diff options
Diffstat (limited to 'drivers/thermal/int340x_thermal/int3400_thermal.c')
| -rw-r--r-- | drivers/thermal/int340x_thermal/int3400_thermal.c | 340 |
1 files changed, 0 insertions, 340 deletions
diff --git a/drivers/thermal/int340x_thermal/int3400_thermal.c b/drivers/thermal/int340x_thermal/int3400_thermal.c deleted file mode 100644 index a9ec94ed7a42..000000000000 --- a/drivers/thermal/int340x_thermal/int3400_thermal.c +++ /dev/null @@ -1,340 +0,0 @@ -/* - * INT3400 thermal driver - * - * Copyright (C) 2014, Intel Corporation - * Authors: Zhang Rui <rui.zhang@intel.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - */ - -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/acpi.h> -#include <linux/thermal.h> -#include "acpi_thermal_rel.h" - -enum int3400_thermal_uuid { - INT3400_THERMAL_PASSIVE_1, - INT3400_THERMAL_ACTIVE, - INT3400_THERMAL_CRITICAL, - INT3400_THERMAL_MAXIMUM_UUID, -}; - -static char *int3400_thermal_uuids[INT3400_THERMAL_MAXIMUM_UUID] = { - "42A441D6-AE6A-462b-A84B-4A8CE79027D3", - "3A95C389-E4B8-4629-A526-C52C88626BAE", - "97C68AE7-15FA-499c-B8C9-5DA81D606E0A", -}; - -struct int3400_thermal_priv { - struct acpi_device *adev; - struct thermal_zone_device *thermal; - int mode; - int art_count; - struct art *arts; - int trt_count; - struct trt *trts; - u8 uuid_bitmap; - int rel_misc_dev_res; - int current_uuid_index; -}; - -static ssize_t available_uuids_show(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct platform_device *pdev = to_platform_device(dev); - struct int3400_thermal_priv *priv = platform_get_drvdata(pdev); - int i; - int length = 0; - - for (i = 0; i < INT3400_THERMAL_MAXIMUM_UUID; i++) { - if (priv->uuid_bitmap & (1 << i)) - if (PAGE_SIZE - length > 0) - length += snprintf(&buf[length], - PAGE_SIZE - length, - "%s\n", - int3400_thermal_uuids[i]); - } - - return length; -} - -static ssize_t current_uuid_show(struct device *dev, - struct device_attribute *devattr, char *buf) -{ - struct platform_device *pdev = to_platform_device(dev); - struct int3400_thermal_priv *priv = platform_get_drvdata(pdev); - - if (priv->uuid_bitmap & (1 << priv->current_uuid_index)) - return sprintf(buf, "%s\n", - int3400_thermal_uuids[priv->current_uuid_index]); - else - return sprintf(buf, "INVALID\n"); -} - -static ssize_t current_uuid_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) -{ - struct platform_device *pdev = to_platform_device(dev); - struct int3400_thermal_priv *priv = platform_get_drvdata(pdev); - int i; - - for (i = 0; i < INT3400_THERMAL_MAXIMUM_UUID; ++i) { - if ((priv->uuid_bitmap & (1 << i)) && - !(strncmp(buf, int3400_thermal_uuids[i], - sizeof(int3400_thermal_uuids[i]) - 1))) { - priv->current_uuid_index = i; - return count; - } - } - - return -EINVAL; -} - -static DEVICE_ATTR_RW(current_uuid); -static DEVICE_ATTR_RO(available_uuids); -static struct attribute *uuid_attrs[] = { - &dev_attr_available_uuids.attr, - &dev_attr_current_uuid.attr, - NULL -}; - -static struct attribute_group uuid_attribute_group = { - .attrs = uuid_attrs, - .name = "uuids" -}; - -static int int3400_thermal_get_uuids(struct int3400_thermal_priv *priv) -{ - struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL}; - union acpi_object *obja, *objb; - int i, j; - int result = 0; - acpi_status status; - - status = acpi_evaluate_object(priv->adev->handle, "IDSP", NULL, &buf); - if (ACPI_FAILURE(status)) - return -ENODEV; - - obja = (union acpi_object *)buf.pointer; - if (obja->type != ACPI_TYPE_PACKAGE) { - result = -EINVAL; - goto end; - } - - for (i = 0; i < obja->package.count; i++) { - objb = &obja->package.elements[i]; - if (objb->type != ACPI_TYPE_BUFFER) { - result = -EINVAL; - goto end; - } - - /* UUID must be 16 bytes */ - if (objb->buffer.length != 16) { - result = -EINVAL; - goto end; - } - - for (j = 0; j < INT3400_THERMAL_MAXIMUM_UUID; j++) { - guid_t guid; - - guid_parse(int3400_thermal_uuids[j], &guid); - if (guid_equal((guid_t *)objb->buffer.pointer, &guid)) { - priv->uuid_bitmap |= (1 << j); - break; - } - } - } - -end: - kfree(buf.pointer); - return result; -} - -static int int3400_thermal_run_osc(acpi_handle handle, - enum int3400_thermal_uuid uuid, bool enable) -{ - u32 