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-rw-r--r--drivers/hwmon/asus_atk0110.c158
1 files changed, 102 insertions, 56 deletions
diff --git a/drivers/hwmon/asus_atk0110.c b/drivers/hwmon/asus_atk0110.c
index fe4fa29..19f3fd3 100644
--- a/drivers/hwmon/asus_atk0110.c
+++ b/drivers/hwmon/asus_atk0110.c
@@ -129,9 +129,22 @@ struct atk_sensor_data {
char const *acpi_name;
};
-struct atk_acpi_buffer_u64 {
- union acpi_object buf;
- u64 value;
+/* Return buffer format:
+ * [0-3] "value" is valid flag
+ * [4-7] value
+ * [8- ] unknown stuff on newer mobos
+ */
+struct atk_acpi_ret_buffer {
+ u32 flags;
+ u32 value;
+ u8 data[];
+};
+
+/* Input buffer used for GITM and SITM methods */
+struct atk_acpi_input_buf {
+ u32 id;
+ u32 param1;
+ u32 param2;
};
static int atk_add(struct acpi_device *device);
@@ -439,52 +452,110 @@ static int atk_read_value_old(struct atk_sensor_data *sensor, u64 *value)
return 0;
}
-static int atk_read_value_new(struct atk_sensor_data *sensor, u64 *value)
+static union acpi_object *atk_ggrp(struct atk_data *data, u16 mux)
{
- struct atk_data *data = sensor->data;
struct device *dev = &data->acpi_dev->dev;
+ struct acpi_buffer buf;
+ acpi_status ret;
struct acpi_object_list params;
- struct acpi_buffer ret;
union acpi_object id;
- struct atk_acpi_buffer_u64 tmp;
- acpi_status status;
+ union acpi_object *pack;
id.type = ACPI_TYPE_INTEGER;
- id.integer.value = sensor->id;
-
+ id.integer.value = mux;
params.count = 1;
params.pointer = &id;
- tmp.buf.type = ACPI_TYPE_BUFFER;
- tmp.buf.buffer.pointer = (u8 *)&tmp.value;
- tmp.buf.buffer.length = sizeof(u64);
- ret.length = sizeof(tmp);
- ret.pointer = &tmp;
+ buf.length = ACPI_ALLOCATE_BUFFER;
+ ret = acpi_evaluate_object(data->enumerate_handle, NULL, &params, &buf);
+ if (ret != AE_OK) {
+ dev_err(dev, "GGRP[%#x] ACPI exception: %s\n", mux,
+ acpi_format_exception(ret));
+ return ERR_PTR(-EIO);
+ }
+ pack = buf.pointer;
+ if (pack->type != ACPI_TYPE_PACKAGE) {
+ /* Execution was successful, but the id was not found */
+ ACPI_FREE(pack);
+ return ERR_PTR(-ENOENT);
+ }
+ if (pack->package.count < 1) {
+ dev_err(dev, "GGRP[%#x] package is too small\n", mux);
+ ACPI_FREE(pack);
+ return ERR_PTR(-EIO);
+ }
+ return pack;
+}
+
+static union acpi_object *atk_gitm(struct atk_data *data, u64 id)
+{
+ struct device *dev = &data->acpi_dev->dev;
+ struct atk_acpi_input_buf buf;
+ union acpi_object tmp;
+ struct acpi_object_list params;
+ struct acpi_buffer ret;
+ union acpi_object *obj;
+ acpi_status status;
+
+ buf.id = id;
+ buf.param1 = 0;
+ buf.param2 = 0;
+
+ tmp.type = ACPI_TYPE_BUFFER;
+ tmp.buffer.pointer = (u8 *)&buf;
+ tmp.buffer.length = sizeof(buf);
+
+ params.count = 1;
+ params.pointer = (void *)&tmp;
+
+ ret.length = ACPI_ALLOCATE_BUFFER;
status = acpi_evaluate_object_typed(data->read_handle, NULL, &params,
