![Luca Tettamanti](/assets/img/avatar_default.png)
On newer Asus boards the "upper" limit of a sensor is encoded as delta from the "lower" limit. Fix the driver to correctly handle this case. Signed-off-by: Luca Tettamanti <kronos.it@gmail.com> Tested-by: Alex Macfarlane Smith <nospam@archifishal.co.uk> Signed-off-by: Jean Delvare <khali@linux-fr.org>
1016 lines
24 KiB
C
1016 lines
24 KiB
C
/*
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* Copyright (C) 2007-2009 Luca Tettamanti <kronos.it@gmail.com>
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*
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* This file is released under the GPLv2
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* See COPYING in the top level directory of the kernel tree.
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*/
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#include <linux/kernel.h>
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#include <linux/hwmon.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <acpi/acpi.h>
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#include <acpi/acpixf.h>
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#include <acpi/acpi_drivers.h>
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#include <acpi/acpi_bus.h>
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#define ATK_HID "ATK0110"
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/* Minimum time between readings, enforced in order to avoid
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* hogging the CPU.
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*/
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#define CACHE_TIME HZ
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#define BOARD_ID "MBIF"
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#define METHOD_ENUMERATE "GGRP"
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#define METHOD_READ "GITM"
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#define METHOD_WRITE "SITM"
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#define METHOD_OLD_READ_TMP "RTMP"
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#define METHOD_OLD_READ_VLT "RVLT"
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#define METHOD_OLD_READ_FAN "RFAN"
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#define METHOD_OLD_ENUM_TMP "TSIF"
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#define METHOD_OLD_ENUM_VLT "VSIF"
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#define METHOD_OLD_ENUM_FAN "FSIF"
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#define ATK_MUX_HWMON 0x00000006ULL
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#define ATK_CLASS_MASK 0xff000000ULL
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#define ATK_CLASS_FREQ_CTL 0x03000000ULL
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#define ATK_CLASS_FAN_CTL 0x04000000ULL
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#define ATK_CLASS_HWMON 0x06000000ULL
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#define ATK_TYPE_MASK 0x00ff0000ULL
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#define HWMON_TYPE_VOLT 0x00020000ULL
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#define HWMON_TYPE_TEMP 0x00030000ULL
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#define HWMON_TYPE_FAN 0x00040000ULL
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#define HWMON_SENSOR_ID_MASK 0x0000ffffULL
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enum atk_pack_member {
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HWMON_PACK_FLAGS,
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HWMON_PACK_NAME,
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HWMON_PACK_LIMIT1,
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HWMON_PACK_LIMIT2,
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HWMON_PACK_ENABLE
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};
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/* New package format */
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#define _HWMON_NEW_PACK_SIZE 7
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#define _HWMON_NEW_PACK_FLAGS 0
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#define _HWMON_NEW_PACK_NAME 1
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#define _HWMON_NEW_PACK_UNK1 2
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#define _HWMON_NEW_PACK_UNK2 3
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#define _HWMON_NEW_PACK_LIMIT1 4
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#define _HWMON_NEW_PACK_LIMIT2 5
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#define _HWMON_NEW_PACK_ENABLE 6
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/* Old package format */
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#define _HWMON_OLD_PACK_SIZE 5
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#define _HWMON_OLD_PACK_FLAGS 0
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#define _HWMON_OLD_PACK_NAME 1
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#define _HWMON_OLD_PACK_LIMIT1 2
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#define _HWMON_OLD_PACK_LIMIT2 3
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#define _HWMON_OLD_PACK_ENABLE 4
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struct atk_data {
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struct device *hwmon_dev;
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acpi_handle atk_handle;
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struct acpi_device *acpi_dev;
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bool old_interface;
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/* old interface */
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acpi_handle rtmp_handle;
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acpi_handle rvlt_handle;
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acpi_handle rfan_handle;
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/* new inteface */
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acpi_handle enumerate_handle;
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acpi_handle read_handle;
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int voltage_count;
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int temperature_count;
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int fan_count;
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struct list_head sensor_list;
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};
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typedef ssize_t (*sysfs_show_func)(struct device *dev,
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struct device_attribute *attr, char *buf);
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static const struct acpi_device_id atk_ids[] = {
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{ATK_HID, 0},
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{"", 0},
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};
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MODULE_DEVICE_TABLE(acpi, atk_ids);
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#define ATTR_NAME_SIZE 16 /* Worst case is "tempN_input" */
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struct atk_sensor_data {
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struct list_head list;
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struct atk_data *data;
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struct device_attribute label_attr;
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struct device_attribute input_attr;
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struct device_attribute limit1_attr;
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struct device_attribute limit2_attr;
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char label_attr_name[ATTR_NAME_SIZE];
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char input_attr_name[ATTR_NAME_SIZE];
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char limit1_attr_name[ATTR_NAME_SIZE];
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char limit2_attr_name[ATTR_NAME_SIZE];
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u64 id;
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u64 type;
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u64 limit1;
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u64 limit2;
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u64 cached_value;
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unsigned long last_updated; /* in jiffies */
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bool is_valid;
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char const *acpi_name;
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};
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struct atk_acpi_buffer_u64 {
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union acpi_object buf;
