1f1e1ea51SMario Limonciello // SPDX-License-Identifier: GPL-2.0 2f1e1ea51SMario Limonciello /* 3f1e1ea51SMario Limonciello * Functions corresponding to integer type attributes under BIOS Integer GUID for use with 4f1e1ea51SMario Limonciello * dell-wmi-sysman 5f1e1ea51SMario Limonciello * 6f1e1ea51SMario Limonciello * Copyright (c) 2020 Dell Inc. 7f1e1ea51SMario Limonciello */ 8f1e1ea51SMario Limonciello 9f1e1ea51SMario Limonciello #include "dell-wmi-sysman.h" 10f1e1ea51SMario Limonciello 11f1e1ea51SMario Limonciello enum int_properties {MIN_VALUE = 6, MAX_VALUE, SCALAR_INCR}; 12f1e1ea51SMario Limonciello 13f1e1ea51SMario Limonciello get_instance_id(integer); 14f1e1ea51SMario Limonciello 15f1e1ea51SMario Limonciello static ssize_t current_value_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) 16f1e1ea51SMario Limonciello { 17f1e1ea51SMario Limonciello int instance_id = get_integer_instance_id(kobj); 18f1e1ea51SMario Limonciello union acpi_object *obj; 19f1e1ea51SMario Limonciello ssize_t ret; 20f1e1ea51SMario Limonciello 21f1e1ea51SMario Limonciello if (instance_id < 0) 22f1e1ea51SMario Limonciello return instance_id; 23f1e1ea51SMario Limonciello 24f1e1ea51SMario Limonciello /* need to use specific instance_id and guid combination to get right data */ 25f1e1ea51SMario Limonciello obj = get_wmiobj_pointer(instance_id, DELL_WMI_BIOS_INTEGER_ATTRIBUTE_GUID); 26f1e1ea51SMario Limonciello if (!obj) 27f1e1ea51SMario Limonciello return -EIO; 28f1e1ea51SMario Limonciello if (obj->package.elements[CURRENT_VAL].type != ACPI_TYPE_INTEGER) { 29f1e1ea51SMario Limonciello kfree(obj); 30f1e1ea51SMario Limonciello return -EINVAL; 31f1e1ea51SMario Limonciello } 32f1e1ea51SMario Limonciello ret = snprintf(buf, PAGE_SIZE, "%lld\n", obj->package.elements[CURRENT_VAL].integer.value); 33f1e1ea51SMario Limonciello kfree(obj); 34f1e1ea51SMario Limonciello return ret; 35f1e1ea51SMario Limonciello } 36f1e1ea51SMario Limonciello 37f1e1ea51SMario Limonciello /** 38f1e1ea51SMario Limonciello * validate_integer_input() - Validate input of current_value against lower and upper bound 39f1e1ea51SMario Limonciello * @instance_id: The instance on which input is validated 40f1e1ea51SMario Limonciello * @buf: Input value 41f1e1ea51SMario Limonciello */ 42f1e1ea51SMario Limonciello static int validate_integer_input(int instance_id, char *buf) 43f1e1ea51SMario Limonciello { 44f1e1ea51SMario Limonciello int in_val; 45f1e1ea51SMario Limonciello int ret; 46f1e1ea51SMario Limonciello 47f1e1ea51SMario Limonciello ret = kstrtoint(buf, 0, &in_val); 48f1e1ea51SMario Limonciello if (ret) 49f1e1ea51SMario Limonciello return ret; 50f1e1ea51SMario Limonciello if (in_val < wmi_priv.integer_data[instance_id].min_value || 51f1e1ea51SMario Limonciello in_val > wmi_priv.integer_data[instance_id].max_value) 52f1e1ea51SMario Limonciello return -EINVAL; 53f1e1ea51SMario Limonciello 54f1e1ea51SMario Limonciello /* workaround for BIOS error. 55f1e1ea51SMario Limonciello * validate input to avoid setting 0 when integer input passed with + sign 56f1e1ea51SMario Limonciello */ 57f1e1ea51SMario Limonciello if (*buf == '+') 58f1e1ea51SMario Limonciello memmove(buf, (buf + 1), strlen(buf + 1) + 1); 59f1e1ea51SMario Limonciello 60f1e1ea51SMario Limonciello return ret; 61f1e1ea51SMario Limonciello } 62f1e1ea51SMario Limonciello 63f1e1ea51SMario Limonciello attribute_s_property_show(display_name_language_code, integer); 64f1e1ea51SMario Limonciello static struct kobj_attribute integer_displ_langcode = 65f1e1ea51SMario Limonciello __ATTR_RO(display_name_language_code); 66f1e1ea51SMario Limonciello 67f1e1ea51SMario Limonciello attribute_s_property_show(display_name, integer); 68f1e1ea51SMario Limonciello static struct kobj_attribute integer_displ_name = 69f1e1ea51SMario Limonciello __ATTR_RO(display_name); 70f1e1ea51SMario Limonciello 71f1e1ea51SMario Limonciello attribute_n_property_show(default_value, integer); 