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@@ -0,0 +1,477 @@
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+/*
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+ * ACPI INT3403 thermal driver
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+ * Copyright (c) 2013, Intel Corporation.
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+ *
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms and conditions of the GNU General Public License,
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+ * version 2, as published by the Free Software Foundation.
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+ *
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+ * This program is distributed in the hope it will be useful, but WITHOUT
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+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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+ * more details.
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+ */
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+
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+#include <linux/kernel.h>
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+#include <linux/module.h>
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+#include <linux/init.h>
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+#include <linux/types.h>
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+#include <linux/acpi.h>
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+#include <linux/thermal.h>
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+#include <linux/platform_device.h>
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+
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+#define INT3403_TYPE_SENSOR 0x03
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+#define INT3403_TYPE_CHARGER 0x0B
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+#define INT3403_TYPE_BATTERY 0x0C
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+#define INT3403_PERF_CHANGED_EVENT 0x80
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+#define INT3403_THERMAL_EVENT 0x90
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+
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+#define DECI_KELVIN_TO_MILLI_CELSIUS(t, off) (((t) - (off)) * 100)
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+#define KELVIN_OFFSET 2732
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+#define MILLI_CELSIUS_TO_DECI_KELVIN(t, off) (((t) / 100) + (off))
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+
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+struct int3403_sensor {
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+ struct thermal_zone_device *tzone;
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+ unsigned long *thresholds;
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+ unsigned long crit_temp;
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+ int crit_trip_id;
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+ unsigned long psv_temp;
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+ int psv_trip_id;
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+
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+};
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+
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+struct int3403_performance_state {
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+ u64 performance;
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+ u64 power;
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+ u64 latency;
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+ u64 linear;
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+ u64 control;
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+ u64 raw_performace;
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+ char *raw_unit;
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+ int reserved;
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+};
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+
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+struct int3403_cdev {
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+ struct thermal_cooling_device *cdev;
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+ unsigned long max_state;
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+};
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+
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+struct int3403_priv {
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+ struct platform_device *pdev;
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+ struct acpi_device *adev;
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+ unsigned long long type;
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+ void *priv;
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+};
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+
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+static int sys_get_curr_temp(struct thermal_zone_device *tzone,
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+ unsigned long *temp)
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+{
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+ struct int3403_priv *priv = tzone->devdata;
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+ struct acpi_device *device = priv->adev;
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+ unsigned long long tmp;
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+ acpi_status status;
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+
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+ status = acpi_evaluate_integer(device->handle, "_TMP", NULL, &tmp);
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+ if (ACPI_FAILURE(status))
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+ return -EIO;
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+
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+ *temp = DECI_KELVIN_TO_MILLI_CELSIUS(tmp, KELVIN_OFFSET);
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+
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+ return 0;
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+}
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+
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+static int sys_get_trip_hyst(struct thermal_zone_device *tzone,
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+ int trip, unsigned long *temp)
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+{
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+ struct int3403_priv *priv = tzone->devdata;
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+ struct acpi_device *device = priv->adev;
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+ unsigned long long hyst;
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+ acpi_status status;
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+
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+ status = acpi_evaluate_integer(device->handle, "GTSH", NULL, &hyst);
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+ if (ACPI_FAILURE(status))
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+ return -EIO;
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+
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+ *temp = DECI_KELVIN_TO_MILLI_CELSIUS(hyst, KELVIN_OFFSET);
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+
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+ return 0;
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+}
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+
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+static int sys_get_trip_temp(struct thermal_zone_device *tzone,
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+ int trip, unsigned long *temp)
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+{
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+ struct int3403_priv *priv = tzone->devdata;
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+ struct int3403_sensor *obj = priv->priv;
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+
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+ if (priv->type != INT3403_TYPE_SENSOR || !obj)
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+ return -EINVAL;
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+
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+ if (trip == obj->crit_trip_id)