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u64 value;
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};
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static int atk_add(struct acpi_device *device);
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static int atk_remove(struct acpi_device *device, int type);
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static void atk_print_sensor(struct atk_data *data, union acpi_object *obj);
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static int atk_read_value(struct atk_sensor_data *sensor, u64 *value);
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static void atk_free_sensors(struct atk_data *data);
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static struct acpi_driver atk_driver = {
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.name = ATK_HID,
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.class = "hwmon",
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.ids = atk_ids,
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.ops = {
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.add = atk_add,
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.remove = atk_remove,
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},
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};
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#define input_to_atk_sensor(attr) \
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container_of(attr, struct atk_sensor_data, input_attr)
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#define label_to_atk_sensor(attr) \
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container_of(attr, struct atk_sensor_data, label_attr)
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#define limit1_to_atk_sensor(attr) \
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container_of(attr, struct atk_sensor_data, limit1_attr)
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#define limit2_to_atk_sensor(attr) \
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container_of(attr, struct atk_sensor_data, limit2_attr)
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static ssize_t atk_input_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct atk_sensor_data *s = input_to_atk_sensor(attr);
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u64 value;
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int err;
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err = atk_read_value(s, &value);
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if (err)
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return err;
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if (s->type == HWMON_TYPE_TEMP)
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/* ACPI returns decidegree */
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value *= 100;
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return sprintf(buf, "%llu\n", value);
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}
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static ssize_t atk_label_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct atk_sensor_data *s = label_to_atk_sensor(attr);
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return sprintf(buf, "%s\n", s->acpi_name);
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}
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static ssize_t atk_limit1_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct atk_sensor_data *s = limit1_to_atk_sensor(attr);
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u64 value = s->limit1;
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if (s->type == HWMON_TYPE_TEMP)
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value *= 100;
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return sprintf(buf, "%lld\n", value);
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}
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static ssize_t atk_limit2_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct atk_sensor_data *s = limit2_to_atk_sensor(attr);
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u64 value = s->limit2;
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if (s->type == HWMON_TYPE_TEMP)
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value *= 100;
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return sprintf(buf, "%lld\n", value);
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}
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static ssize_t atk_name_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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return sprintf(buf, "atk0110\n");
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}
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static struct device_attribute atk_name_attr =
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__ATTR(name, 0444, atk_name_show, NULL);
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static void atk_init_attribute(struct device_attribute *attr, char *name,
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sysfs_show_func show)
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{
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attr->attr.name = name;
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attr->attr.mode = 0444;
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attr->show = show;
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attr->store = NULL;
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}
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static union acpi_object *atk_get_pack_member(struct atk_data *data,
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union acpi_object *pack,
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enum atk_pack_member m)
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{
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bool old_if = data->old_interface;
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int offset;
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switch (m) {
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case HWMON_PACK_FLAGS:
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offset = old_if ? _HWMON_OLD_PACK_FLAGS : _HWMON_NEW_PACK_FLAGS;
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break;
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case HWMON_PACK_NAME:
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offset = old_if ? _HWMON_OLD_PACK_NAME : _HWMON_NEW_PACK_NAME;
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break;
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case HWMON_PACK_LIMIT1:
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offset = old_if ? _HWMON_OLD_PACK_LIMIT1 :
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_HWMON_NEW_PACK_LIMIT1;
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break;
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case HWMON_PACK_LIMIT2:
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offset = old_if ? _HWMON_OLD_PACK_LIMIT2 :
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_HWMON_NEW_PACK_LIMIT2;
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break;
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case HWMON_PACK_ENABLE:
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offset = old_if ? _HWMON_OLD_PACK_ENABLE :
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_HWMON_NEW_PACK_ENABLE;
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break;
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default:
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return NULL;
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}
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return &pack->package.elements[offset];
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}
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/* New package format is:
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* - flag (int)
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* class - used for de-muxing the request to the correct GITn
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* type (volt, temp, fan)
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* sensor id |
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* sensor id - used for de-muxing the request _inside_ the GITn
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* - name (str)
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* - unknown (int)
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* - unknown (int)
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* - limit1 (int)
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* - limit2 (int)
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* - enable (int)
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*
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* The old package has the same format but it's missing the two unknown fields.
