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Diffstat (limited to 'drivers/hwmon/exynos4_tmu.c')
-rw-r--r--drivers/hwmon/exynos4_tmu.c518
1 files changed, 0 insertions, 518 deletions
diff --git a/drivers/hwmon/exynos4_tmu.c b/drivers/hwmon/exynos4_tmu.c
deleted file mode 100644
index e912059140cd..000000000000
--- a/drivers/hwmon/exynos4_tmu.c
+++ /dev/null
@@ -1,518 +0,0 @@
-/*
- * exynos4_tmu.c - Samsung EXYNOS4 TMU (Thermal Management Unit)
- *
- * Copyright (C) 2011 Samsung Electronics
- * Donggeun Kim <dg77.kim@samsung.com>
- *
- * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
-
-#include <linux/module.h>
-#include <linux/err.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/platform_device.h>
-#include <linux/interrupt.h>
-#include <linux/clk.h>
-#include <linux/workqueue.h>
-#include <linux/sysfs.h>
-#include <linux/kobject.h>
-#include <linux/io.h>
-#include <linux/mutex.h>
-
-#include <linux/hwmon.h>
-#include <linux/hwmon-sysfs.h>
-
-#include <linux/platform_data/exynos4_tmu.h>
-
-#define EXYNOS4_TMU_REG_TRIMINFO 0x0
-#define EXYNOS4_TMU_REG_CONTROL 0x20
-#define EXYNOS4_TMU_REG_STATUS 0x28
-#define EXYNOS4_TMU_REG_CURRENT_TEMP 0x40
-#define EXYNOS4_TMU_REG_THRESHOLD_TEMP 0x44
-#define EXYNOS4_TMU_REG_TRIG_LEVEL0 0x50
-#define EXYNOS4_TMU_REG_TRIG_LEVEL1 0x54
-#define EXYNOS4_TMU_REG_TRIG_LEVEL2 0x58
-#define EXYNOS4_TMU_REG_TRIG_LEVEL3 0x5C
-#define EXYNOS4_TMU_REG_PAST_TEMP0 0x60
-#define EXYNOS4_TMU_REG_PAST_TEMP1 0x64
-#define EXYNOS4_TMU_REG_PAST_TEMP2 0x68
-#define EXYNOS4_TMU_REG_PAST_TEMP3 0x6C
-#define EXYNOS4_TMU_REG_INTEN 0x70
-#define EXYNOS4_TMU_REG_INTSTAT 0x74
-#define EXYNOS4_TMU_REG_INTCLEAR 0x78
-
-#define EXYNOS4_TMU_GAIN_SHIFT 8
-#define EXYNOS4_TMU_REF_VOLTAGE_SHIFT 24
-
-#define EXYNOS4_TMU_TRIM_TEMP_MASK 0xff
-#define EXYNOS4_TMU_CORE_ON 3
-#define EXYNOS4_TMU_CORE_OFF 2
-#define EXYNOS4_TMU_DEF_CODE_TO_TEMP_OFFSET 50
-#define EXYNOS4_TMU_TRIG_LEVEL0_MASK 0x1
-#define EXYNOS4_TMU_TRIG_LEVEL1_MASK 0x10
-#define EXYNOS4_TMU_TRIG_LEVEL2_MASK 0x100
-#define EXYNOS4_TMU_TRIG_LEVEL3_MASK 0x1000
-#define EXYNOS4_TMU_INTCLEAR_VAL 0x1111
-
-struct exynos4_tmu_data {
- struct exynos4_tmu_platform_data *pdata;
- struct device *hwmon_dev;
- struct resource *mem;
- void __iomem *base;
- int irq;
- struct work_struct irq_work;
- struct mutex lock;
- struct clk *clk;
- u8 temp_error1, temp_error2;
-};
-
-/*
- * TMU treats temperature as a mapped temperature code.
- * The temperature is converted differently depending on the calibration type.
- */
-static int temp_to_code(struct exynos4_tmu_data *data, u8 temp)
-{
- struct exynos4_tmu_platform_data *pdata = data->pdata;
- int temp_code;
-
- /* temp should range between 25 and 125 */
- if (temp < 25 || temp > 125) {
- temp_code = -EINVAL;
- goto out;
- }
-
- switch (pdata->cal_type) {
- case TYPE_TWO_POINT_TRIMMING:
- temp_code = (temp - 25) *
- (data->temp_error2 - data->temp_error1) /
- (85 - 25) + data->temp_error1;
- break;
- case TYPE_ONE_POINT_TRIMMING:
- temp_code = temp + data->temp_error1 - 25;
- break;
- default:
- temp_code = temp + EXYNOS4_TMU_DEF_CODE_TO_TEMP_OFFSET;
- break;
- }
-out:
- return temp_code;
-}
-
-/*
- * Calculate a temperature value from a temperature code.
