1 files changed, 331 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/iccsense/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/iccsense/base.c
new file mode 100644
index 000000000..8f0ccd366
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/iccsense/base.c
@@ -0,0 +1,331 @@
+/*
+ * Copyright 2015 Martin Peres
+ *
+ * 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: Martin Peres
+ */
+#include "priv.h"
+
+#include <subdev/bios.h>
+#include <subdev/bios/extdev.h>
+#include <subdev/bios/iccsense.h>
+#include <subdev/bios/power_budget.h>
+#include <subdev/i2c.h>
+
+static bool
+nvkm_iccsense_validate_device(struct i2c_adapter *i2c, u8 addr,
+			      enum nvbios_extdev_type type)
+{
+	switch (type) {
+	case NVBIOS_EXTDEV_INA209:
+	case NVBIOS_EXTDEV_INA219:
+		return nv_rd16i2cr(i2c, addr, 0x0) >= 0;
+	case NVBIOS_EXTDEV_INA3221:
+		return nv_rd16i2cr(i2c, addr, 0xff) == 0x3220 &&
+		       nv_rd16i2cr(i2c, addr, 0xfe) == 0x5449;
+	default:
+		return false;
+	}
+}
+
+static int
+nvkm_iccsense_poll_lane(struct i2c_adapter *i2c, u8 addr, u8 shunt_reg,
+			u8 shunt_shift, u8 bus_reg, u8 bus_shift, u8 shunt,
+			u16 lsb)
+{
+	int vshunt = nv_rd16i2cr(i2c, addr, shunt_reg);
+	int vbus = nv_rd16i2cr(i2c, addr, bus_reg);
+
+	if (vshunt < 0 || vbus < 0)
+		return -EINVAL;
+
+	vshunt >>= shunt_shift;
+	vbus >>= bus_shift;
+
+	return vbus * vshunt * lsb / shunt;
+}
+
+static int
+nvkm_iccsense_ina2x9_read(struct nvkm_iccsense *iccsense,
+                          struct nvkm_iccsense_rail *rail,
+			  u8 shunt_reg, u8 bus_reg)
+{
+	return nvkm_iccsense_poll_lane(rail->sensor->i2c, rail->sensor->addr,
+				       shunt_reg, 0, bus_reg, 3, rail->mohm,
+				       10 * 4);
+}
+
+static int
+nvkm_iccsense_ina209_read(struct nvkm_iccsense *iccsense,
+			  struct nvkm_iccsense_rail *rail)
+{
+	return nvkm_iccsense_ina2x9_read(iccsense, rail, 3, 4);
+}
+
+static int
+nvkm_iccsense_ina219_read(struct nvkm_iccsense *iccsense,
+			  struct nvkm_iccsense_rail *rail)
+{
+	return nvkm_iccsense_ina2x9_read(iccsense, rail, 1, 2);
+}
+
+static int
+nvkm_iccsense_ina3221_read(struct nvkm_iccsense *iccsense,
+			   struct nvkm_iccsense_rail *rail)
+{
+	return nvkm_iccsense_poll_lane(rail->sensor->i2c, rail->sensor->addr,
+				       1 + (rail->idx * 2), 3,
+				       2 + (rail->idx * 2), 3, rail->mohm,
+				       40 * 8);
+}
+
+static void
+nvkm_iccsense_sensor_config(struct nvkm_iccsense *iccsense,
+		            struct nvkm_iccsense_sensor *sensor)
+{
+	struct nvkm_subdev *subdev = &iccsense->subdev;
+	nvkm_trace(subdev, "write config of extdev %i: 0x%04x\n", sensor->id, sensor->config);
+	nv_wr16i2cr(sensor->i2c, sensor->addr, 0x00, sensor->config);
+}
+
+int
+nvkm_iccsense_read_all(struct nvkm_iccsense *iccsense)
+{
+	int result = 0;
+	struct nvkm_iccsense_rail *rail;
+
+	if (!iccsense)
+		return -EINVAL;
+