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*/
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static int validate_hwmon_pack(struct atk_data *data, union acpi_object *obj)
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{
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struct device *dev = &data->acpi_dev->dev;
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union acpi_object *tmp;
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bool old_if = data->old_interface;
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int const expected_size = old_if ? _HWMON_OLD_PACK_SIZE :
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_HWMON_NEW_PACK_SIZE;
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if (obj->type != ACPI_TYPE_PACKAGE) {
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dev_warn(dev, "Invalid type: %d\n", obj->type);
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return -EINVAL;
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}
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if (obj->package.count != expected_size) {
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dev_warn(dev, "Invalid package size: %d, expected: %d\n",
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obj->package.count, expected_size);
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return -EINVAL;
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}
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tmp = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS);
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if (tmp->type != ACPI_TYPE_INTEGER) {
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dev_warn(dev, "Invalid type (flag): %d\n", tmp->type);
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return -EINVAL;
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}
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tmp = atk_get_pack_member(data, obj, HWMON_PACK_NAME);
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if (tmp->type != ACPI_TYPE_STRING) {
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dev_warn(dev, "Invalid type (name): %d\n", tmp->type);
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return -EINVAL;
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}
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/* Don't check... we don't know what they're useful for anyway */
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#if 0
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tmp = &obj->package.elements[HWMON_PACK_UNK1];
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if (tmp->type != ACPI_TYPE_INTEGER) {
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dev_warn(dev, "Invalid type (unk1): %d\n", tmp->type);
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return -EINVAL;
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}
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tmp = &obj->package.elements[HWMON_PACK_UNK2];
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if (tmp->type != ACPI_TYPE_INTEGER) {
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dev_warn(dev, "Invalid type (unk2): %d\n", tmp->type);
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return -EINVAL;
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}
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#endif
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tmp = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1);
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if (tmp->type != ACPI_TYPE_INTEGER) {
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dev_warn(dev, "Invalid type (limit1): %d\n", tmp->type);
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return -EINVAL;
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}
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tmp = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2);
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if (tmp->type != ACPI_TYPE_INTEGER) {
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dev_warn(dev, "Invalid type (limit2): %d\n", tmp->type);
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return -EINVAL;
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}
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tmp = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE);
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if (tmp->type != ACPI_TYPE_INTEGER) {
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dev_warn(dev, "Invalid type (enable): %d\n", tmp->type);
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return -EINVAL;
