diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/platform/x86/Kconfig | 12 | ||||
| -rw-r--r-- | drivers/platform/x86/Makefile | 1 | ||||
| -rw-r--r-- | drivers/platform/x86/intel-rst.c | 209 |
3 files changed, 222 insertions, 0 deletions
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index 37645b923c52..36057f481162 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -782,6 +782,18 @@ config APPLE_GMUX graphics as well as the backlight. Currently only backlight control is supported by the driver. +config INTEL_RST + tristate "Intel Rapid Start Technology Driver" + depends on ACPI + ---help--- + This driver provides support for modifying paramaters on systems + equipped with Intel's Rapid Start Technology. When put in an ACPI + sleep state, these devices will wake after either a configured + timeout or when the system battery reaches a critical state, + automatically copying memory contents to disk. On resume, the + firmware will copy the memory contents back to RAM and resume the OS + as usual. + config PVPANIC tristate "pvpanic device support" depends on ACPI diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile index ef0ec746f78c..5c669ce8d243 100644 --- a/drivers/platform/x86/Makefile +++ b/drivers/platform/x86/Makefile @@ -51,5 +51,6 @@ obj-$(CONFIG_INTEL_OAKTRAIL) += intel_oaktrail.o obj-$(CONFIG_SAMSUNG_Q10) += samsung-q10.o obj-$(CONFIG_APPLE_GMUX) += apple-gmux.o obj-$(CONFIG_CHROMEOS_LAPTOP) += chromeos_laptop.o +obj-$(CONFIG_INTEL_RST) += intel-rst.o obj-$(CONFIG_PVPANIC) += pvpanic.o diff --git a/drivers/platform/x86/intel-rst.c b/drivers/platform/x86/intel-rst.c new file mode 100644 index 000000000000..9385afd9b558 --- /dev/null +++ b/drivers/platform/x86/intel-rst.c @@ -0,0 +1,209 @@ +/* + * 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, + }, +}; + +static int irst_init(void) +{ + return acpi_bus_register_driver(&irst_driver); +} + +static void irst_exit(void) +{ + acpi_bus_unregister_driver(&irst_driver); +} + +module_init(irst_init); +module_exit(irst_exit); + +MODULE_DEVICE_TABLE(acpi, irst_ids); |