_adapter *adapter);
-static int fschmd_detach_client(struct i2c_client *client);
+static int fschmd_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int fschmd_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info);
+static int fschmd_remove(struct i2c_client *client);
static struct fschmd_data *fschmd_update_device(struct device *dev);
/*
* Driver data (common to all clients)
*/
+static const struct i2c_device_id fschmd_id[] = {
+ { "fscpos", fscpos },
+ { "fscher", fscher },
+ { "fscscy", fscscy },
+ { "fschrc", fschrc },
+ { "fschmd", fschmd },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, fschmd_id);
+
static struct i2c_driver fschmd_driver = {
+ .class = I2C_CLASS_HWMON,
.driver = {
.name = FSCHMD_NAME,
},
- .attach_adapter = fschmd_attach_adapter,
- .detach_client = fschmd_detach_client,
+ .probe = fschmd_probe,
+ .remove = fschmd_remove,
+ .id_table = fschmd_id,
+ .detect = fschmd_detect,
+ .address_data = &addr_data,
};
/*
*/
struct fschmd_data {
- struct i2c_client client;
struct device *hwmon_dev;
struct mutex update_lock;
int kind;
u8 fan_ripple[6]; /* divider for rps */
};
+/* Global variables to hold information read from special DMI tables, which are
+ available on FSC machines with an fscher or later chip. */
+static int dmi_mult[3] = { 490, 200, 100 };
+static int dmi_offset[3] = { 0, 0, 0 };
+static int dmi_vref = -1;
+
+
/*
* Sysfs attr show / store functions
*/
int index = to_sensor_dev_attr(devattr)->index;
struct fschmd_data *data = fschmd_update_device(dev);
- return sprintf(buf, "%d\n", (data->volt[index] *
- max_reading[index] + 128) / 255);
+ /* fscher / fschrc - 1 as data->kind is an array index, not a chips */
+ if (data->kind == (fscher - 1) || data->kind >= (fschrc - 1))
+ return sprintf(buf, "%d\n", (data->volt[index] * dmi_vref *
+ dmi_mult[index]) / 255 + dmi_offset[index]);
+ else
+ return sprintf(buf, "%d\n", (data->volt[index] *
+ max_reading[index] + 128) / 255);
}
v = SENSORS_LIMIT(v, -128, 127) + 128;
mutex_lock(&data->update_lock);
- i2c_smbus_write_byte_data(&data->client,
+ i2c_smbus_write_byte_data(to_i2c_client(dev),
FSCHMD_REG_TEMP_LIMIT[data->kind][index], v);
data->temp_max[index] = v;
mutex_unlock(&data->update_lock);
mutex_lock(&data->update_lock);
- reg = i2c_smbus_read_byte_data(&data->client,
+ reg = i2c_smbus_read_byte_data(to_i2c_client(dev),
FSCHMD_REG_FAN_RIPPLE[data->kind][index]);
/* bits 2..7 reserved => mask with 0x03 */
reg &= ~0x03;
reg |= v;
- i2c_smbus_write_byte_data(&data->client,
+ i2c_smbus_write_byte_data(to_i2c_client(dev),
FSCHMD_REG_FAN_RIPPLE[data->kind][index], reg);
data->fan_ripple[index] = reg;
mutex_lock(&data->update_lock);
- i2c_smbus_write_byte_data(&data->client,
+ i2c_smbus_write_byte_data(to_i2c_client(dev),
FSCHMD_REG_FAN_MIN[data->kind][index], v);
data->fan_min[index] = v;
mutex_lock(&data->update_lock);
- reg = i2c_smbus_read_byte_data(&data->client, FSCHMD_REG_CONTROL);
+ reg = i2c_smbus_read_byte_data(to_i2c_client(dev), FSCHMD_REG_CONTROL);
if (v)
reg |= FSCHMD_CONTROL_ALERT_LED_MASK;
else
reg &= ~FSCHMD_CONTROL_ALERT_LED_MASK;
- i2c_smbus_write_byte_data(&data->client, FSCHMD_REG_CONTROL, reg);
+ i2c_smbus_write_byte_data(to_i2c_client(dev), FSCHMD_REG_CONTROL, reg);
data->global_control = reg;
* Real code
*/
-static int fschmd_detect(struct i2c_adapter *adapter, int address, int kind)
+/* DMI decode routine to read voltage scaling factors from special DMI tables,
+ which are available on FSC machines with an fscher or later chip. */
+static void fschmd_dmi_decode(const struct dmi_header *header)
{
- struct i2c_client *client;
- struct fschmd_data *data;
- u8 revision;
- const char * const names[5] = { "Poseidon", "Hermes", "Scylla",
- "Heracles", "Heimdall" };
+ int i, mult[3] = { 0 }, offset[3] = { 0 }, vref = 0, found = 0;
+
+ /* dmi code ugliness, we get passed the address of the contents of
+ a complete DMI record, but in the form of a dmi_header pointer, in
+ reality this address holds header->length bytes of which the header
+ are the first 4 bytes */
+ u8 *dmi_data = (u8 *)header;
+
+ /* We are looking for OEM-specific type 185 */
+ if (header->type != 185)
+ return;
+