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}
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atk_print_sensor(data, obj);
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return 0;
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}
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#ifdef DEBUG
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static char const *atk_sensor_type(union acpi_object *flags)
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{
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u64 type = flags->integer.value & ATK_TYPE_MASK;
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char const *what;
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switch (type) {
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case HWMON_TYPE_VOLT:
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what = "voltage";
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break;
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case HWMON_TYPE_TEMP:
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what = "temperature";
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break;
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case HWMON_TYPE_FAN:
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what = "fan";
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break;
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default:
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what = "unknown";
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break;
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}
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return what;
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}
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#endif
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static void atk_print_sensor(struct atk_data *data, union acpi_object *obj)
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{
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#ifdef DEBUG
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struct device *dev = &data->acpi_dev->dev;
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union acpi_object *flags;
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union acpi_object *name;
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union acpi_object *limit1;
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union acpi_object *limit2;
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union acpi_object *enable;
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char const *what;
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flags = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS);
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name = atk_get_pack_member(data, obj, HWMON_PACK_NAME);
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limit1 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1);
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limit2 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2);
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enable = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE);
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what = atk_sensor_type(flags);
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dev_dbg(dev, "%s: %#llx %s [%llu-%llu] %s\n", what,
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flags->integer.value,
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name->string.pointer,
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limit1->integer.value, limit2->integer.value,
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enable->integer.value ? "enabled" : "disabled");
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#endif
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}
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static int atk_read_value_old(struct atk_sensor_data *sensor, u64 *value)
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{
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struct atk_data *data = sensor->data;
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struct device *dev = &data->acpi_dev->dev;
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struct acpi_object_list params;
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union acpi_object id;
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acpi_status status;
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acpi_handle method;
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switch (sensor->type) {
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case HWMON_TYPE_VOLT:
