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@@ -23,7 +23,196 @@
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*/
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#include "priv.h"
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-struct nvkm_subdev_func iccsense_func = { 0 };
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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/i2c.h>
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+
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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, u8 rail)
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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 rail == 0 && nv_rd16i2cr(i2c, addr, 0x0) >= 0;
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+ case NVBIOS_EXTDEV_INA3221:
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+ return rail <= 3 &&
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+ 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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+
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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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+
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+ if (vshunt < 0 || vbus < 0)
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+ return -EINVAL;
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+
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+ vshunt >>= shunt_shift;
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+ vbus >>= bus_shift;
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+
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+ return vbus * vshunt * lsb / shunt;
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+}
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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->i2c, rail->addr, shunt_reg, 0,
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+ bus_reg, 3, rail->mohm, 10 * 4);
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+}
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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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+
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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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+
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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->i2c, rail->addr,
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+ 1 + (rail->rail * 2), 3,
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+ 2 + (rail->rail * 2), 3, rail->mohm,
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+ 40 * 8);
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+}
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+
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+int
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+nvkm_iccsense_read(struct nvkm_iccsense *iccsense, u8 idx)
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+{
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+ struct nvkm_iccsense_rail *rail;
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+
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+ if (!iccsense || idx >= iccsense->rail_count)
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+ return -EINVAL;
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+
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+ rail = &iccsense->rails[idx];
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+ if (!rail->read)
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+ return -ENODEV;
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+
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+ return rail->read(iccsense, rail);
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+}
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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, i;
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+ for (i = 0; i < iccsense->rail_count; ++i) {
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+ int res = nvkm_iccsense_read(iccsense, i);
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+ if (res >= 0)
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+ result += res;
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+ else
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+ return res;
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+ }
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+ return result;
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+}
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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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+
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+ if (iccsense->rails)
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+ kfree(iccsense->rails);
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+
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+ return iccsense;
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+}
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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 nvkm_i2c *i2c = subdev->device->i2c;
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+ struct nvbios_iccsense stbl;
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+ int i;
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+
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+ if (!i2c || !bios || nvbios_iccsense_parse(bios, &stbl)
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+ || !stbl.nr_entry)
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+ return 0;
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+
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+ iccsense->rails = kmalloc(sizeof(*iccsense->rails) * stbl.nr_entry,
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+ GFP_KERNEL);
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+ if (!iccsense->rails)
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+ return -ENOMEM;
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+
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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 *r = &stbl.rail[i];
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+ struct nvbios_extdev_func extdev;
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+ struct nvkm_iccsense_rail *rail;
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+ struct nvkm_i2c_bus *i2c_bus;
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+ u8 addr;
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+
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+ if (!r->mode || r->resistor_mohm == 0)
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+ continue;
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+
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+ if (nvbios_extdev_parse(bios, r->extdev_id, &extdev))
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+ continue;
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+
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+ if (extdev.type == 0xff)
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+ continue;
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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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+ continue;
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+
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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, r->rail)) {
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+ iccsense->data_valid = false;
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+ nvkm_warn(subdev, "found unknown or invalid rail entry"
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+ " type 0x%x rail %i, power reading might be"
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+ " invalid\n", extdev.type, r->rail);
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+ continue;
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+ }
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+
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+ rail = &iccsense->rails[iccsense->rail_count];
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+ switch (extdev.type) {
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+ case NVBIOS_EXTDEV_INA209:
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+ rail->read = nvkm_iccsense_ina209_read;
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+ break;
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+ case NVBIOS_EXTDEV_INA219:
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+ rail->read = nvkm_iccsense_ina219_read;
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+ break;
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+ case NVBIOS_EXTDEV_INA3221:
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+ rail->read = nvkm_iccsense_ina3221_read;
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+ break;
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+ }
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+
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+ rail->addr = addr;
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+ rail->rail = r->rail;
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+ rail->mohm = r->resistor_mohm;
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+ rail->i2c = &i2c_bus->i2c;
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+ ++iccsense->rail_count;
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+ }
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+ return 0;
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+}
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+
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+struct nvkm_subdev_func iccsense_func = {
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+ .oneinit = nvkm_iccsense_oneinit,
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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, int index,
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Karol Herbst