xref: /openbmc/linux/drivers/gpu/drm/nouveau/nvkm/subdev/therm/ic.c (revision 4b4193256c8d3bc3a5397b5cd9494c2ad386317d)

/*
 * Copyright 2012 Nouveau community
 *
 * 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/extdev.h>
#include <subdev/i2c.h>

static bool
probe_monitoring_device(struct nvkm_i2c_bus *bus,
			struct i2c_board_info *info, void *data)
{
	struct nvkm_therm *therm = data;
	struct nvbios_therm_sensor *sensor = &therm->bios_sensor;
	struct i2c_client *client;

	request_module("%s%s", I2C_MODULE_PREFIX, info->type);

	client = i2c_new_client_device(&bus->i2c, info);
	if (IS_ERR(client))
		return false;

	if (!client->dev.driver ||
	    to_i2c_driver(client->dev.driver)->detect(client, info)) {
		i2c_unregister_device(client);
		return false;
	}

	nvkm_debug(&therm->subdev,
		   "Found an %s at address 0x%x (controlled by lm_sensors, "
		   "temp offset %+i C)\n",
		   info->type, info->addr, sensor->offset_constant);
	therm->ic = client;
	return true;
}

static struct nvkm_i2c_bus_probe
nv_board_infos[] = {
	{ { I2C_BOARD_INFO("w83l785ts", 0x2d) }, 0 },
	{ { I2C_BOARD_INFO("w83781d", 0x2d) }, 0  },
	{ { I2C_BOARD_INFO("adt7473", 0x2e) }, 40  },
	{ { I2C_BOARD_INFO("adt7473", 0x2d) }, 40  },
	{ { I2C_BOARD_INFO("adt7473", 0x2c) }, 40  },
	{ { I2C_BOARD_INFO("f75375", 0x2e) }, 0  },
	{ { I2C_BOARD_INFO("lm99", 0x4c) }, 0  },
	{ { I2C_BOARD_INFO("lm90", 0x4c) }, 0  },
	{ { I2C_BOARD_INFO("lm90", 0x4d) }, 0  },
	{ { I2C_BOARD_INFO("adm1021", 0x18) }, 0  },
	{ { I2C_BOARD_INFO("adm1021", 0x19) }, 0  },
	{ { I2C_BOARD_INFO("adm1021", 0x1a) }, 0  },
	{ { I2C_BOARD_INFO("adm1021", 0x29) }, 0  },
	{ { I2C_BOARD_INFO("adm1021", 0x2a) }, 0  },
	{ { I2C_BOARD_INFO("adm1021", 0x2b) }, 0  },
	{ { I2C_BOARD_INFO("adm1021", 0x4c) }, 0  },
	{ { I2C_BOARD_INFO("adm1021", 0x4d) }, 0  },
	{ { I2C_BOARD_INFO("adm1021", 0x4e) }, 0  },
	{ { I2C_BOARD_INFO("lm63", 0x18) }, 0  },
	{ { I2C_BOARD_INFO("lm63", 0x4e) }, 0  },
	{ }
};

void
nvkm_therm_ic_ctor(struct nvkm_therm *therm)
{
	struct nvkm_device *device = therm->subdev.device;
	struct nvkm_bios *bios = device->bios;
	struct nvkm_i2c *i2c = device->i2c;
	struct nvkm_i2c_bus *bus;
	struct nvbios_extdev_func extdev_entry;

	bus = nvkm_i2c_bus_find(i2c, NVKM_I2C_BUS_PRI);
	if (!bus)
		return;

	if (!nvbios_extdev_find(bios, NVBIOS_EXTDEV_LM89, &extdev_entry)) {
		struct nvkm_i2c_bus_probe board[] = {
		  { { I2C_BOARD_INFO("lm90", extdev_entry.addr >> 1) }, 0},
		  { }
		};

		nvkm_i2c_bus_probe(bus, "monitoring device", board,
				   probe_monitoring_device, therm);
		if (therm->ic)
			return;
	}

	if (!nvbios_extdev_find(bios, NVBIOS_EXTDEV_ADT7473, &extdev_entry)) {
		struct nvkm_i2c_bus_probe board[] = {
		  { { I2C_BOARD_INFO("adt7473", extdev_entry.addr >> 1) }, 20 },
		  { }
		};

		nvkm_i2c_bus_probe(bus, "monitoring device", board,
				   probe_monitoring_device, therm);
		if (therm->ic)
			return;
	}

	if (nvbios_extdev_skip_probe(bios))
		return;

	/* The vbios doesn't provide the address of an exisiting monitoring
	   device. Let's try our static list.
	 */
	nvkm_i2c_bus_probe(bus, "monitoring device", nv_board_infos,
			   probe_monitoring_device, therm);
}