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method = data->rvlt_handle;
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break;
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case HWMON_TYPE_TEMP:
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method = data->rtmp_handle;
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break;
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case HWMON_TYPE_FAN:
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method = data->rfan_handle;
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break;
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default:
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return -EINVAL;
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}
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id.type = ACPI_TYPE_INTEGER;
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id.integer.value = sensor->id;
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params.count = 1;
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params.pointer = &id;
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status = acpi_evaluate_integer(method, NULL, ¶ms, value);
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if (status != AE_OK) {
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dev_warn(dev, "%s: ACPI exception: %s\n", __func__,
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acpi_format_exception(status));
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return -EIO;
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}
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return 0;
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}
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static int atk_read_value_new(struct atk_sensor_data *sensor, u64 *value)
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{
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struct atk_data *data = sensor->data;
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struct device *dev = &data->acpi_dev->dev;
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struct acpi_object_list params;
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struct acpi_buffer ret;
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union acpi_object id;
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struct atk_acpi_buffer_u64 tmp;
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acpi_status status;
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id.type = ACPI_TYPE_INTEGER;
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id.integer.value = sensor->id;
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params.count = 1;
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params.pointer = &id;
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tmp.buf.type = ACPI_TYPE_BUFFER;
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tmp.buf.buffer.pointer = (u8 *)&tmp.value;
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tmp.buf.buffer.length = sizeof(u64);
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ret.length = sizeof(tmp);
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ret.pointer = &tmp;
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status = acpi_evaluate_object_typed(data->read_handle, NULL, ¶ms,
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&ret, ACPI_TYPE_BUFFER);
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if (status != AE_OK) {
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dev_warn(dev, "%s: ACPI exception: %s\n", __func__,
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acpi_format_exception(status));
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return -EIO;
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}
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/* Return buffer format:
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* [0-3] "value" is valid flag
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* [4-7] value
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*/
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if (!(tmp.value & 0xffffffff)) {
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/* The reading is not valid, possible causes:
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* - sensor failure
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* - enumeration was FUBAR (and we didn't notice)
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*/
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dev_info(dev, "Failure: %#llx\n", tmp.value);
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return -EIO;
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}
