/*
* 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;
}
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