+	list_for_each_entry(rail, &iccsense->rails, head) {
+		int res;
+		if (!rail->read)
+			return -ENODEV;
+
+		res = rail->read(iccsense, rail);
+		if (res < 0)
+			return res;
+		result += res;
+	}
+	return result;
+}
+
+static void *
+nvkm_iccsense_dtor(struct nvkm_subdev *subdev)
+{
+	struct nvkm_iccsense *iccsense = nvkm_iccsense(subdev);
+	struct nvkm_iccsense_sensor *sensor, *tmps;
+	struct nvkm_iccsense_rail *rail, *tmpr;
+
+	list_for_each_entry_safe(sensor, tmps, &iccsense->sensors, head) {
+		list_del(&sensor->head);
+		kfree(sensor);
+	}
+	list_for_each_entry_safe(rail, tmpr, &iccsense->rails, head) {
+		list_del(&rail->head);
+		kfree(rail);
+	}
+
+	return iccsense;
+}
+
+static struct nvkm_iccsense_sensor*
+nvkm_iccsense_create_sensor(struct nvkm_iccsense *iccsense, u8 id)
+{
+	struct nvkm_subdev *subdev = &iccsense->subdev;
+	struct nvkm_bios *bios = subdev->device->bios;
+	struct nvkm_i2c *i2c = subdev->device->i2c;
+	struct nvbios_extdev_func extdev;
+	struct nvkm_i2c_bus *i2c_bus;
+	struct nvkm_iccsense_sensor *sensor;
+	u8 addr;
+
+	if (!i2c || !bios || nvbios_extdev_parse(bios, id, &extdev))
+		return NULL;
+
+	if (extdev.type == 0xff)
+		return NULL;
+
+	if (extdev.type != NVBIOS_EXTDEV_INA209 &&
+	    extdev.type != NVBIOS_EXTDEV_INA219 &&
+	    extdev.type != NVBIOS_EXTDEV_INA3221) {
+		iccsense->data_valid = false;
+		nvkm_error(subdev, "Unknown sensor type %x, power reading "
+			   "disabled\n", extdev.type);
+		return NULL;
+	}
+
+	if (extdev.bus)
+		i2c_bus = nvkm_i2c_bus_find(i2c, NVKM_I2C_BUS_SEC);
+	else
+		i2c_bus = nvkm_i2c_bus_find(i2c, NVKM_I2C_BUS_PRI);
+	if (!i2c_bus)
+		return NULL;
+
+	addr = extdev.addr >> 1;
+	if (!nvkm_iccsense_validate_device(&i2c_bus->i2c, addr,
+					   extdev.type)) {
+		iccsense->data_valid = false;
+		nvkm_warn(subdev, "found invalid sensor id: %i, power reading"
+			  "might be invalid\n", id);
+		return NULL;
+	}
+
+	sensor = kmalloc(sizeof(*sensor), GFP_KERNEL);
+	if (!sensor)
+		return NULL;
+
+	list_add_tail(&sensor->head, &iccsense->sensors);
+	sensor->id = id;
+	sensor->type = extdev.type;
+	sensor->i2c = &i2c_bus->i2c;
+	sensor->addr = addr;
+	sensor->config = 0x0;
+	return sensor;
+}
+
+static struct nvkm_iccsense_sensor*
+nvkm_iccsense_get_sensor(struct nvkm_iccsense *iccsense, u8 id)
+{
+	struct nvkm_iccsense_sensor *sensor;
+	list_for_each_entry(sensor, &iccsense->sensors, head) {
+		if (sensor->id == id)
+			return sensor;
+	}
+	return nvkm_iccsense_create_sensor(iccsense, id);
+}
+
+static int
+nvkm_iccsense_oneinit(struct nvkm_subdev *subdev)
+{
+	struct nvkm_iccsense *iccsense = nvkm_iccsense(subdev);
+	struct nvkm_bios *bios = subdev->device->bios;
+	struct nvbios_power_budget budget;
+	struct nvbios_iccsense stbl;
+	int i, ret;
+
+	if (!bios)
+		return 0;
+
+	ret = nvbios_power_budget_header(bios, &budget);
+	if (!ret && budget.cap_entry != 0xff) {
