10 files changed, 170 insertions, 4 deletions

diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 5b7a1a4692a0..4cab0c6397e3 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -61,6 +61,7 @@ config DRM_RADEON
         select DRM_KMS_HELPER
         select DRM_TTM
         select POWER_SUPPLY
+        select HWMON
         help
           Choose this option if you have an ATI Radeon graphics card.  There
           are both PCI and AGP versions.  You don't need to choose this to
diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index 057192acdd36..1b7da39cc587 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -39,6 +39,23 @@
 static void evergreen_gpu_init(struct radeon_device *rdev);
 void evergreen_fini(struct radeon_device *rdev);
 
+/* get temperature in millidegrees */
+u32 evergreen_get_temp(struct radeon_device *rdev)
+{
+        u32 temp = (RREG32(CG_MULT_THERMAL_STATUS) & ASIC_T_MASK) >>
+                ASIC_T_SHIFT;
+        u32 actual_temp = 0;
+
+        if ((temp >> 10) & 1)
+                actual_temp = 0;
+        else if ((temp >> 9) & 1)
+                actual_temp = 255;
+        else
+                actual_temp = (temp >> 1) & 0xff;
+
+        return actual_temp * 1000;
+}
+
 void evergreen_pm_misc(struct radeon_device *rdev)
 {
         int req_ps_idx = rdev->pm.requested_power_state_index;
diff --git a/drivers/gpu/drm/radeon/evergreend.h b/drivers/gpu/drm/radeon/evergreend.h
index a1cd621780e2..9b7532dd30f7 100644
--- a/drivers/gpu/drm/radeon/evergreend.h
+++ b/drivers/gpu/drm/radeon/evergreend.h
@@ -165,6 +165,11 @@
 #define         SE_DB_BUSY                                      (1 << 30)
 #define         SE_CB_BUSY                                      (1 << 31)
 
+#define CG_MULT_THERMAL_STATUS                          0x740
+#define         ASIC_T(x)                               ((x) << 16)
+#define         ASIC_T_MASK                             0x7FF0000
+#define         ASIC_T_SHIFT                            16
+
 #define HDP_HOST_PATH_CNTL                              0x2C00
 #define HDP_NONSURFACE_BASE                             0x2C04
 #define HDP_NONSURFACE_INFO                             0x2C08
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index a73a6e17588d..15fe6c214034 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -92,6 +92,21 @@ void r600_gpu_init(struct radeon_device *rdev);
 void r600_fini(struct radeon_device *rdev);
 void r600_irq_disable(struct radeon_device *rdev);
 
+/* get temperature in millidegrees */
+u32 rv6xx_get_temp(struct radeon_device *rdev)
+{
+        u32 temp = (RREG32(CG_THERMAL_STATUS) & ASIC_T_MASK) >>
+                ASIC_T_SHIFT;
+        u32 actual_temp = 0;
+
+        if ((temp >> 7) & 1)
+                actual_temp = 0;
+        else
+                actual_temp = (temp >> 1) & 0xff;
+
+        return actual_temp * 1000;
+}
+
 void r600_pm_get_dynpm_state(struct radeon_device *rdev)
 {
         int i;
diff --git a/drivers/gpu/drm/radeon/r600d.h b/drivers/gpu/drm/radeon/r600d.h
index 59c1f8793e60..23205f032872 100644
--- a/drivers/gpu/drm/radeon/r600d.h
+++ b/drivers/gpu/drm/radeon/r600d.h
@@ -239,6 +239,11 @@
 #define GRBM_SOFT_RESET                                 0x8020
 #define         SOFT_RESET_CP                                   (1<<0)
 
+#define CG_THERMAL_STATUS                               0x7F4
+#define         ASIC_T(x)                               ((x) << 0)
+#define         ASIC_T_MASK                             0x1FF
+#define         ASIC_T_SHIFT                            0
+
 #define HDP_HOST_PATH_CNTL                              0x2C00
 #define HDP_NONSURFACE_BASE                             0x2C04
 #define HDP_NONSURFACE_INFO                             0x2C08
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index a5c1a3e9dd39..d4d776d2f1e0 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -178,6 +178,9 @@ void radeon_combios_get_power_modes(struct radeon_device *rdev);
 void radeon_atombios_get_power_modes(struct radeon_device *rdev);
 void radeon_atom_set_voltage(struct radeon_device *rdev, u16 level);
 void rs690_pm_info(struct radeon_device *rdev);
+extern u32 rv6xx_get_temp(struct radeon_device *rdev);
+extern u32 rv770_get_temp(struct radeon_device *rdev);
+extern u32 evergreen_get_temp(struct radeon_device *rdev);
 
 /*
  * Fences.
@@ -670,6 +673,13 @@ struct radeon_pm_profile {
         int dpms_on_cm_idx;
 };
 
