1 files changed, 266 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/therm/g84.c b/drivers/gpu/drm/nouveau/nvkm/subdev/therm/g84.c
new file mode 100644
index 000000000000..85b5d0c18c0b
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/therm/g84.c
@@ -0,0 +1,266 @@
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Ben Skeggs
+ * 	    Martin Peres
+ */
+#include "priv.h"
+
+#include <subdev/fuse.h>
+
+struct g84_therm_priv {
+	struct nvkm_therm_priv base;
+};
+
+int
+g84_temp_get(struct nvkm_therm *therm)
+{
+	struct nvkm_fuse *fuse = nvkm_fuse(therm);
+
+	if (nv_ro32(fuse, 0x1a8) == 1)
+		return nv_rd32(therm, 0x20400);
+	else
+		return -ENODEV;
+}
+
+void
+g84_sensor_setup(struct nvkm_therm *therm)
+{
+	struct nvkm_fuse *fuse = nvkm_fuse(therm);
+
+	/* enable temperature reading for cards with insane defaults */
+	if (nv_ro32(fuse, 0x1a8) == 1) {
+		nv_mask(therm, 0x20008, 0x80008000, 0x80000000);
+		nv_mask(therm, 0x2000c, 0x80000003, 0x00000000);
+		mdelay(20); /* wait for the temperature to stabilize */
+	}
+}
+
+static void
+g84_therm_program_alarms(struct nvkm_therm *therm)
+{
+	struct nvkm_therm_priv *priv = (void *)therm;
+	struct nvbios_therm_sensor *sensor = &priv->bios_sensor;
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->sensor.alarm_program_lock, flags);
+
+	/* enable RISING and FALLING IRQs for shutdown, THRS 0, 1, 2 and 4 */
+	nv_wr32(therm, 0x20000, 0x000003ff);
+
+	/* shutdown: The computer should be shutdown when reached */
+	nv_wr32(therm, 0x20484, sensor->thrs_shutdown.hysteresis);
+	nv_wr32(therm, 0x20480, sensor->thrs_shutdown.temp);
+
+	/* THRS_1 : fan boost*/
+	nv_wr32(therm, 0x204c4, sensor->thrs_fan_boost.temp);
+
+	/* THRS_2 : critical */
+	nv_wr32(therm, 0x204c0, sensor->thrs_critical.temp);
+
+	/* THRS_4 : down clock */
+	nv_wr32(therm, 0x20414, sensor->thrs_down_clock.temp);
+	spin_unlock_irqrestore(&priv->sensor.alarm_program_lock, flags);
+
+	nv_debug(therm,
+		 "Programmed thresholds [ %d(%d), %d(%d), %d(%d), %d(%d) ]\n",
+		 sensor->thrs_fan_boost.temp, sensor->thrs_fan_boost.hysteresis,
+		 sensor->thrs_down_clock.temp,
+		 sensor->thrs_down_clock.hysteresis,
+		 sensor->thrs_critical.temp, sensor->thrs_critical.hysteresis,
+		 sensor->thrs_shutdown.temp, sensor->thrs_shutdown.hysteresis);
+
+}
+
+/* must be called with alarm_program_lock taken ! */
+static void
+g84_therm_threshold_hyst_emulation(struct nvkm_therm *therm,
+				   uint32_t thrs_reg, u8 status_bit,
+				   const struct nvbios_therm_threshold *thrs,
+				   enum nvkm_therm_thrs thrs_name)
+{
+	enum nvkm_therm_thrs_direction direction;
+	enum nvkm_therm_thrs_state prev_state, new_state;
+	int temp, cur;
+
+	prev_state = nvkm_therm_sensor_get_threshold_state(therm, thrs_name);
+	temp = nv_rd32(therm, thrs_reg);
+
+	/* program the next threshold */
+	if (temp == thrs->temp) {
+		nv_wr32(therm, thrs_reg, thrs->temp - thrs->hysteresis);
+		new_state = NVKM_THERM_THRS_HIGHER;
+	} else {
+		nv_wr32(therm, thrs_reg, thrs->temp);
+		new_state = NVKM_THERM_THRS_LOWER;
+	}
+
+	/* fix the state (in case someone reprogrammed the alarms) */
+	cur = therm->temp_get(therm);
+	if (new_state == NVKM_THERM_THRS_LOWER && cur > thrs->temp)
+		new_state = NVKM_THERM_THRS_HIGHER;
+	else if (new_state == NVKM_THERM_THRS_HIGHER &&
+		cur < thrs->temp - thrs->hysteresis)
+		new_state = NVKM_THERM_THRS_LOWER;
+	nvkm_therm_sensor_set_threshold_state(therm, thrs_name, new_state);
+
+	/* find the direction */
+	if (prev_state < new_state)
+		direction = NVKM_THERM_THRS_RISING;
+	else if (prev_state > new_state)
+		direction = NVKM_THERM_THRS_FALLING;