+		struct nvbios_power_budget_entry entry;
+		ret = nvbios_power_budget_entry(bios, &budget,
+		                                budget.cap_entry, &entry);
+		if (!ret) {
+			iccsense->power_w_max  = entry.avg_w;
+			iccsense->power_w_crit = entry.max_w;
+		}
+	}
+
+	if (nvbios_iccsense_parse(bios, &stbl) || !stbl.nr_entry)
+		return 0;
+
+	iccsense->data_valid = true;
+	for (i = 0; i < stbl.nr_entry; ++i) {
+		struct pwr_rail_t *pwr_rail = &stbl.rail[i];
+		struct nvkm_iccsense_sensor *sensor;
+		int r;
+
+		if (pwr_rail->mode != 1 || !pwr_rail->resistor_count)
+			continue;
+
+		sensor = nvkm_iccsense_get_sensor(iccsense, pwr_rail->extdev_id);
+		if (!sensor)
+			continue;
+
+		if (!sensor->config)
+			sensor->config = pwr_rail->config;
+		else if (sensor->config != pwr_rail->config)
+			nvkm_error(subdev, "config mismatch found for extdev %i\n", pwr_rail->extdev_id);
+
+		for (r = 0; r < pwr_rail->resistor_count; ++r) {
+			struct nvkm_iccsense_rail *rail;
+			struct pwr_rail_resistor_t *res = &pwr_rail->resistors[r];
+			int (*read)(struct nvkm_iccsense *,
+				    struct nvkm_iccsense_rail *);
+
+			if (!res->mohm || !res->enabled)
+				continue;
+
+			switch (sensor->type) {
+			case NVBIOS_EXTDEV_INA209:
+				read = nvkm_iccsense_ina209_read;
+				break;
+			case NVBIOS_EXTDEV_INA219:
+				read = nvkm_iccsense_ina219_read;
+				break;
+			case NVBIOS_EXTDEV_INA3221:
+				read = nvkm_iccsense_ina3221_read;
+				break;
+			default:
+				continue;
+			}
+
+			rail = kmalloc(sizeof(*rail), GFP_KERNEL);
+			if (!rail)
+				return -ENOMEM;
+
+			rail->read = read;
+			rail->sensor = sensor;
+			rail->idx = r;
+			rail->mohm = res->mohm;
+			nvkm_debug(subdev, "create rail for extdev %i: { idx: %i, mohm: %i }\n", pwr_rail->extdev_id, r, rail->mohm);
+			list_add_tail(&rail->head, &iccsense->rails);
+		}
+	}
+	return 0;
+}
+
+static int
+nvkm_iccsense_init(struct nvkm_subdev *subdev)
+{
+	struct nvkm_iccsense *iccsense = nvkm_iccsense(subdev);
+	struct nvkm_iccsense_sensor *sensor;
+	list_for_each_entry(sensor, &iccsense->sensors, head)
+		nvkm_iccsense_sensor_config(iccsense, sensor);
+	return 0;
+}
+
+static const struct nvkm_subdev_func
+iccsense_func = {
+	.oneinit = nvkm_iccsense_oneinit,
+	.init = nvkm_iccsense_init,
+	.dtor = nvkm_iccsense_dtor,
+};
+
+void
+nvkm_iccsense_ctor(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
+		   struct nvkm_iccsense *iccsense)
+{
+	nvkm_subdev_ctor(&iccsense_func, device, type, inst, &iccsense->subdev);
+}
+
+int
+nvkm_iccsense_new_(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
+		   struct nvkm_iccsense **iccsense)
+{
+	if (!(*iccsense = kzalloc(sizeof(**iccsense), GFP_KERNEL)))
+		return -ENOMEM;
+	INIT_LIST_HEAD(&(*iccsense)->sensors);
+	INIT_LIST_HEAD(&(*iccsense)->rails);
+	nvkm_iccsense_ctor(device, type, inst, *iccsense);
+	return 0;
+}