+enum radeon_int_thermal_type {
+        THERMAL_TYPE_NONE,
+        THERMAL_TYPE_RV6XX,
+        THERMAL_TYPE_RV770,
+        THERMAL_TYPE_EVERGREEN,
+};
+
 struct radeon_voltage {
         enum radeon_voltage_type type;
         /* gpio voltage */
@@ -765,6 +775,9 @@ struct radeon_pm {
         enum radeon_pm_profile_type profile;
         int                     profile_index;
         struct radeon_pm_profile profiles[PM_PROFILE_MAX];
+        /* internal thermal controller on rv6xx+ */
+        enum radeon_int_thermal_type int_thermal_type;
+        struct device           *int_hwmon_dev;
 };
 
 
diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
index 99bd8a9c56b3..5dd86b95b992 100644
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -1773,14 +1773,22 @@ void radeon_atombios_get_power_modes(struct radeon_device *rdev)
                         }
 
                         /* add the i2c bus for thermal/fan chip */
-                        /* no support for internal controller yet */
                         if (controller->ucType > 0) {
-                                if ((controller->ucType == ATOM_PP_THERMALCONTROLLER_RV6xx) ||
-                                    (controller->ucType == ATOM_PP_THERMALCONTROLLER_RV770) ||
-                                    (controller->ucType == ATOM_PP_THERMALCONTROLLER_EVERGREEN)) {
+                                if (controller->ucType == ATOM_PP_THERMALCONTROLLER_RV6xx) {
                                         DRM_INFO("Internal thermal controller %s fan control\n",
                                                  (controller->ucFanParameters &
                                                   ATOM_PP_FANPARAMETERS_NOFAN) ? "without" : "with");
+                                        rdev->pm.int_thermal_type = THERMAL_TYPE_RV6XX;
+                                } else if (controller->ucType == ATOM_PP_THERMALCONTROLLER_RV770) {
+                                        DRM_INFO("Internal thermal controller %s fan control\n",
+                                                 (controller->ucFanParameters &
+                                                  ATOM_PP_FANPARAMETERS_NOFAN) ? "without" : "with");
+                                        rdev->pm.int_thermal_type = THERMAL_TYPE_RV770;
+                                } else if (controller->ucType == ATOM_PP_THERMALCONTROLLER_EVERGREEN) {
+                                        DRM_INFO("Internal thermal controller %s fan control\n",
+                                                 (controller->ucFanParameters &
+                                                  ATOM_PP_FANPARAMETERS_NOFAN) ? "without" : "with");
+                                        rdev->pm.int_thermal_type = THERMAL_TYPE_EVERGREEN;
                                 } else if ((controller->ucType ==
                                             ATOM_PP_THERMALCONTROLLER_EXTERNAL_GPIO) ||
                                            (controller->ucType ==
diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c
index 115d26b762cc..ed66062ae9d0 100644
--- a/drivers/gpu/drm/radeon/radeon_pm.c
+++ b/drivers/gpu/drm/radeon/radeon_pm.c
@@ -27,6 +27,8 @@
 #include <linux/acpi.h>
 #endif
 #include <linux/power_supply.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
 
 #define RADEON_IDLE_LOOP_MS 100
 #define RADEON_RECLOCK_DELAY_MS 200
@@ -423,6 +425,82 @@ fail:
 static DEVICE_ATTR(power_profile, S_IRUGO | S_IWUSR, radeon_get_pm_profile, radeon_set_pm_profile);
 static DEVICE_ATTR(power_method, S_IRUGO | S_IWUSR, radeon_get_pm_method, radeon_set_pm_method);
 