ret, buf[2]; - acpi_status status; - int result = 0; - struct acpi_osc_context context = { - .uuid_str = int3400_thermal_uuids[uuid], - .rev = 1, - .cap.length = 8, - }; - - buf[OSC_QUERY_DWORD] = 0; - buf[OSC_SUPPORT_DWORD] = enable; - - context.cap.pointer = buf; - - status = acpi_run_osc(handle, &context); - if (ACPI_SUCCESS(status)) { - ret = *((u32 *)(context.ret.pointer + 4)); - if (ret != enable) - result = -EPERM; - } else - result = -EPERM; - - kfree(context.ret.pointer); - return result; -} - -static int int3400_thermal_get_temp(struct thermal_zone_device *thermal, - int *temp) -{ - *temp = 20 * 1000; /* faked temp sensor with 20C */ - return 0; -} - -static int int3400_thermal_get_mode(struct thermal_zone_device *thermal, - enum thermal_device_mode *mode) -{ - struct int3400_thermal_priv *priv = thermal->devdata; - - if (!priv) - return -EINVAL; - - *mode = priv->mode; - - return 0; -} - -static int int3400_thermal_set_mode(struct thermal_zone_device *thermal, - enum thermal_device_mode mode) -{ - struct int3400_thermal_priv *priv = thermal->devdata; - bool enable; - int result = 0; - - if (!priv) - return -EINVAL; - - if (mode == THERMAL_DEVICE_ENABLED) - enable = true; - else if (mode == THERMAL_DEVICE_DISABLED) - enable = false; - else - return -EINVAL; - - if (enable != priv->mode) { - priv->mode = enable; - result = int3400_thermal_run_osc(priv->adev->handle, - priv->current_uuid_index, - enable); - } - return result; -} - -static struct thermal_zone_device_ops int3400_thermal_ops = { - .get_temp = int3400_thermal_get_temp, -}; - -static struct thermal_zone_params int3400_thermal_params = { - .governor_name = "user_space", - .no_hwmon = true, -}; - -static int int3400_thermal_probe(struct platform_device *pdev) -{ - struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); - struct int3400_thermal_priv *priv; - int result; - - if (!adev) - return -ENODEV; - - priv = kzalloc(sizeof(struct int3400_thermal_priv), GFP_KERNEL); - if (!priv) - return -ENOMEM; - - priv->adev = adev; - - result = int3400_thermal_get_uuids(priv); - if (result) - goto free_priv; - - result = acpi_parse_art(priv->adev->handle, &priv->art_count, - &priv->arts, true); - if (result) - dev_dbg(&pdev->dev, "_ART table parsing error\n"); - - result = acpi_parse_trt(priv->adev->handle, &priv->trt_count, - &priv->trts, true); - if (result) - dev_dbg(&pdev->dev, "_TRT table parsing error\n"); - - platform_set_drvdata(pdev, priv); - - if (priv->uuid_bitmap & 1 << INT3400_THERMAL_PASSIVE_1) { - int3400_thermal_ops.get_mode = int3400_thermal_get_mode; - int3400_thermal_ops.set_mode = int3400_thermal_set_mode; - } - priv->thermal = thermal_zone_device_register("INT3400 Thermal", 0, 0, - priv, &int3400_thermal_ops, - &int3400_thermal_params, 0, 0); - if (IS_ERR(priv->thermal)) { - result = PTR_ERR(priv->thermal); - goto free_art_trt; - } - - priv->rel_misc_dev_res = acpi_thermal_rel_misc_device_add( - priv->adev->handle); - - result = sysfs_create_group(&pdev->dev.kobj, &uuid_attribute_group); - if (result) - goto free_zone; - - return 0; - -free_zone: - thermal_zone_device_unregister(priv->thermal); -free_art_trt: - kfree(priv->trts); - kfree(priv->arts); -free_priv: - kfree(priv); - return result; -} - -static int int3400_thermal_remove(struct platform_device *pdev) -{ - struct int3400_thermal_priv *priv = platform_get_drvdata(pdev); - - if (!priv->rel_misc_dev_res) - acpi_thermal_rel_misc_device_remove(priv->adev->handle); - - sysfs_remove_group(&pdev->dev.kobj, &uuid_attribute_group); - thermal_zone_device_unregister(priv->thermal); - kfree(priv->trts); - kfree(priv->arts); - kfree(priv); - return 0; -} - -static const struct acpi_device_id int3400_thermal_match[] = { - {"INT3400", 0}, - {} -}; - -MODULE_DEVICE_TABLE(acpi, int3400_thermal_match); - -static struct platform_driver int3400_thermal_driver = { - .probe = int3400_thermal_probe, - .remove = int3400_thermal_remove, - .driver = { - .name = "int3400 thermal", - .acpi_match_table = ACPI_PTR(int3400_thermal_match), - }, -}; - -module_platform_driver(int3400_thermal_driver); - -MODULE_DESCRIPTION("INT3400 Thermal driver"); -MODULE_AUTHOR("Zhang Rui <rui.zhang@intel.com>"); -MODULE_LICENSE("GPL"); |