- * The unit of the temperature is degree Celsius.
- */
-static int code_to_temp(struct exynos4_tmu_data *data, u8 temp_code)
-{
- struct exynos4_tmu_platform_data *pdata = data->pdata;
- int temp;
-
- /* temp_code should range between 75 and 175 */
- if (temp_code < 75 || temp_code > 175) {
- temp = -ENODATA;
- goto out;
- }
-
- switch (pdata->cal_type) {
- case TYPE_TWO_POINT_TRIMMING:
- temp = (temp_code - data->temp_error1) * (85 - 25) /
- (data->temp_error2 - data->temp_error1) + 25;
- break;
- case TYPE_ONE_POINT_TRIMMING:
- temp = temp_code - data->temp_error1 + 25;
- break;
- default:
- temp = temp_code - EXYNOS4_TMU_DEF_CODE_TO_TEMP_OFFSET;
- break;
- }
-out:
- return temp;
-}
-
-static int exynos4_tmu_initialize(struct platform_device *pdev)
-{
- struct exynos4_tmu_data *data = platform_get_drvdata(pdev);
- struct exynos4_tmu_platform_data *pdata = data->pdata;
- unsigned int status, trim_info;
- int ret = 0, threshold_code;
-
- mutex_lock(&data->lock);
- clk_enable(data->clk);
-
- status = readb(data->base + EXYNOS4_TMU_REG_STATUS);
- if (!status) {
- ret = -EBUSY;
- goto out;
- }
-
- /* Save trimming info in order to perform calibration */
- trim_info = readl(data->base + EXYNOS4_TMU_REG_TRIMINFO);
- data->temp_error1 = trim_info & EXYNOS4_TMU_TRIM_TEMP_MASK;
- data->temp_error2 = ((trim_info >> 8) & EXYNOS4_TMU_TRIM_TEMP_MASK);
-
- /* Write temperature code for threshold */
- threshold_code = temp_to_code(data, pdata->threshold);
- if (threshold_code < 0) {
- ret = threshold_code;
- goto out;
- }
- writeb(threshold_code,
- data->base + EXYNOS4_TMU_REG_THRESHOLD_TEMP);
-
- writeb(pdata->trigger_levels[0],
- data->base + EXYNOS4_TMU_REG_TRIG_LEVEL0);
- writeb(pdata->trigger_levels[1],
- data->base + EXYNOS4_TMU_REG_TRIG_LEVEL1);
- writeb(pdata->trigger_levels[2],
- data->base + EXYNOS4_TMU_REG_TRIG_LEVEL2);
- writeb(pdata->trigger_levels[3],
- data->base + EXYNOS4_TMU_REG_TRIG_LEVEL3);
-
- writel(EXYNOS4_TMU_INTCLEAR_VAL,
- data->base + EXYNOS4_TMU_REG_INTCLEAR);
-out:
- clk_disable(data->clk);
- mutex_unlock(&data->lock);
-
- return ret;
-}
-
-static void exynos4_tmu_control(struct platform_device *pdev, bool on)
-{
- struct exynos4_tmu_data *data = platform_get_drvdata(pdev);
- struct exynos4_tmu_platform_data *pdata = data->pdata;
- unsigned int con, interrupt_en;
-
- mutex_lock(&data->lock);
- clk_enable(data->clk);
-
- con = pdata->reference_voltage << EXYNOS4_TMU_REF_VOLTAGE_SHIFT |
- pdata->gain << EXYNOS4_TMU_GAIN_SHIFT;
- if (on) {
- con |= EXYNOS4_TMU_CORE_ON;
- interrupt_en = pdata->trigger_level3_en << 12 |
- pdata->trigger_level2_en << 8 |
- pdata->trigger_level1_en << 4 |
- pdata->trigger_level0_en;
- } else {
- con |= EXYNOS4_TMU_CORE_OFF;
- interrupt_en = 0; /* Disable all interrupts */
- }
- writel(interrupt_en, data->base + EXYNOS4_TMU_REG_INTEN);
- writel(con, data->base + EXYNOS4_TMU_REG_CONTROL);
-
- clk_disable(data->clk);
- mutex_unlock(&data->lock);
-}
-
-static int exynos4_tmu_read(struct exynos4_tmu_data *data)
-{
- u8 temp_code;
- int temp;
-
- mutex_lock(&data->lock);
- clk_enable(data->clk);
-
- temp_code = readb(data->base + EXYNOS4_TMU_REG_CURRENT_TEMP);
- temp = code_to_temp(data, temp_code);
-
- clk_disable(data->clk);
- mutex_unlock(&data->lock);
-
- return temp;
-}
-
-static void exynos4_tmu_work(struct work_struct *work)
-{
- struct exynos4_tmu_data *data = container_of(work,
- struct exynos4_tmu_data, irq_work);
-
- mutex_lock(&data->lock);
- clk_enable(data->clk);
-
- writel(EXYNOS4_TMU_INTCLEAR_VAL, data->base + EXYNOS4_TMU_REG_INTCLEAR);