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+ *temp = obj->crit_temp;
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+ else if (trip == obj->psv_trip_id)
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+ *temp = obj->psv_temp;
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+ else {
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+ /*
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+ * get_trip_temp is a mandatory callback but
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+ * PATx method doesn't return any value, so return
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+ * cached value, which was last set from user space
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+ */
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+ *temp = obj->thresholds[trip];
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+ }
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+
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+ return 0;
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+}
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+
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+static int sys_get_trip_type(struct thermal_zone_device *thermal,
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+ int trip, enum thermal_trip_type *type)
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+{
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+ struct int3403_priv *priv = thermal->devdata;
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+ struct int3403_sensor *obj = priv->priv;
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+
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+ /* Mandatory callback, may not mean much here */
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+ if (trip == obj->crit_trip_id)
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+ *type = THERMAL_TRIP_CRITICAL;
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+ else
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+ *type = THERMAL_TRIP_PASSIVE;
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+
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+ return 0;
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+}
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+
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+int sys_set_trip_temp(struct thermal_zone_device *tzone, int trip,
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+ unsigned long temp)
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+{
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+ struct int3403_priv *priv = tzone->devdata;
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+ struct acpi_device *device = priv->adev;
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+ struct int3403_sensor *obj = priv->priv;
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+ acpi_status status;
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+ char name[10];
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+ int ret = 0;
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+
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+ snprintf(name, sizeof(name), "PAT%d", trip);
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+ if (acpi_has_method(device->handle, name)) {
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+ status = acpi_execute_simple_method(device->handle, name,
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+ MILLI_CELSIUS_TO_DECI_KELVIN(temp,
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+ KELVIN_OFFSET));
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+ if (ACPI_FAILURE(status))
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+ ret = -EIO;
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+ else
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+ obj->thresholds[trip] = temp;
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+ } else {
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+ ret = -EIO;
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+ dev_err(&device->dev, "sys_set_trip_temp: method not found\n");
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+ }
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+
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+ return ret;
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+}
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+
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+static struct thermal_zone_device_ops tzone_ops = {
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+ .get_temp = sys_get_curr_temp,
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+ .get_trip_temp = sys_get_trip_temp,
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+ .get_trip_type = sys_get_trip_type,
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+ .set_trip_temp = sys_set_trip_temp,
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+ .get_trip_hyst = sys_get_trip_hyst,
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+};
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+
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+static struct thermal_zone_params int3403_thermal_params = {
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+ .governor_name = "user_space",
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+ .no_hwmon = true,
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+};
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+
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+static void int3403_notify(acpi_handle handle,
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+ u32 event, void *data)
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+{
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+ struct int3403_priv *priv = data;
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+ struct int3403_sensor *obj;
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+
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+ if (!priv)
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+ return;
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+
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+ obj = priv->priv;
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+ if (priv->type != INT3403_TYPE_SENSOR || !obj)
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+ return;
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+
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+ switch (event) {
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+ case INT3403_PERF_CHANGED_EVENT:
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+ break;
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+ case INT3403_THERMAL_EVENT:
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+ thermal_zone_device_update(obj->tzone);
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+ break;
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+ default:
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+ dev_err(&priv->pdev->dev, "Unsupported event [0x%x]\n", event);
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+ break;
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+ }
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+}
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+
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+static int sys_get_trip_crt(struct acpi_device *device, unsigned long *temp)
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+{
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+ unsigned long long crt;
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+ acpi_status status;
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+
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+ status = acpi_evaluate_integer(device->handle, "_CRT", NULL, &crt);
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+ if (ACPI_FAILURE(status))
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+ return -EIO;
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+
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+ *temp = DECI_KELVIN_TO_MILLI_CELSIUS(crt, KELVIN_OFFSET);
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+
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+ return 0;
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+}
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+