&ret, ACPI_TYPE_BUFFER);
if (status != AE_OK) {
- dev_warn(dev, "%s: ACPI exception: %s\n", __func__,
+ dev_warn(dev, "GITM[%#llx] ACPI exception: %s\n", id,
acpi_format_exception(status));
- return -EIO;
+ return ERR_PTR(-EIO);
+ }
+ obj = ret.pointer;
+
+ /* Sanity check */
+ if (obj->buffer.length < 8) {
+ dev_warn(dev, "Unexpected ASBF length: %u\n",
+ obj->buffer.length);
+ ACPI_FREE(obj);
+ return ERR_PTR(-EIO);
}
+ return obj;
+}
- /* Return buffer format:
- * [0-3] "value" is valid flag
- * [4-7] value
- */
- if (!(tmp.value & 0xffffffff)) {
+static int atk_read_value_new(struct atk_sensor_data *sensor, u64 *value)
+{
+ struct atk_data *data = sensor->data;
+ struct device *dev = &data->acpi_dev->dev;
+ union acpi_object *obj;
+ struct atk_acpi_ret_buffer *buf;
+ int err = 0;
+
+ obj = atk_gitm(data, sensor->id);
+ if (IS_ERR(obj))
+ return PTR_ERR(obj);
+
+ buf = (struct atk_acpi_ret_buffer *)obj->buffer.pointer;
+ if (buf->flags == 0) {
/* The reading is not valid, possible causes:
* - sensor failure
* - enumeration was FUBAR (and we didn't notice)
*/
- dev_info(dev, "Failure: %#llx\n", tmp.value);
- return -EIO;
+ dev_warn(dev, "Read failed, sensor = %#llx\n", sensor->id);
+ err = -EIO;
+ goto out;
}
- *value = (tmp.value & 0xffffffff00000000ULL) >> 32;
-
- return 0;
+ *value = buf->value;
+out:
+ ACPI_FREE(obj);
+ return err;
}
static int atk_read_value(struct atk_sensor_data *sensor, u64 *value)
@@ -716,39 +787,15 @@ cleanup:
static int atk_enumerate_new_hwmon(struct atk_data *data)
{
struct device *dev = &data->acpi_dev->dev;
- struct acpi_buffer buf;
- acpi_status ret;
- struct acpi_object_list params;
- union acpi_object id;
union acpi_object *pack;
int err;
int i;
dev_dbg(dev, "Enumerating hwmon sensors\n");
- id.type = ACPI_TYPE_INTEGER;
- id.integer.value = ATK_MUX_HWMON;
- params.count = 1;
- params.pointer = &id;
-
- buf.length = ACPI_ALLOCATE_BUFFER;
- ret = acpi_evaluate_object_typed(data->enumerate_handle, NULL, &params,
- &buf, ACPI_TYPE_PACKAGE);
- if (ret != AE_OK) {
- dev_warn(dev, METHOD_ENUMERATE ": ACPI exception: %s\n",
- acpi_format_exception(ret));
- return -ENODEV;
- }
-
- /* Result must be a package */
- pack = buf.pointer;
-
- if (pack->package.count < 1) {
- dev_dbg(dev, "%s: hwmon package is too small: %d\n", __func__,
- pack->package.count);
- err = -EINVAL;
- goto out;
- }
+ pack = atk_ggrp(data, ATK_MUX_HWMON);
+ if (IS_ERR(pack))
+ return PTR_ERR(pack);
for (i = 0; i < pack->package.count; i++) {
union acpi_object *obj = &pack->package.elements[i];
@@ -758,8 +805,7 @@ static int atk_enumerate_new_hwmon(struct atk_data *data)
err = data->voltage_count + data->temperature_count + data->fan_count;
-out:
- ACPI_FREE(buf.pointer);
+ ACPI_FREE(pack);
return err;
}
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