/* * Copyright 2013 Matthew Garrett <mjg59@srcf.ucam.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include <linux/init.h> #include <linux/module.h> #include <linux/slab.h> #include <acpi/acpi_drivers.h> MODULE_LICENSE("GPL"); static ssize_t irst_show_wakeup_events(struct device *dev, struct device_attribute *attr, char *buf) { struct acpi_device *acpi; struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; union acpi_object *result; acpi_status status; acpi = to_acpi_device(dev); status = acpi_evaluate_object(acpi->handle, "GFFS", NULL, &output); if (!ACPI_SUCCESS(status)) return -EINVAL; result = output.pointer; if (result->type != ACPI_TYPE_INTEGER) { kfree(result); return -EINVAL; } return sprintf(buf, "%lld\n", result->integer.value); } static ssize_t irst_store_wakeup_events(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct acpi_device *acpi; struct acpi_object_list input; union acpi_object param; acpi_status status; unsigned long value; int error; acpi = to_acpi_device(dev); error = kstrtoul(buf, 0, &value); if (error) return error; param.type = ACPI_TYPE_INTEGER; param.integer.value = value; input.count = 1; input.pointer = ¶m; status = acpi_evaluate_object(acpi->handle, "SFFS", &input, NULL); if (!ACPI_SUCCESS(status)) return -EINVAL; return count; } static struct device_attribute irst_wakeup_attr = { .attr = { .name = "wakeup_events", .mode = 0600 }, .show = irst_show_wakeup_events, .store = irst_store_wakeup_events }; static ssize_t irst_show_wakeup_time(struct device *dev, struct device_attribute *attr, char *buf) { struct acpi_device *acpi; struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; union acpi_object *result; acpi_status status; acpi = to_acpi_device(dev); status = acpi_evaluate_object(acpi->handle, "GFTV", NULL, &output); if (!ACPI_SUCCESS(status)) return -EINVAL; result = output.pointer; if (result->type != ACPI_TYPE_INTEGER) { kfree(result); return -EINVAL; } return sprintf(buf, "%lld\n", result->integer.value); } static ssize_t irst_store_wakeup_time(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct acpi_device *acpi; struct acpi_object_list input; union acpi_object param; acpi_status status; unsigned long value; int error; acpi = to_acpi_device(dev); error = kstrtoul(buf, 0, &value); if (error) return error; param.type = ACPI_TYPE_INTEGER; param.integer.value = value; input.count = 1; input.pointer = ¶m; status = acpi_evaluate_object(acpi->handle, "SFTV", &input, NULL); if (!ACPI_SUCCESS(status)) return -EINVAL; return count; } static struct device_attribute irst_timeout_attr = { .attr = { .name = "wakeup_time", .mode = 0600 }, .show = irst_show_wakeup_time, .store = irst_store_wakeup_time }; static int irst_add(struct acpi_device *acpi) { int error = 0; error = device_create_file(&acpi->dev, &irst_timeout_attr); if (error) goto out; error = device_create_file(&acpi->dev, &irst_wakeup_attr); if (error) goto out_timeout; return 0; out_timeout: device_remove_file(&acpi->dev, &irst_timeout_attr); out: return error; } static int irst_remove(struct acpi_device *acpi) { device_remove_file(&acpi->dev, &irst_wakeup_attr); device_remove_file(&acpi->dev, &irst_timeout_attr); return 0; } static const struct acpi_device_id irst_ids[] = { {"INT3392", 0}, {"", 0} }; static struct acpi_driver irst_driver = { .owner = THIS_MODULE, .name = "intel_rapid_start", .class = "intel_rapid_start", .ids = irst_ids, .ops = { .add = irst_add, .remove = irst_remove, }, }; module_acpi_driver(irst_driver); MODULE_DEVICE_TABLE(acpi, irst_ids);