72f1e1ea51SMario Limonciello static struct kobj_attribute integer_default_val = 73f1e1ea51SMario Limonciello __ATTR_RO(default_value); 74f1e1ea51SMario Limonciello 75f1e1ea51SMario Limonciello attribute_property_store(current_value, integer); 76f1e1ea51SMario Limonciello static struct kobj_attribute integer_current_val = 77f1e1ea51SMario Limonciello __ATTR_RW_MODE(current_value, 0600); 78f1e1ea51SMario Limonciello 79f1e1ea51SMario Limonciello attribute_s_property_show(dell_modifier, integer); 80f1e1ea51SMario Limonciello static struct kobj_attribute integer_modifier = 81f1e1ea51SMario Limonciello __ATTR_RO(dell_modifier); 82f1e1ea51SMario Limonciello 83f1e1ea51SMario Limonciello attribute_n_property_show(min_value, integer); 84f1e1ea51SMario Limonciello static struct kobj_attribute integer_lower_bound = 85f1e1ea51SMario Limonciello __ATTR_RO(min_value); 86f1e1ea51SMario Limonciello 87f1e1ea51SMario Limonciello attribute_n_property_show(max_value, integer); 88f1e1ea51SMario Limonciello static struct kobj_attribute integer_upper_bound = 89f1e1ea51SMario Limonciello __ATTR_RO(max_value); 90f1e1ea51SMario Limonciello 91f1e1ea51SMario Limonciello attribute_n_property_show(scalar_increment, integer); 92f1e1ea51SMario Limonciello static struct kobj_attribute integer_scalar_increment = 93f1e1ea51SMario Limonciello __ATTR_RO(scalar_increment); 94f1e1ea51SMario Limonciello 95f1e1ea51SMario Limonciello static ssize_t type_show(struct kobject *kobj, struct kobj_attribute *attr, 96f1e1ea51SMario Limonciello char *buf) 97f1e1ea51SMario Limonciello { 98f1e1ea51SMario Limonciello return sprintf(buf, "integer\n"); 99f1e1ea51SMario Limonciello } 100f1e1ea51SMario Limonciello static struct kobj_attribute integer_type = 101f1e1ea51SMario Limonciello __ATTR_RO(type); 102f1e1ea51SMario Limonciello 103f1e1ea51SMario Limonciello static struct attribute *integer_attrs[] = { 104f1e1ea51SMario Limonciello &integer_displ_langcode.attr, 105f1e1ea51SMario Limonciello &integer_displ_name.attr, 106f1e1ea51SMario Limonciello &integer_default_val.attr, 107f1e1ea51SMario Limonciello &integer_current_val.attr, 108f1e1ea51SMario Limonciello &integer_modifier.attr, 109f1e1ea51SMario Limonciello &integer_lower_bound.attr, 110f1e1ea51SMario Limonciello &integer_upper_bound.attr, 111f1e1ea51SMario Limonciello &integer_scalar_increment.attr, 112f1e1ea51SMario Limonciello &integer_type.attr, 113f1e1ea51SMario Limonciello NULL, 114f1e1ea51SMario Limonciello }; 115f1e1ea51SMario Limonciello 116f1e1ea51SMario Limonciello static const struct attribute_group integer_attr_group = { 117f1e1ea51SMario Limonciello .attrs = integer_attrs, 118f1e1ea51SMario Limonciello }; 119f1e1ea51SMario Limonciello 120f1e1ea51SMario Limonciello int alloc_int_data(void) 121f1e1ea51SMario Limonciello { 122f1e1ea51SMario Limonciello int ret = 0; 123f1e1ea51SMario Limonciello 124f1e1ea51SMario Limonciello wmi_priv.integer_instances_count = get_instance_count(DELL_WMI_BIOS_INTEGER_ATTRIBUTE_GUID); 125f1e1ea51SMario Limonciello wmi_priv.integer_data = kcalloc(wmi_priv.integer_instances_count, 126f1e1ea51SMario Limonciello sizeof(struct integer_data), GFP_KERNEL); 127f1e1ea51SMario Limonciello if (!wmi_priv.integer_data) { 128f1e1ea51SMario Limonciello wmi_priv.integer_instances_count = 0; 129f1e1ea51SMario Limonciello ret = -ENOMEM; 130f1e1ea51SMario Limonciello } 131f1e1ea51SMario Limonciello return ret; 132f1e1ea51SMario Limonciello } 133f1e1ea51SMario Limonciello 134f1e1ea51SMario Limonciello /** 135f1e1ea51SMario Limonciello * populate_int_data() - Populate all properties of an instance under integer attribute 136f1e1ea51SMario Limonciello * @integer_obj: ACPI object with integer data 137f1e1ea51SMario Limonciello * @instance_id: The instance to enumerate 138f1e1ea51SMario Limonciello * @attr_name_kobj: The parent kernel object 139f1e1ea51SMario Limonciello */ 140f1e1ea51SMario Limonciello