+ /* we are looking for what Siemens calls "subtype" 19, the subtype
+ is stored in byte 5 of the dmi block */
+ if (header->length < 5 || dmi_data[4] != 19)
+ return;
+
+ /* After the subtype comes 1 unknown byte and then blocks of 5 bytes,
+ consisting of what Siemens calls an "Entity" number, followed by
+ 2 16-bit words in LSB first order */
+ for (i = 6; (i + 4) < header->length; i += 5) {
+ /* entity 1 - 3: voltage multiplier and offset */
+ if (dmi_data[i] >= 1 && dmi_data[i] <= 3) {
+ /* Our in sensors order and the DMI order differ */
+ const int shuffle[3] = { 1, 0, 2 };
+ int in = shuffle[dmi_data[i] - 1];
+
+ /* Check for twice the same entity */
+ if (found & (1 << in))
+ return;
+
+ mult[in] = dmi_data[i + 1] | (dmi_data[i + 2] << 8);
+ offset[in] = dmi_data[i + 3] | (dmi_data[i + 4] << 8);
+
+ found |= 1 << in;
+ }
+
+ /* entity 7: reference voltage */
+ if (dmi_data[i] == 7) {
+ /* Check for twice the same entity */
+ if (found & 0x08)
+ return;
+
+ vref = dmi_data[i + 1] | (dmi_data[i + 2] << 8);
+
+ found |= 0x08;
+ }
+ }
+
+ if (found == 0x0F) {
+ for (i = 0; i < 3; i++) {
+ dmi_mult[i] = mult[i] * 10;
+ dmi_offset[i] = offset[i] * 10;
+ }
+ dmi_vref = vref;
+ }
+}
+
+static int fschmd_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info)
+{
+ struct i2c_adapter *adapter = client->adapter;
const char * const client_names[5] = { "fscpos", "fscher", "fscscy",
"fschrc", "fschmd" };
- int i, err = 0;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
- return 0;
-
- /* 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 i2c_smbus_read_byte_data. */
- if (!(data = kzalloc(sizeof(struct fschmd_data), GFP_KERNEL)))
- return -ENOMEM;
-
- client = &data->client;
- i2c_set_clientdata(client, data);
- client->addr = address;
- client->adapter = adapter;
- client->driver = &fschmd_driver;
- mutex_init(&data->update_lock);
+ return -ENODEV;
/* Detect & Identify the chip */
if (kind <= 0) {
else if (!strcmp(id, "HMD"))
kind = fschmd;
else
- goto exit_free;
+ return -ENODEV;
}
+ strlcpy(info->type, client_names[kind - 1], I2C_NAME_SIZE);
+
+ return 0;
+}
+
+static int fschmd_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct fschmd_data *data;
+ u8 revision;
+ const char * const names[5] = { "Poseidon", "Hermes", "Scylla",
+ "Heracles", "Heimdall" };
+ int i, err;
+ enum chips kind = id->driver_data;
+
+ data = kzalloc(sizeof(struct fschmd_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ i2c_set_clientdata(client, data);
+ mutex_init(&data->update_lock);
+
if (kind == fscpos) {
/* The Poseidon has hardwired temp limits, fill these
in for the alarm resetting code */
data->temp_max[2] = 50 + 128;
}
+ /* Read the special DMI table for fscher and newer chips */
+ if (kind == fscher || kind >= fschrc) {
+ dmi_walk(fschmd_dmi_decode);
+ if (dmi_vref == -1) {
+ printk(KERN_WARNING FSCHMD_NAME
+ ": Couldn't get voltage scaling factors from "
+ "BIOS DMI table, using builtin defaults\n");
+ dmi_vref = 33;
+ }
+ }
+
/* i2c kind goes from 1-5, we want from 0-4 to address arrays */
data->kind = kind - 1;
- strlcpy(client->name, client_names[data->kind], I2C_NAME_SIZE);
-
- /* Tell the I2C layer a new client has arrived */
- if ((err = i2c_attach_client(client)))
- goto exit_free;
for (i = 0; i < ARRAY_SIZE(fschmd_attr); i++) {
err = device_create_file(&client->dev,
return 0;
exit_detach:
- fschmd_detach_client(client); /* will also free data for us */
- return err;
-
-exit_free:
- kfree(data);
+ fschmd_remove(client); /* will also free data for us */
return err;
}
-static int fschmd_attach_adapter(struct i2c_adapter *adapter)
-{
- if (!(adapter->class & I2C_CLASS_HWMON))
- return 0;
- return i2c_probe(adapter, &addr_data, fschmd_detect);
-}
-
-static int fschmd_detach_client(struct i2c_client *client)
+static int fschmd_remove(struct i2c_client *client)
{
struct fschmd_data *data = i2c_get_clientdata(client);
- int i, err;
+ int i;
/* Check if registered in case we're called from fschmd_detect
to cleanup after an error */
device_remove_file(&client->dev,
&fschmd_fan_attr[i].dev_attr);
- if ((err = i2c_detach_client(client)))
- return err;
-
kfree(data);
return 0;
}
git.openpandora.org / pandora-kernel.git / blobdiff