332 lines
8.8 KiB
C
332 lines
8.8 KiB
C
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/*
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* Copyright 2015 Martin Peres
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Martin Peres
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*/
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#include "priv.h"
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#include <subdev/bios.h>
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#include <subdev/bios/extdev.h>
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#include <subdev/bios/iccsense.h>
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#include <subdev/bios/power_budget.h>
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#include <subdev/i2c.h>
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static bool
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nvkm_iccsense_validate_device(struct i2c_adapter *i2c, u8 addr,
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enum nvbios_extdev_type type)
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{
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switch (type) {
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case NVBIOS_EXTDEV_INA209:
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case NVBIOS_EXTDEV_INA219:
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return nv_rd16i2cr(i2c, addr, 0x0) >= 0;
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case NVBIOS_EXTDEV_INA3221:
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return nv_rd16i2cr(i2c, addr, 0xff) == 0x3220 &&
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nv_rd16i2cr(i2c, addr, 0xfe) == 0x5449;
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default:
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return false;
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}
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}
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static int
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nvkm_iccsense_poll_lane(struct i2c_adapter *i2c, u8 addr, u8 shunt_reg,
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u8 shunt_shift, u8 bus_reg, u8 bus_shift, u8 shunt,
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u16 lsb)
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{
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int vshunt = nv_rd16i2cr(i2c, addr, shunt_reg);
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int vbus = nv_rd16i2cr(i2c, addr, bus_reg);
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if (vshunt < 0 || vbus < 0)
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return -EINVAL;
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vshunt >>= shunt_shift;
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vbus >>= bus_shift;
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return vbus * vshunt * lsb / shunt;
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}
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static int
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nvkm_iccsense_ina2x9_read(struct nvkm_iccsense *iccsense,
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struct nvkm_iccsense_rail *rail,
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u8 shunt_reg, u8 bus_reg)
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{
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return nvkm_iccsense_poll_lane(rail->sensor->i2c, rail->sensor->addr,
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shunt_reg, 0, bus_reg, 3, rail->mohm,
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10 * 4);
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}
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static int
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nvkm_iccsense_ina209_read(struct nvkm_iccsense *iccsense,
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struct nvkm_iccsense_rail *rail)
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{
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return nvkm_iccsense_ina2x9_read(iccsense, rail, 3, 4);
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}
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static int
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nvkm_iccsense_ina219_read(struct nvkm_iccsense *iccsense,
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struct nvkm_iccsense_rail *rail)
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{
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return nvkm_iccsense_ina2x9_read(iccsense, rail, 1, 2);
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}
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static int
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nvkm_iccsense_ina3221_read(struct nvkm_iccsense *iccsense,
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struct nvkm_iccsense_rail *rail)
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{
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return nvkm_iccsense_poll_lane(rail->sensor->i2c, rail->sensor->addr,
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1 + (rail->idx * 2), 3,
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2 + (rail->idx * 2), 3, rail->mohm,
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40 * 8);
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}
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static void
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nvkm_iccsense_sensor_config(struct nvkm_iccsense *iccsense,
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struct nvkm_iccsense_sensor *sensor)
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{
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struct nvkm_subdev *subdev = &iccsense->subdev;
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nvkm_trace(subdev, "write config of extdev %i: 0x%04x\n", sensor->id, sensor->config);
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nv_wr16i2cr(sensor->i2c, sensor->addr, 0x00, sensor->config);
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}
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int
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nvkm_iccsense_read_all(struct nvkm_iccsense *iccsense)
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{
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int result = 0;
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struct nvkm_iccsense_rail *rail;
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if (!iccsense)
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return -EINVAL;
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list_for_each_entry(rail, &iccsense->rails, head) {
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int res;
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if (!rail->read)
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return -ENODEV;
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res = rail->read(iccsense, rail);
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if (res < 0)
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return res;
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result += res;
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}
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return result;
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}
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static void *
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nvkm_iccsense_dtor(struct nvkm_subdev *subdev)
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{
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struct nvkm_iccsense *iccsense = nvkm_iccsense(subdev);
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struct nvkm_iccsense_sensor *sensor, *tmps;
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struct nvkm_iccsense_rail *rail, *tmpr;
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list_for_each_entry_safe(sensor, tmps, &iccsense->sensors, head) {
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list_del(&sensor->head);
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kfree(sensor);
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}
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list_for_each_entry_safe(rail, tmpr, &iccsense->rails, head) {
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list_del(&rail->head);
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kfree(rail);
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}
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return iccsense;
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}
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static struct nvkm_iccsense_sensor*
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nvkm_iccsense_create_sensor(struct nvkm_iccsense *iccsense, u8 id)
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{
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struct nvkm_subdev *subdev = &iccsense->subdev;
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struct nvkm_bios *bios = subdev->device->bios;
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struct nvkm_i2c *i2c = subdev->device->i2c;
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struct nvbios_extdev_func extdev;
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struct nvkm_i2c_bus *i2c_bus;
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struct nvkm_iccsense_sensor *sensor;
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u8 addr;
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if (!i2c || !bios || nvbios_extdev_parse(bios, id, &extdev))
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return NULL;
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if (extdev.type == 0xff)
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return NULL;
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if (extdev.type != NVBIOS_EXTDEV_INA209 &&
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extdev.type != NVBIOS_EXTDEV_INA219 &&
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extdev.type != NVBIOS_EXTDEV_INA3221) {
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iccsense->data_valid = false;
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nvkm_error(subdev, "Unknown sensor type %x, power reading "
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"disabled\n", extdev.type);
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return NULL;
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}
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if (extdev.bus)
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i2c_bus = nvkm_i2c_bus_find(i2c, NVKM_I2C_BUS_SEC);
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else