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*value = (tmp.value & 0xffffffff00000000ULL) >> 32;
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return 0;
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}
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static int atk_read_value(struct atk_sensor_data *sensor, u64 *value)
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{
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int err;
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if (!sensor->is_valid ||
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time_after(jiffies, sensor->last_updated + CACHE_TIME)) {
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if (sensor->data->old_interface)
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err = atk_read_value_old(sensor, value);
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else
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err = atk_read_value_new(sensor, value);
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sensor->is_valid = true;
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sensor->last_updated = jiffies;
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sensor->cached_value = *value;
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} else {
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*value = sensor->cached_value;
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err = 0;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int atk_add_sensor(struct atk_data *data, union acpi_object *obj)
|
|
{
|
|
struct device *dev = &data->acpi_dev->dev;
|
|
union acpi_object *flags;
|
|
union acpi_object *name;
|
|
union acpi_object *limit1;
|
|
union acpi_object *limit2;
|
|
union acpi_object *enable;
|
|
struct atk_sensor_data *sensor;
|
|
char const *base_name;
|
|
char const *limit1_name;
|
|
char const *limit2_name;
|
|
u64 type;
|
|
int err;
|
|
int *num;
|
|
int start;
|
|
|
|
if (obj->type != ACPI_TYPE_PACKAGE) {
|
|
/* wft is this? */
|
|
dev_warn(dev, "Unknown type for ACPI object: (%d)\n",
|
|
obj->type);
|
|
return -EINVAL;
|
|
}
|
|
|
|
err = validate_hwmon_pack(data, obj);
|
|
if (err)
|
|
return err;
|
|
|
|
/* Ok, we have a valid hwmon package */
|
|
type = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS)->integer.value
|
|
& ATK_TYPE_MASK;
|
|
|
|
switch (type) {
|
|
case HWMON_TYPE_VOLT:
|
|
base_name = "in";
|
|
limit1_name = "min";
|
|
limit2_name = "max";
|
|
num = &data->voltage_count;
|
|
start = 0;
|
|
break;
|
|
case HWMON_TYPE_TEMP:
|
|
base_name = "temp";
|
|
limit1_name = "max";
|
|
limit2_name = "crit";
|
|
num = &data->temperature_count;
|
|
start = 1;
|
|
break;
|
|
case HWMON_TYPE_FAN:
|
|
base_name = "fan";
|
|
limit1_name = "min";
|
|
limit2_name = "max";
|
|
num = &data->fan_count;
|
|
start = 1;
|
|
break;
|
|
default:
|
|
dev_warn(dev, "Unknown sensor type: %#llx\n", type);
|
|
return -EINVAL;
|
|
}
|
|
|
|
enable = atk_get_pack_member(data, obj, HWMON_PACK_ENABLE);
|
|
if (!enable->integer.value)
|
|
/* sensor is disabled */
|
|
return 0;
|
|
|
|
flags = atk_get_pack_member(data, obj, HWMON_PACK_FLAGS);
|
|
name = atk_get_pack_member(data, obj, HWMON_PACK_NAME);
|
|
limit1 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT1);
|
|
limit2 = atk_get_pack_member(data, obj, HWMON_PACK_LIMIT2);
|
|
|
|
sensor = kzalloc(sizeof(*sensor), GFP_KERNEL);
|
|
if (!sensor)
|
|
return -ENOMEM;
|
|
|
|
sensor->acpi_name = kstrdup(name->string.pointer, GFP_KERNEL);
|
|
if (!sensor->acpi_name) {
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
INIT_LIST_HEAD(&sensor->list);
|
|
sensor->type = type;
|
|
sensor->data = data;
|
|
sensor->id = flags->integer.value;
|
|
sensor->limit1 = limit1->integer.value;
|
|
if (data->old_interface)
|
|
sensor->limit2 = limit2->integer.value;
|
|
else
|
|
/* The upper limit is expressed as delta from lower limit */
|
|
sensor->limit2 = sensor->limit1 + limit2->integer.value;
|
|
|
|
snprintf(sensor->input_attr_name, ATTR_NAME_SIZE,
|
|
"%s%d_input", base_name, start + *num);
|
|
atk_init_attribute(&sensor->input_attr,
|
|
sensor->input_attr_name,
|
|
atk_input_show);
|
|
|
|
snprintf(sensor->label_attr_name, ATTR_NAME_SIZE,
|
|
"%s%d_label", base_name, start + *num);
|
|
atk_init_attribute(&sensor->label_attr,
|
|
sensor->label_attr_name,
|
|
atk_label_show);
|
|
|
|
snprintf(sensor->limit1_attr_name, ATTR_NAME_SIZE,
|
|
"%s%d_%s", base_name, start + *num, limit1_name);
|
|
atk_init_attribute(&sensor->limit1_attr,
|
|
sensor->limit1_attr_name,
|
|
atk_limit1_show);
|
|
|
|
snprintf(sensor->limit2_attr_name, ATTR_NAME_SIZE,
|
|
"%s%d_%s", base_name, start + *num, limit2_name);