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+static int sys_get_trip_psv(struct acpi_device *device, unsigned long *temp)
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+{
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+ unsigned long long psv;
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+ acpi_status status;
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+
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+ status = acpi_evaluate_integer(device->handle, "_PSV", NULL, &psv);
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+ if (ACPI_FAILURE(status))
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+ return -EIO;
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+
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+ *temp = DECI_KELVIN_TO_MILLI_CELSIUS(psv, KELVIN_OFFSET);
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+
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+ return 0;
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+}
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+
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+static int int3403_sensor_add(struct int3403_priv *priv)
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+{
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+ int result = 0;
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+ acpi_status status;
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+ struct int3403_sensor *obj;
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+ unsigned long long trip_cnt;
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+ int trip_mask = 0;
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+
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+ obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
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+ if (!obj)
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+ return -ENOMEM;
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+
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+ priv->priv = obj;
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+
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+ status = acpi_evaluate_integer(priv->adev->handle, "PATC", NULL,
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+ &trip_cnt);
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+ if (ACPI_FAILURE(status))
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+ trip_cnt = 0;
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+
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+ if (trip_cnt) {
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+ /* We have to cache, thresholds can't be readback */
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+ obj->thresholds = devm_kzalloc(&priv->pdev->dev,
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+ sizeof(*obj->thresholds) * trip_cnt,
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+ GFP_KERNEL);
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+ if (!obj->thresholds) {
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+ result = -ENOMEM;
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+ goto err_free_obj;
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+ }
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+ trip_mask = BIT(trip_cnt) - 1;
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+ }
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+
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+ obj->psv_trip_id = -1;
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+ if (!sys_get_trip_psv(priv->adev, &obj->psv_temp))
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+ obj->psv_trip_id = trip_cnt++;
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+
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+ obj->crit_trip_id = -1;
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+ if (!sys_get_trip_crt(priv->adev, &obj->crit_temp))
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+ obj->crit_trip_id = trip_cnt++;
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+
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+ obj->tzone = thermal_zone_device_register(acpi_device_bid(priv->adev),
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+ trip_cnt, trip_mask, priv, &tzone_ops,
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+ &int3403_thermal_params, 0, 0);
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+ if (IS_ERR(obj->tzone)) {
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+ result = PTR_ERR(obj->tzone);
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+ obj->tzone = NULL;
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+ goto err_free_obj;
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+ }
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+
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+ result = acpi_install_notify_handler(priv->adev->handle,
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+ ACPI_DEVICE_NOTIFY, int3403_notify,
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+ (void *)priv);
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+ if (result)
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+ goto err_free_obj;
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+
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+ return 0;
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+
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+ err_free_obj:
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+ if (obj->tzone)
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+ thermal_zone_device_unregister(obj->tzone);
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+ return result;
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+}
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+
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+static int int3403_sensor_remove(struct int3403_priv *priv)
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+{
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+ struct int3403_sensor *obj = priv->priv;
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+
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+ thermal_zone_device_unregister(obj->tzone);
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+ return 0;
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+}
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+
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+/* INT3403 Cooling devices */
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+static int int3403_get_max_state(struct thermal_cooling_device *cdev,
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+ unsigned long *state)
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+{
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+ struct int3403_priv *priv = cdev->devdata;
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+ struct int3403_cdev *obj = priv->priv;
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+
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+ *state = obj->max_state;
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+ return 0;
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+}
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+
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+static int int3403_get_cur_state(struct thermal_cooling_device *cdev,
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+ unsigned long *state)
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+{
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+ struct int3403_priv *priv = cdev->devdata;
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+ unsigned long long level;
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+ acpi_status status;
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+
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+ status = acpi_evaluate_integer(priv->adev->handle, "PPPC", NULL, &level);
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+ if (ACPI_SUCCESS(status)) {
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+ *state = level;
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+ return 0;
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+ } else
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+ return -EINVAL;
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+}
