/* * 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 #include #include #include static bool nvkm_iccsense_validate_device(struct i2c_adapter *i2c, u8 addr, enum nvbios_extdev_type type, u8 rail) { switch (type) { case NVBIOS_EXTDEV_INA209: case NVBIOS_EXTDEV_INA219: return rail == 0 && nv_rd16i2cr(i2c, addr, 0x0) >= 0; case NVBIOS_EXTDEV_INA3221: return rail <= 3 && 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->i2c, rail->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->i2c, rail->addr, 1 + (rail->rail * 2), 3, 2 + (rail->rail * 2), 3, rail->mohm, 40 * 8); } int nvkm_iccsense_read(struct nvkm_iccsense *iccsense, u8 idx) { struct nvkm_iccsense_rail *rail; if (!iccsense || idx >= iccsense->rail_count) return -EINVAL; rail = &iccsense->rails[idx]; if (!rail->read) return -ENODEV; return rail->read(iccsense, rail); } int nvkm_iccsense_read_all(struct nvkm_iccsense *iccsense) { int result = 0, i; for (i = 0; i < iccsense->rail_count; ++i) { int res = nvkm_iccsense_read(iccsense, i); if (res >= 0) result += res; else return res; } return result; } static void * nvkm_iccsense_dtor(struct nvkm_subdev *subdev) { struct nvkm_iccsense *iccsense = nvkm_iccsense(subdev); if (iccsense->rails) kfree(iccsense->rails); return iccsense; } static int nvkm_iccsense_oneinit(struct nvkm_subdev *subdev) { struct nvkm_iccsense *iccsense = nvkm_iccsense(subdev); struct nvkm_bios *bios = subdev->device->bios; struct nvkm_i2c *i2c = subdev->device->i2c; struct nvbios_iccsense stbl; int i; if (!i2c || !bios || nvbios_iccsense_parse(bios, &stbl) || !stbl.nr_entry) return 0; iccsense->rails = kmalloc(sizeof(*iccsense->rails) * stbl.nr_entry, GFP_KERNEL); if (!iccsense->rails) return -ENOMEM; iccsense->data_valid = true; for (i = 0; i < stbl.nr_entry; ++i) { struct pwr_rail_t *r = &stbl.rail[i]; struct nvbios_extdev_func extdev; struct nvkm_iccsense_rail *rail; struct nvkm_i2c_bus *i2c_bus; u8 addr; if (!r->mode || r->resistor_mohm == 0) continue; if (nvbios_extdev_parse(bios, r->extdev_id, &extdev)) continue; if (extdev.type == 0xff) continue; 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) continue; addr = extdev.addr >> 1; if (!nvkm_iccsense_validate_device(&i2c_bus->i2c, addr, extdev.type, r->rail)) { iccsense->data_valid = false; nvkm_warn(subdev, "found unknown or invalid rail entry" " type 0x%x rail %i, power reading might be" " invalid\n", extdev.type, r->rail); continue; } rail = &iccsense->rails[iccsense->rail_count]; switch (extdev.type) { case NVBIOS_EXTDEV_INA209: rail->read = nvkm_iccsense_ina209_read; break; case NVBIOS_EXTDEV_INA219: rail->read = nvkm_iccsense_ina219_read; break; case NVBIOS_EXTDEV_INA3221: rail->read = nvkm_iccsense_ina3221_read; break; } rail->addr = addr; rail->rail = r->rail; rail->mohm = r->resistor_mohm; rail->i2c = &i2c_bus->i2c; ++iccsense->rail_count; } return 0; } struct nvkm_subdev_func iccsense_func = { .oneinit = nvkm_iccsense_oneinit, .dtor = nvkm_iccsense_dtor, }; void nvkm_iccsense_ctor(struct nvkm_device *device, int index, struct nvkm_iccsense *iccsense) { nvkm_subdev_ctor(&iccsense_func, device, index, 0, &iccsense->subdev); } int nvkm_iccsense_new_(struct nvkm_device *device, int index, struct nvkm_iccsense **iccsense) { if (!(*iccsense = kzalloc(sizeof(**iccsense), GFP_KERNEL))) return -ENOMEM; nvkm_iccsense_ctor(device, index, *iccsense); return 0; }