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i2c_bus = nvkm_i2c_bus_find(i2c, NVKM_I2C_BUS_PRI);
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if (!i2c_bus)
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return NULL;
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addr = extdev.addr >> 1;
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if (!nvkm_iccsense_validate_device(&i2c_bus->i2c, addr,
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extdev.type)) {
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iccsense->data_valid = false;
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nvkm_warn(subdev, "found invalid sensor id: %i, power reading"
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"might be invalid\n", id);
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return NULL;
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}
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sensor = kmalloc(sizeof(*sensor), GFP_KERNEL);
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if (!sensor)
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return NULL;
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list_add_tail(&sensor->head, &iccsense->sensors);
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sensor->id = id;
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sensor->type = extdev.type;
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sensor->i2c = &i2c_bus->i2c;
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sensor->addr = addr;
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sensor->config = 0x0;
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return sensor;
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}
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static struct nvkm_iccsense_sensor*
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nvkm_iccsense_get_sensor(struct nvkm_iccsense *iccsense, u8 id)
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{
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struct nvkm_iccsense_sensor *sensor;
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list_for_each_entry(sensor, &iccsense->sensors, head) {
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if (sensor->id == id)
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return sensor;
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}
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return nvkm_iccsense_create_sensor(iccsense, id);
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}
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static int
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nvkm_iccsense_oneinit(struct nvkm_subdev *subdev)
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{
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struct nvkm_iccsense *iccsense = nvkm_iccsense(subdev);
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struct nvkm_bios *bios = subdev->device->bios;
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struct nvbios_power_budget budget;
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struct nvbios_iccsense stbl;
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int i, ret;
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if (!bios)
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return 0;
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ret = nvbios_power_budget_header(bios, &budget);
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if (!ret && budget.cap_entry != 0xff) {
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struct nvbios_power_budget_entry entry;
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ret = nvbios_power_budget_entry(bios, &budget,
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budget.cap_entry, &entry);
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if (!ret) {
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iccsense->power_w_max = entry.avg_w;
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iccsense->power_w_crit = entry.max_w;
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}
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}
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if (nvbios_iccsense_parse(bios, &stbl) || !stbl.nr_entry)
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return 0;
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iccsense->data_valid = true;
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for (i = 0; i < stbl.nr_entry; ++i) {
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struct pwr_rail_t *pwr_rail = &stbl.rail[i];
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struct nvkm_iccsense_sensor *sensor;
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int r;
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if (pwr_rail->mode != 1 || !pwr_rail->resistor_count)
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continue;
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sensor = nvkm_iccsense_get_sensor(iccsense, pwr_rail->extdev_id);
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if (!sensor)
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continue;
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if (!sensor->config)
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sensor->config = pwr_rail->config;
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else if (sensor->config != pwr_rail->config)
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nvkm_error(subdev, "config mismatch found for extdev %i\n", pwr_rail->extdev_id);
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for (r = 0; r < pwr_rail->resistor_count; ++r) {
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struct nvkm_iccsense_rail *rail;
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struct pwr_rail_resistor_t *res = &pwr_rail->resistors[r];
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int (*read)(struct nvkm_iccsense *,
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struct nvkm_iccsense_rail *);
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if (!res->mohm || !res->enabled)
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continue;
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switch (sensor->type) {
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case NVBIOS_EXTDEV_INA209:
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read = nvkm_iccsense_ina209_read;
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break;
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case NVBIOS_EXTDEV_INA219:
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read = nvkm_iccsense_ina219_read;
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break;
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case NVBIOS_EXTDEV_INA3221:
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read = nvkm_iccsense_ina3221_read;
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break;
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default:
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continue;
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}
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rail = kmalloc(sizeof(*rail), GFP_KERNEL);
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if (!rail)
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return -ENOMEM;
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rail->read = read;
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rail->sensor = sensor;
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rail->idx = r;
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rail->mohm = res->mohm;
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nvkm_debug(subdev, "create rail for extdev %i: { idx: %i, mohm: %i }\n", pwr_rail->extdev_id, r, rail->mohm);
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list_add_tail(&rail->head, &iccsense->rails);
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}
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}
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return 0;
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}
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static int
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nvkm_iccsense_init(struct nvkm_subdev *subdev)
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{
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struct nvkm_iccsense *iccsense = nvkm_iccsense(subdev);
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struct nvkm_iccsense_sensor *sensor;
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list_for_each_entry(sensor, &iccsense->sensors, head)
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nvkm_iccsense_sensor_config(iccsense, sensor);
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return 0;
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}
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static const struct nvkm_subdev_func
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iccsense_func = {
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.oneinit = nvkm_iccsense_oneinit,
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.init = nvkm_iccsense_init,
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.dtor = nvkm_iccsense_dtor,
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};
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void
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nvkm_iccsense_ctor(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
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struct nvkm_iccsense *iccsense)
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{
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nvkm_subdev_ctor(&iccsense_func, device, type, inst, &iccsense->subdev);
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}
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int
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nvkm_iccsense_new_(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
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struct nvkm_iccsense **iccsense)
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{
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if (!(*iccsense = kzalloc(sizeof(**iccsense), GFP_KERNEL)))
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return -ENOMEM;
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INIT_LIST_HEAD(&(*iccsense)->sensors);
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INIT_LIST_HEAD(&(*iccsense)->rails);
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nvkm_iccsense_ctor(device, type, inst, *iccsense);
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return 0;
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}
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