-
- kobject_uevent(&data->hwmon_dev->kobj, KOBJ_CHANGE);
-
- enable_irq(data->irq);
-
- clk_disable(data->clk);
- mutex_unlock(&data->lock);
-}
-
-static irqreturn_t exynos4_tmu_irq(int irq, void *id)
-{
- struct exynos4_tmu_data *data = id;
-
- disable_irq_nosync(irq);
- schedule_work(&data->irq_work);
-
- return IRQ_HANDLED;
-}
-
-static ssize_t exynos4_tmu_show_name(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- return sprintf(buf, "exynos4-tmu\n");
-}
-
-static ssize_t exynos4_tmu_show_temp(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct exynos4_tmu_data *data = dev_get_drvdata(dev);
- int ret;
-
- ret = exynos4_tmu_read(data);
- if (ret < 0)
- return ret;
-
- /* convert from degree Celsius to millidegree Celsius */
- return sprintf(buf, "%d\n", ret * 1000);
-}
-
-static ssize_t exynos4_tmu_show_alarm(struct device *dev,
- struct device_attribute *devattr, char *buf)
-{
- struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
- struct exynos4_tmu_data *data = dev_get_drvdata(dev);
- struct exynos4_tmu_platform_data *pdata = data->pdata;
- int temp;
- unsigned int trigger_level;
-
- temp = exynos4_tmu_read(data);
- if (temp < 0)
- return temp;
-
- trigger_level = pdata->threshold + pdata->trigger_levels[attr->index];
-
- return sprintf(buf, "%d\n", !!(temp > trigger_level));
-}
-
-static ssize_t exynos4_tmu_show_level(struct device *dev,
- struct device_attribute *devattr, char *buf)
-{
- struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
- struct exynos4_tmu_data *data = dev_get_drvdata(dev);
- struct exynos4_tmu_platform_data *pdata = data->pdata;
- unsigned int temp = pdata->threshold +
- pdata->trigger_levels[attr->index];
-
- return sprintf(buf, "%u\n", temp * 1000);
-}
-
-static DEVICE_ATTR(name, S_IRUGO, exynos4_tmu_show_name, NULL);
-static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, exynos4_tmu_show_temp, NULL, 0);
-
-static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO,
- exynos4_tmu_show_alarm, NULL, 1);
-static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO,
- exynos4_tmu_show_alarm, NULL, 2);
-static SENSOR_DEVICE_ATTR(temp1_emergency_alarm, S_IRUGO,
- exynos4_tmu_show_alarm, NULL, 3);
-
-static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, exynos4_tmu_show_level, NULL, 1);
-static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, exynos4_tmu_show_level, NULL, 2);
-static SENSOR_DEVICE_ATTR(temp1_emergency, S_IRUGO,
- exynos4_tmu_show_level, NULL, 3);
-
-static struct attribute *exynos4_tmu_attributes[] = {
- &dev_attr_name.attr,
- &sensor_dev_attr_temp1_input.dev_attr.attr,
- &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
- &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
- &sensor_dev_attr_temp1_emergency_alarm.dev_attr.attr,
- &sensor_dev_attr_temp1_max.dev_attr.attr,
- &sensor_dev_attr_temp1_crit.dev_attr.attr,
- &sensor_dev_attr_temp1_emergency.dev_attr.attr,
- NULL,
-};
-
-static const struct attribute_group exynos4_tmu_attr_group = {
- .attrs = exynos4_tmu_attributes,
-};
-
-static int __devinit exynos4_tmu_probe(struct platform_device *pdev)
-{
- struct exynos4_tmu_data *data;
- struct exynos4_tmu_platform_data *pdata = pdev->dev.platform_data;
- int ret;
-
- if (!pdata) {
- dev_err(&pdev->dev, "No platform init data supplied.\n");
- return -ENODEV;
- }
-
- data = kzalloc(sizeof(struct exynos4_tmu_data), GFP_KERNEL);
- if (!data) {
- dev_err(&pdev->dev, "Failed to allocate driver structure\n");
- return -ENOMEM;
- }
-
- data->irq = platform_get_irq(pdev, 0);