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+
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+static int
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+int3403_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
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+{
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+ struct int3403_priv *priv = cdev->devdata;
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+ acpi_status status;
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+
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+ status = acpi_execute_simple_method(priv->adev->handle, "SPPC", state);
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+ if (ACPI_SUCCESS(status))
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+ return 0;
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+ else
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+ return -EINVAL;
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+}
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+
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+static const struct thermal_cooling_device_ops int3403_cooling_ops = {
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+ .get_max_state = int3403_get_max_state,
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+ .get_cur_state = int3403_get_cur_state,
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+ .set_cur_state = int3403_set_cur_state,
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+};
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+
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+static int int3403_cdev_add(struct int3403_priv *priv)
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+{
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+ int result = 0;
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+ acpi_status status;
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+ struct int3403_cdev *obj;
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+ struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
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+ union acpi_object *p;
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+
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+ obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
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+ if (!obj)
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+ return -ENOMEM;
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+
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+ status = acpi_evaluate_object(priv->adev->handle, "PPSS", NULL, &buf);
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+ if (ACPI_FAILURE(status))
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+ return -ENODEV;
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+
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+ p = buf.pointer;
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+ if (!p || (p->type != ACPI_TYPE_PACKAGE)) {
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+ printk(KERN_WARNING "Invalid PPSS data\n");
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+ return -EFAULT;
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+ }
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+
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+ obj->max_state = p->package.count - 1;
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+ obj->cdev =
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+ thermal_cooling_device_register(acpi_device_bid(priv->adev),
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+ priv, &int3403_cooling_ops);
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+ if (IS_ERR(obj->cdev))
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+ result = PTR_ERR(obj->cdev);
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+
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+ priv->priv = obj;
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+
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+ /* TODO: add ACPI notification support */
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+
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+ return result;
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+}
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+
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+static int int3403_cdev_remove(struct int3403_priv *priv)
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+{
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+ struct int3403_cdev *obj = priv->priv;
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+
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+ thermal_cooling_device_unregister(obj->cdev);
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+ return 0;
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+}
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+
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+static int int3403_add(struct platform_device *pdev)
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+{
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+ struct int3403_priv *priv;
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+ int result = 0;
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+ acpi_status status;
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+
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+ priv = devm_kzalloc(&pdev->dev, sizeof(struct int3403_priv),
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+ GFP_KERNEL);
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+ if (!priv)
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+ return -ENOMEM;
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+
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+ priv->pdev = pdev;
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+ priv->adev = ACPI_COMPANION(&(pdev->dev));
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+ if (!priv->adev) {
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+ result = -EINVAL;
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+ goto err;
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+ }
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+
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+ status = acpi_evaluate_integer(priv->adev->handle, "PTYP",
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+ NULL, &priv->type);
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+ if (ACPI_FAILURE(status)) {
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+ result = -EINVAL;
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+ goto err;
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+ }
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+
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+ platform_set_drvdata(pdev, priv);
|
|
|
+ switch (priv->type) {
|
|
|
+ case INT3403_TYPE_SENSOR:
|
|
|
+ result = int3403_sensor_add(priv);
|
|
|
+ break;
|
|
|
+ case INT3403_TYPE_CHARGER:
|
|
|
+ case INT3403_TYPE_BATTERY:
|
|
|
+ result = int3403_cdev_add(priv);
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ result = -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (result)
|
|
|
+ goto err;
|
|
|
+ return result;
|
|
|
+
|
|
|
+err:
|
|
|
+ return result;
|
|
|
+}
|
|
|
+
|
|
|
+static int int3403_remove(struct platform_device *pdev)
|
|
|
+{
|
|
|
+ struct int3403_priv *priv = platform_get_drvdata(pdev);
|
|
|
+
|
|
|
+ switch (priv->type) {
|
|
|
+ case INT3403_TYPE_SENSOR:
|
|
|
+ int3403_sensor_remove(priv);
|
|
|
+ break;
|
|
|
+ case INT3403_TYPE_CHARGER:
|
|
|
+ case INT3403_TYPE_BATTERY:
|
|
|
+ int3403_cdev_remove(priv);
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static const struct acpi_device_id int3403_device_ids[] = {
|
|
|
+ {"INT3403", 0},
|
|
|
+ {"", 0},
|
|
|
+};
|
|
|
+MODULE_DEVICE_TABLE(acpi, int3403_device_ids);
|
|
|
+
|
|
|
+static struct platform_driver int3403_driver = {
|
|
|
+ .probe = int3403_add,
|
|
|
+ .remove = int3403_remove,
|
|
|
+ .driver = {
|
|
|
+ .name = "int3403 thermal",
|
|
|
+ .owner = THIS_MODULE,
|
|
|
+ .acpi_match_table = int3403_device_ids,
|
|
|
+ },
|
|
|
+};
|
|
|
+
|
|
|
+module_platform_driver(int3403_driver);
|
|
|
+
|
|
|
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
|
|
|
+MODULE_LICENSE("GPL v2");
|
|
|
+MODULE_DESCRIPTION("ACPI INT3403 thermal driver");
|
Lan Tianyu