diff options
| -rw-r--r-- | drivers/hwmon/asus_atk0110.c | 158 |
1 files changed, 102 insertions, 56 deletions
diff --git a/drivers/hwmon/asus_atk0110.c b/drivers/hwmon/asus_atk0110.c index fe4fa29c921..19f3fd32e10 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, ¶ms, &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, ¶ms, &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, ¶ms, - &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; } |