- if (data->irq < 0) {
- ret = data->irq;
- dev_err(&pdev->dev, "Failed to get platform irq\n");
- goto err_free;
- }
-
- INIT_WORK(&data->irq_work, exynos4_tmu_work);
-
- data->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!data->mem) {
- ret = -ENOENT;
- dev_err(&pdev->dev, "Failed to get platform resource\n");
- goto err_free;
- }
-
- data->mem = request_mem_region(data->mem->start,
- resource_size(data->mem), pdev->name);
- if (!data->mem) {
- ret = -ENODEV;
- dev_err(&pdev->dev, "Failed to request memory region\n");
- goto err_free;
- }
-
- data->base = ioremap(data->mem->start, resource_size(data->mem));
- if (!data->base) {
- ret = -ENODEV;
- dev_err(&pdev->dev, "Failed to ioremap memory\n");
- goto err_mem_region;
- }
-
- ret = request_irq(data->irq, exynos4_tmu_irq,
- IRQF_TRIGGER_RISING,
- "exynos4-tmu", data);
- if (ret) {
- dev_err(&pdev->dev, "Failed to request irq: %d\n", data->irq);
- goto err_io_remap;
- }
-
- data->clk = clk_get(NULL, "tmu_apbif");
- if (IS_ERR(data->clk)) {
- ret = PTR_ERR(data->clk);
- dev_err(&pdev->dev, "Failed to get clock\n");
- goto err_irq;
- }
-
- data->pdata = pdata;
- platform_set_drvdata(pdev, data);
- mutex_init(&data->lock);
-
- ret = exynos4_tmu_initialize(pdev);
- if (ret) {
- dev_err(&pdev->dev, "Failed to initialize TMU\n");
- goto err_clk;
- }
-
- ret = sysfs_create_group(&pdev->dev.kobj, &exynos4_tmu_attr_group);
- if (ret) {
- dev_err(&pdev->dev, "Failed to create sysfs group\n");
- goto err_clk;
- }
-
- data->hwmon_dev = hwmon_device_register(&pdev->dev);
- if (IS_ERR(data->hwmon_dev)) {
- ret = PTR_ERR(data->hwmon_dev);
- dev_err(&pdev->dev, "Failed to register hwmon device\n");
- goto err_create_group;
- }
-
- exynos4_tmu_control(pdev, true);
-
- return 0;
-
-err_create_group:
- sysfs_remove_group(&pdev->dev.kobj, &exynos4_tmu_attr_group);
-err_clk:
- platform_set_drvdata(pdev, NULL);
- clk_put(data->clk);
-err_irq:
- free_irq(data->irq, data);
-err_io_remap:
- iounmap(data->base);
-err_mem_region:
- release_mem_region(data->mem->start, resource_size(data->mem));
-err_free:
- kfree(data);
-
- return ret;
-}
-
-static int __devexit exynos4_tmu_remove(struct platform_device *pdev)
-{
- struct exynos4_tmu_data *data = platform_get_drvdata(pdev);
-
- exynos4_tmu_control(pdev, false);
-
- hwmon_device_unregister(data->hwmon_dev);
- sysfs_remove_group(&pdev->dev.kobj, &exynos4_tmu_attr_group);
-
- clk_put(data->clk);
-
- free_irq(data->irq, data);
-
- iounmap(data->base);
- release_mem_region(data->mem->start, resource_size(data->mem));
-
- platform_set_drvdata(pdev, NULL);
-
- kfree(data);
-
- return 0;
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int exynos4_tmu_suspend(struct device *dev)
-{
- exynos4_tmu_control(to_platform_device(dev), false);
-
- return 0;
-}
-
-static int exynos4_tmu_resume(struct device *dev)
-{
- struct platform_device *pdev = to_platform_device(dev);
-
- exynos4_tmu_initialize(pdev);
- exynos4_tmu_control(pdev, true);
-
- return 0;
-}
-
-static SIMPLE_DEV_PM_OPS(exynos4_tmu_pm,
- exynos4_tmu_suspend, exynos4_tmu_resume);
-#define EXYNOS4_TMU_PM &exynos4_tmu_pm
-#else
-#define EXYNOS4_TMU_PM NULL
-#endif
-
-static struct platform_driver exynos4_tmu_driver = {
- .driver = {
- .name = "exynos4-tmu",
- .owner = THIS_MODULE,
- .pm = EXYNOS4_TMU_PM,
- },
- .probe = exynos4_tmu_probe,
- .remove = __devexit_p(exynos4_tmu_remove),
-};
-
-module_platform_driver(exynos4_tmu_driver);
-
-MODULE_DESCRIPTION("EXYNOS4 TMU Driver");
-MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:exynos4-tmu");