+	else
+		return;
+
+	/* advertise a change in direction */
+	nvkm_therm_sensor_event(therm, thrs_name, direction);
+}
+
+static void
+g84_therm_intr(struct nvkm_subdev *subdev)
+{
+	struct nvkm_therm *therm = nvkm_therm(subdev);
+	struct nvkm_therm_priv *priv = (void *)therm;
+	struct nvbios_therm_sensor *sensor = &priv->bios_sensor;
+	unsigned long flags;
+	uint32_t intr;
+
+	spin_lock_irqsave(&priv->sensor.alarm_program_lock, flags);
+
+	intr = nv_rd32(therm, 0x20100) & 0x3ff;
+
+	/* THRS_4: downclock */
+	if (intr & 0x002) {
+		g84_therm_threshold_hyst_emulation(therm, 0x20414, 24,
+						   &sensor->thrs_down_clock,
+						   NVKM_THERM_THRS_DOWNCLOCK);
+		intr &= ~0x002;
+	}
+
+	/* shutdown */
+	if (intr & 0x004) {
+		g84_therm_threshold_hyst_emulation(therm, 0x20480, 20,
+						   &sensor->thrs_shutdown,
+						   NVKM_THERM_THRS_SHUTDOWN);
+		intr &= ~0x004;
+	}
+
+	/* THRS_1 : fan boost */
+	if (intr & 0x008) {
+		g84_therm_threshold_hyst_emulation(therm, 0x204c4, 21,
+						   &sensor->thrs_fan_boost,
+						   NVKM_THERM_THRS_FANBOOST);
+		intr &= ~0x008;
+	}
+
+	/* THRS_2 : critical */
+	if (intr & 0x010) {
+		g84_therm_threshold_hyst_emulation(therm, 0x204c0, 22,
+						   &sensor->thrs_critical,
+						   NVKM_THERM_THRS_CRITICAL);
+		intr &= ~0x010;
+	}
+
+	if (intr)
+		nv_error(therm, "unhandled intr 0x%08x\n", intr);
+
+	/* ACK everything */
+	nv_wr32(therm, 0x20100, 0xffffffff);
+	nv_wr32(therm, 0x1100, 0x10000); /* PBUS */
+
+	spin_unlock_irqrestore(&priv->sensor.alarm_program_lock, flags);
+}
+
+static int
+g84_therm_init(struct nvkm_object *object)
+{
+	struct g84_therm_priv *priv = (void *)object;
+	int ret;
+
+	ret = nvkm_therm_init(&priv->base.base);
+	if (ret)
+		return ret;
+
+	g84_sensor_setup(&priv->base.base);
+	return 0;
+}
+
+static int
+g84_therm_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
+	       struct nvkm_oclass *oclass, void *data, u32 size,
+	       struct nvkm_object **pobject)
+{
+	struct g84_therm_priv *priv;
+	int ret;
+
+	ret = nvkm_therm_create(parent, engine, oclass, &priv);
+	*pobject = nv_object(priv);
+	if (ret)
+		return ret;
+
+	priv->base.base.pwm_ctrl = nv50_fan_pwm_ctrl;
+	priv->base.base.pwm_get = nv50_fan_pwm_get;
+	priv->base.base.pwm_set = nv50_fan_pwm_set;
+	priv->base.base.pwm_clock = nv50_fan_pwm_clock;
+	priv->base.base.temp_get = g84_temp_get;
+	priv->base.sensor.program_alarms = g84_therm_program_alarms;
+	nv_subdev(priv)->intr = g84_therm_intr;
+
+	/* init the thresholds */
+	nvkm_therm_sensor_set_threshold_state(&priv->base.base,
+					      NVKM_THERM_THRS_SHUTDOWN,
+					      NVKM_THERM_THRS_LOWER);
+	nvkm_therm_sensor_set_threshold_state(&priv->base.base,
+					      NVKM_THERM_THRS_FANBOOST,
+					      NVKM_THERM_THRS_LOWER);
+	nvkm_therm_sensor_set_threshold_state(&priv->base.base,
+					      NVKM_THERM_THRS_CRITICAL,
+					      NVKM_THERM_THRS_LOWER);
+	nvkm_therm_sensor_set_threshold_state(&priv->base.base,
+					      NVKM_THERM_THRS_DOWNCLOCK,
+					      NVKM_THERM_THRS_LOWER);
+
+	return nvkm_therm_preinit(&priv->base.base);
+}
+
+int
+g84_therm_fini(struct nvkm_object *object, bool suspend)
+{
+	/* Disable PTherm IRQs */
+	nv_wr32(object, 0x20000, 0x00000000);
+
+	/* ACK all PTherm IRQs */
+	nv_wr32(object, 0x20100, 0xffffffff);
+	nv_wr32(object, 0x1100, 0x10000); /* PBUS */
+
+	return _nvkm_therm_fini(object, suspend);
+}
+
+struct nvkm_oclass
+g84_therm_oclass = {
+	.handle = NV_SUBDEV(THERM, 0x84),
+	.ofuncs = &(struct nvkm_ofuncs) {
+		.ctor = g84_therm_ctor,
+		.dtor = _nvkm_therm_dtor,
+		.init = g84_therm_init,
+		.fini = g84_therm_fini,
+	},
+};