+static ssize_t radeon_hwmon_show_temp(struct device *dev,
+                                      struct device_attribute *attr,
+                                      char *buf)
+{
+        struct drm_device *ddev = pci_get_drvdata(to_pci_dev(dev));
+        struct radeon_device *rdev = ddev->dev_private;
+        u32 temp;
+
+        switch (rdev->pm.int_thermal_type) {
+        case THERMAL_TYPE_RV6XX:
+                temp = rv6xx_get_temp(rdev);
+                break;
+        case THERMAL_TYPE_RV770:
+                temp = rv770_get_temp(rdev);
+                break;
+        case THERMAL_TYPE_EVERGREEN:
+                temp = evergreen_get_temp(rdev);
+                break;
+        default:
+                temp = 0;
+                break;
+        }
+
+        return snprintf(buf, PAGE_SIZE, "%d\n", temp);
+}
+
+static ssize_t radeon_hwmon_show_name(struct device *dev,
+                                      struct device_attribute *attr,
+                                      char *buf)
+{
+        return sprintf(buf, "radeon\n");
+}
+
+static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, radeon_hwmon_show_temp, NULL, 0);
+static SENSOR_DEVICE_ATTR(name, S_IRUGO, radeon_hwmon_show_name, NULL, 0);
+
+static struct attribute *hwmon_attributes[] = {
+        &sensor_dev_attr_temp1_input.dev_attr.attr,
+        &sensor_dev_attr_name.dev_attr.attr,
+        NULL
+};
+
+static const struct attribute_group hwmon_attrgroup = {
+        .attrs = hwmon_attributes,
+};
+
+static void radeon_hwmon_init(struct radeon_device *rdev)
+{
+        int err;
+
+        rdev->pm.int_hwmon_dev = NULL;
+
+        switch (rdev->pm.int_thermal_type) {
+        case THERMAL_TYPE_RV6XX:
+        case THERMAL_TYPE_RV770:
+        case THERMAL_TYPE_EVERGREEN:
+                rdev->pm.int_hwmon_dev = hwmon_device_register(rdev->dev);
+                dev_set_drvdata(rdev->pm.int_hwmon_dev, rdev->ddev);
+                err = sysfs_create_group(&rdev->pm.int_hwmon_dev->kobj,
+                                         &hwmon_attrgroup);
+                if (err)
+                        DRM_ERROR("Unable to create hwmon sysfs file: %d\n", err);
+                break;
+        default:
+                break;
+        }
+}
+
+static void radeon_hwmon_fini(struct radeon_device *rdev)
+{
+        if (rdev->pm.int_hwmon_dev) {
+                sysfs_remove_group(&rdev->pm.int_hwmon_dev->kobj, &hwmon_attrgroup);
+                hwmon_device_unregister(rdev->pm.int_hwmon_dev);
+        }
+}
+
 void radeon_pm_suspend(struct radeon_device *rdev)
 {
         bool flush_wq = false;
@@ -470,6 +548,7 @@ int radeon_pm_init(struct radeon_device *rdev)
         rdev->pm.dynpm_can_downclock = true;
         rdev->pm.current_sclk = rdev->clock.default_sclk;
         rdev->pm.current_mclk = rdev->clock.default_mclk;
+        rdev->pm.int_thermal_type = THERMAL_TYPE_NONE;
 
         if (rdev->bios) {
                 if (rdev->is_atom_bios)
@@ -480,6 +559,8 @@ int radeon_pm_init(struct radeon_device *rdev)
                 radeon_pm_init_profile(rdev);
         }
 
+        /* set up the internal thermal sensor if applicable */
+        radeon_hwmon_init(rdev);
         if (rdev->pm.num_power_states > 1) {
                 /* where's the best place to put these? */
                 ret = device_create_file(rdev->dev, &dev_attr_power_profile);
@@ -535,6 +616,7 @@ void radeon_pm_fini(struct radeon_device *rdev)
 #endif
         }
 
+        radeon_hwmon_fini(rdev);
         if (rdev->pm.i2c_bus)
                 radeon_i2c_destroy(rdev->pm.i2c_bus);
 }
diff --git a/drivers/gpu/drm/radeon/rv770.c b/drivers/gpu/drm/radeon/rv770.c
index 6a7bf1091971..836c15ab84d1 100644
--- a/drivers/gpu/drm/radeon/rv770.c
+++ b/drivers/gpu/drm/radeon/rv770.c
@@ -42,6 +42,21 @@
 static void rv770_gpu_init(struct radeon_device *rdev);
 void rv770_fini(struct radeon_device *rdev);
 
+/* get temperature in millidegrees */
+u32 rv770_get_temp(struct radeon_device *rdev)
+{
+        u32 temp = (RREG32(CG_MULT_THERMAL_STATUS) & ASIC_T_MASK) >>
+                ASIC_T_SHIFT;
+        u32 actual_temp = 0;
+
+        if ((temp >> 9) & 1)
+                actual_temp = 0;
+        else
+                actual_temp = (temp >> 1) & 0xff;
+
+        return actual_temp * 1000;
+}
+
 void rv770_pm_misc(struct radeon_device *rdev)
 {
         int req_ps_idx = rdev->pm.requested_power_state_index;
diff --git a/drivers/gpu/drm/radeon/rv770d.h b/drivers/gpu/drm/radeon/rv770d.h
index 9506f8cb99e0..fd733f268e3d 100644
--- a/drivers/gpu/drm/radeon/rv770d.h
+++ b/drivers/gpu/drm/radeon/rv770d.h
@@ -122,6 +122,11 @@
 #define         GUI_ACTIVE                                      (1<<31)
 #define GRBM_STATUS2                                    0x8014
 
+#define CG_MULT_THERMAL_STATUS                          0x740
+#define         ASIC_T(x)                               ((x) << 16)
+#define         ASIC_T_MASK                             0x3FF0000
+#define         ASIC_T_SHIFT                            16
+
 #define HDP_HOST_PATH_CNTL                              0x2C00
 #define HDP_NONSURFACE_BASE                             0x2C04
 #define HDP_NONSURFACE_INFO                             0x2C08