|
|
atk_init_attribute(&sensor->limit2_attr,
|
|
sensor->limit2_attr_name,
|
|
atk_limit2_show);
|
|
|
|
list_add(&sensor->list, &data->sensor_list);
|
|
(*num)++;
|
|
|
|
return 1;
|
|
out:
|
|
kfree(sensor->acpi_name);
|
|
kfree(sensor);
|
|
return err;
|
|
}
|
|
|
|
static int atk_enumerate_old_hwmon(struct atk_data *data)
|
|
{
|
|
struct device *dev = &data->acpi_dev->dev;
|
|
struct acpi_buffer buf;
|
|
union acpi_object *pack;
|
|
acpi_status status;
|
|
int i, ret;
|
|
int count = 0;
|
|
|
|
/* Voltages */
|
|
buf.length = ACPI_ALLOCATE_BUFFER;
|
|
status = acpi_evaluate_object_typed(data->atk_handle,
|
|
METHOD_OLD_ENUM_VLT, NULL, &buf, ACPI_TYPE_PACKAGE);
|
|
if (status != AE_OK) {
|
|
dev_warn(dev, METHOD_OLD_ENUM_VLT ": ACPI exception: %s\n",
|
|
acpi_format_exception(status));
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
pack = buf.pointer;
|
|
for (i = 1; i < pack->package.count; i++) {
|
|
union acpi_object *obj = &pack->package.elements[i];
|
|
|
|
ret = atk_add_sensor(data, obj);
|
|
if (ret > 0)
|
|
count++;
|
|
}
|
|
ACPI_FREE(buf.pointer);
|
|
|
|
/* Temperatures */
|
|
buf.length = ACPI_ALLOCATE_BUFFER;
|
|
status = acpi_evaluate_object_typed(data->atk_handle,
|
|
METHOD_OLD_ENUM_TMP, NULL, &buf, ACPI_TYPE_PACKAGE);
|
|
if (status != AE_OK) {
|
|
dev_warn(dev, METHOD_OLD_ENUM_TMP ": ACPI exception: %s\n",
|
|
acpi_format_exception(status));
|
|
|
|
ret = -ENODEV;
|
|
goto cleanup;
|
|
}
|
|
|
|
pack = buf.pointer;
|
|
for (i = 1; i < pack->package.count; i++) {
|
|
union acpi_object *obj = &pack->package.elements[i];
|
|
|
|
ret = atk_add_sensor(data, obj);
|
|
if (ret > 0)
|
|
count++;
|
|
}
|
|
ACPI_FREE(buf.pointer);
|
|
|
|
/* Fans */
|
|
buf.length = ACPI_ALLOCATE_BUFFER;
|
|
status = acpi_evaluate_object_typed(data->atk_handle,
|
|
METHOD_OLD_ENUM_FAN, NULL, &buf, ACPI_TYPE_PACKAGE);
|
|
if (status != AE_OK) {
|
|
dev_warn(dev, METHOD_OLD_ENUM_FAN ": ACPI exception: %s\n",
|
|
acpi_format_exception(status));
|
|
|
|
ret = -ENODEV;
|
|
goto cleanup;
|
|
}
|
|
|
|
pack = buf.pointer;
|
|
for (i = 1; i < pack->package.count; i++) {
|
|
union acpi_object *obj = &pack->package.elements[i];
|
|
|
|
ret = atk_add_sensor(data, obj);
|
|
if (ret > 0)
|
|
count++;
|
|
}
|
|
ACPI_FREE(buf.pointer);
|
|
|
|
return count;
|
|
cleanup:
|
|
atk_free_sensors(data);
|
|
return ret;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
for (i = 0; i < pack->package.count; i++) {
|
|
union acpi_object *obj = &pack->package.elements[i];
|
|
|
|
atk_add_sensor(data, obj);
|
|
}
|
|
|
|
err = data->voltage_count + data->temperature_count + data->fan_count;
|
|
|
|
out:
|
|
ACPI_FREE(buf.pointer);
|
|
return err;
|
|
}
|
|
|
|
static int atk_create_files(struct atk_data *data)
|
|
{
|
|
struct atk_sensor_data *s;
|
|
int err;
|
|
|
|
list_for_each_entry(s, &data->sensor_list, list) {
|
|
err = device_create_file(data->hwmon_dev, &s->input_attr);
|
|
if (err)
|
|
return err;
|
|
err = device_create_file(data->hwmon_dev, &s->label_attr);
|
|
if (err)
|
|
return err;
|
|
err = device_create_file(data->hwmon_dev, &s->limit1_attr);
|
|
if (err)
|
|
return err;
|
|
err = device_create_file(data->hwmon_dev, &s->limit2_attr);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
err = device_create_file(data->hwmon_dev, &atk_name_attr);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void atk_remove_files(struct atk_data *data)
|
|
{
|
|
struct atk_sensor_data *s;
|
|
|
|
list_for_each_entry(s, &data->sensor_list, list) {
|
|
device_remove_file(data->hwmon_dev, &s->input_attr);
|
|
device_remove_file(data->hwmon_dev, &s->label_attr);
|
|
device_remove_file(data->hwmon_dev, &s->limit1_attr);
|
|
device_remove_file(data->hwmon_dev, &s->limit2_attr);
|
|
}
|
|
device_remove_file(data->hwmon_dev, &atk_name_attr);
|
|
}
|
|
|
|
static void atk_free_sensors(struct atk_data *data)
|
|
{
|
|
struct list_head *head = &data->sensor_list;
|
|
struct atk_sensor_data *s, *tmp;
|
|
|
|
list_for_each_entry_safe(s, tmp, head, list) {
|
|
kfree(s->acpi_name);
|
|
kfree(s);
|
|
}
|
|
}
|
|
|
|
static int atk_register_hwmon(struct atk_data *data)
|
|
{
|
|
struct device *dev = &data->acpi_dev->dev;
|
|
int err;
|
|
|
|
dev_dbg(dev, "registering hwmon device\n");
|
|
data->hwmon_dev = hwmon_device_register(dev);
|
|
if (IS_ERR(data->hwmon_dev))
|
|
return PTR_ERR(data->hwmon_dev);
|
|
|
|
dev_dbg(dev, "populating sysfs directory\n");
|
|
err = atk_create_files(data);
|
|
if (err)
|
|
goto remove;
|
|
|
|
return 0;
|
|
remove:
|
|
/* Cleanup the registered files */
|
|
atk_remove_files(data);
|
|
hwmon_device_unregister(data->hwmon_dev);
|
|
return err;
|
|
}
|
|
|
|