int populate_int_data(union acpi_object *integer_obj, int instance_id, 141f1e1ea51SMario Limonciello struct kobject *attr_name_kobj) 142f1e1ea51SMario Limonciello { 143f1e1ea51SMario Limonciello wmi_priv.integer_data[instance_id].attr_name_kobj = attr_name_kobj; 144*97be86e3SPrasanth KSR if (check_property_type(integer, ATTR_NAME, ACPI_TYPE_STRING)) 145*97be86e3SPrasanth KSR return -EINVAL; 146f1e1ea51SMario Limonciello strlcpy_attr(wmi_priv.integer_data[instance_id].attribute_name, 147f1e1ea51SMario Limonciello integer_obj[ATTR_NAME].string.pointer); 148*97be86e3SPrasanth KSR if (check_property_type(integer, DISPL_NAME_LANG_CODE, ACPI_TYPE_STRING)) 149*97be86e3SPrasanth KSR return -EINVAL; 150f1e1ea51SMario Limonciello strlcpy_attr(wmi_priv.integer_data[instance_id].display_name_language_code, 151f1e1ea51SMario Limonciello integer_obj[DISPL_NAME_LANG_CODE].string.pointer); 152*97be86e3SPrasanth KSR if (check_property_type(integer, DISPLAY_NAME, ACPI_TYPE_STRING)) 153*97be86e3SPrasanth KSR return -EINVAL; 154f1e1ea51SMario Limonciello strlcpy_attr(wmi_priv.integer_data[instance_id].display_name, 155f1e1ea51SMario Limonciello integer_obj[DISPLAY_NAME].string.pointer); 156*97be86e3SPrasanth KSR if (check_property_type(integer, DEFAULT_VAL, ACPI_TYPE_INTEGER)) 157*97be86e3SPrasanth KSR return -EINVAL; 158f1e1ea51SMario Limonciello wmi_priv.integer_data[instance_id].default_value = 159f1e1ea51SMario Limonciello (uintptr_t)integer_obj[DEFAULT_VAL].string.pointer; 160*97be86e3SPrasanth KSR if (check_property_type(integer, MODIFIER, ACPI_TYPE_STRING)) 161*97be86e3SPrasanth KSR return -EINVAL; 162f1e1ea51SMario Limonciello strlcpy_attr(wmi_priv.integer_data[instance_id].dell_modifier, 163f1e1ea51SMario Limonciello integer_obj[MODIFIER].string.pointer); 164*97be86e3SPrasanth KSR if (check_property_type(integer, MIN_VALUE, ACPI_TYPE_INTEGER)) 165*97be86e3SPrasanth KSR return -EINVAL; 166f1e1ea51SMario Limonciello wmi_priv.integer_data[instance_id].min_value = 167f1e1ea51SMario Limonciello (uintptr_t)integer_obj[MIN_VALUE].string.pointer; 168*97be86e3SPrasanth KSR if (check_property_type(integer, MAX_VALUE, ACPI_TYPE_INTEGER)) 169*97be86e3SPrasanth KSR return -EINVAL; 170f1e1ea51SMario Limonciello wmi_priv.integer_data[instance_id].max_value = 171f1e1ea51SMario Limonciello (uintptr_t)integer_obj[MAX_VALUE].string.pointer; 172*97be86e3SPrasanth KSR if (check_property_type(integer, SCALAR_INCR, ACPI_TYPE_INTEGER)) 173*97be86e3SPrasanth KSR return -EINVAL; 174f1e1ea51SMario Limonciello wmi_priv.integer_data[instance_id].scalar_increment = 175f1e1ea51SMario Limonciello (uintptr_t)integer_obj[SCALAR_INCR].string.pointer; 176f1e1ea51SMario Limonciello 177f1e1ea51SMario Limonciello return sysfs_create_group(attr_name_kobj, &integer_attr_group); 178f1e1ea51SMario Limonciello } 179f1e1ea51SMario Limonciello 180f1e1ea51SMario Limonciello /** 181f1e1ea51SMario Limonciello * exit_int_attributes() - Clear all attribute data 182f1e1ea51SMario Limonciello * 183f1e1ea51SMario Limonciello * Clears all data allocated for this group of attributes 184f1e1ea51SMario Limonciello */ 185f1e1ea51SMario Limonciello void exit_int_attributes(void) 186f1e1ea51SMario Limonciello { 187f1e1ea51SMario Limonciello int instance_id; 188f1e1ea51SMario Limonciello 189f1e1ea51SMario Limonciello for (instance_id = 0; instance_id < wmi_priv.integer_instances_count; instance_id++) { 190f1e1ea51SMario Limonciello if (wmi_priv.integer_data[instance_id].attr_name_kobj) 191f1e1ea51SMario Limonciello sysfs_remove_group(wmi_priv.integer_data[instance_id].attr_name_kobj, 192f1e1ea51SMario Limonciello &integer_attr_group); 193f1e1ea51SMario Limonciello } 1942d0c418cSHans de Goede wmi_priv.integer_instances_count = 0; 1952d0c418cSHans de Goede 196f1e1ea51SMario Limonciello kfree(wmi_priv.integer_data); 1972d0c418cSHans de Goede wmi_priv.integer_data = NULL; 198f1e1ea51SMario Limonciello } 199