static int atk_check_old_if(struct atk_data *data)
|
|
{
|
|
struct device *dev = &data->acpi_dev->dev;
|
|
acpi_handle ret;
|
|
acpi_status status;
|
|
|
|
/* RTMP: read temperature */
|
|
status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_TMP, &ret);
|
|
if (status != AE_OK) {
|
|
dev_dbg(dev, "method " METHOD_OLD_READ_TMP " not found: %s\n",
|
|
acpi_format_exception(status));
|
|
return -ENODEV;
|
|
}
|
|
data->rtmp_handle = ret;
|
|
|
|
/* RVLT: read voltage */
|
|
status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_VLT, &ret);
|
|
if (status != AE_OK) {
|
|
dev_dbg(dev, "method " METHOD_OLD_READ_VLT " not found: %s\n",
|
|
acpi_format_exception(status));
|
|
return -ENODEV;
|
|
}
|
|
data->rvlt_handle = ret;
|
|
|
|
/* RFAN: read fan status */
|
|
status = acpi_get_handle(data->atk_handle, METHOD_OLD_READ_FAN, &ret);
|
|
if (status != AE_OK) {
|
|
dev_dbg(dev, "method " METHOD_OLD_READ_FAN " not found: %s\n",
|
|
acpi_format_exception(status));
|
|
return -ENODEV;
|
|
}
|
|
data->rfan_handle = ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int atk_check_new_if(struct atk_data *data)
|
|
{
|
|
struct device *dev = &data->acpi_dev->dev;
|
|
acpi_handle ret;
|
|
acpi_status status;
|
|
|
|
/* Enumeration */
|
|
status = acpi_get_handle(data->atk_handle, METHOD_ENUMERATE, &ret);
|
|
if (status != AE_OK) {
|
|
dev_dbg(dev, "method " METHOD_ENUMERATE " not found: %s\n",
|
|
acpi_format_exception(status));
|
|
return -ENODEV;
|
|
}
|
|
data->enumerate_handle = ret;
|
|
|
|
/* De-multiplexer (read) */
|
|
status = acpi_get_handle(data->atk_handle, METHOD_READ, &ret);
|
|
if (status != AE_OK) {
|
|
dev_dbg(dev, "method " METHOD_READ " not found: %s\n",
|
|
acpi_format_exception(status));
|
|
return -ENODEV;
|
|
}
|
|
data->read_handle = ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int atk_add(struct acpi_device *device)
|
|
{
|
|
acpi_status ret;
|
|
int err;
|
|
struct acpi_buffer buf;
|
|
union acpi_object *obj;
|
|
struct atk_data *data;
|
|
|
|
dev_dbg(&device->dev, "adding...\n");
|
|
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
data->acpi_dev = device;
|
|
data->atk_handle = device->handle;
|
|
INIT_LIST_HEAD(&data->sensor_list);
|
|
|
|
buf.length = ACPI_ALLOCATE_BUFFER;
|
|
ret = acpi_evaluate_object_typed(data->atk_handle, BOARD_ID, NULL,
|
|
&buf, ACPI_TYPE_PACKAGE);
|
|
if (ret != AE_OK) {
|
|
dev_dbg(&device->dev, "atk: method MBIF not found\n");
|
|
err = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
obj = buf.pointer;
|
|
if (obj->package.count >= 2 &&
|
|
obj->package.elements[1].type == ACPI_TYPE_STRING) {
|
|
dev_dbg(&device->dev, "board ID = %s\n",
|
|
obj->package.elements[1].string.pointer);
|
|
}
|
|
ACPI_FREE(buf.pointer);
|
|
|
|
/* Check for hwmon methods: first check "old" style methods; note that
|
|
* both may be present: in this case we stick to the old interface;
|
|
* analysis of multiple DSDTs indicates that when both interfaces
|
|
* are present the new one (GGRP/GITM) is not functional.
|
|
*/
|
|
err = atk_check_old_if(data);
|
|
if (!err) {
|
|
dev_dbg(&device->dev, "Using old hwmon interface\n");
|
|
data->old_interface = true;
|
|
} else {
|
|
err = atk_check_new_if(data);
|
|
if (err)
|
|
goto out;
|
|
|
|
dev_dbg(&device->dev, "Using new hwmon interface\n");
|
|
data->old_interface = false;
|
|
}
|
|
|
|
if (data->old_interface)
|
|
err = atk_enumerate_old_hwmon(data);
|
|
else
|
|
err = atk_enumerate_new_hwmon(data);
|
|
if (err < 0)
|
|
goto out;
|
|
if (err == 0) {
|
|
dev_info(&device->dev,
|
|
"No usable sensor detected, bailing out\n");
|
|
err = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
err = atk_register_hwmon(data);
|
|
if (err)
|
|
goto cleanup;
|
|
|
|
device->driver_data = data;
|
|
return 0;
|
|
cleanup:
|
|
atk_free_sensors(data);
|
|
out:
|
|
kfree(data);
|
|
return err;
|
|
}
|
|
|
|
static int atk_remove(struct acpi_device *device, int type)
|
|
{
|
|
struct atk_data *data = device->driver_data;
|
|
dev_dbg(&device->dev, "removing...\n");
|
|
|
|
device->driver_data = NULL;
|
|
|
|
atk_remove_files(data);
|
|
atk_free_sensors(data);
|
|
hwmon_device_unregister(data->hwmon_dev);
|
|
|
|
kfree(data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init atk0110_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = acpi_bus_register_driver(&atk_driver);
|
|
if (ret)
|
|
pr_info("atk: acpi_bus_register_driver failed: %d\n", ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void __exit atk0110_exit(void)
|
|
{
|
|
acpi_bus_unregister_driver(&atk_driver);
|
|
}
|
|
|
|
module_init(atk0110_init);
|
|
module_exit(atk0110_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|