2 * Copyright 2015 Martin Peres
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
22 * Authors: Martin Peres
26 #include <subdev/bios.h>
27 #include <subdev/bios/extdev.h>
28 #include <subdev/bios/iccsense.h>
29 #include <subdev/i2c.h>
32 nvkm_iccsense_validate_device(struct i2c_adapter *i2c, u8 addr,
33 enum nvbios_extdev_type type)
36 case NVBIOS_EXTDEV_INA209:
37 case NVBIOS_EXTDEV_INA219:
38 return nv_rd16i2cr(i2c, addr, 0x0) >= 0;
39 case NVBIOS_EXTDEV_INA3221:
40 return nv_rd16i2cr(i2c, addr, 0xff) == 0x3220 &&
41 nv_rd16i2cr(i2c, addr, 0xfe) == 0x5449;
48 nvkm_iccsense_poll_lane(struct i2c_adapter *i2c, u8 addr, u8 shunt_reg,
49 u8 shunt_shift, u8 bus_reg, u8 bus_shift, u8 shunt,
52 int vshunt = nv_rd16i2cr(i2c, addr, shunt_reg);
53 int vbus = nv_rd16i2cr(i2c, addr, bus_reg);
55 if (vshunt < 0 || vbus < 0)
58 vshunt >>= shunt_shift;
61 return vbus * vshunt * lsb / shunt;
65 nvkm_iccsense_ina2x9_read(struct nvkm_iccsense *iccsense,
66 struct nvkm_iccsense_rail *rail,
67 u8 shunt_reg, u8 bus_reg)
69 return nvkm_iccsense_poll_lane(rail->sensor->i2c, rail->sensor->addr,
70 shunt_reg, 0, bus_reg, 3, rail->mohm,
75 nvkm_iccsense_ina209_read(struct nvkm_iccsense *iccsense,
76 struct nvkm_iccsense_rail *rail)
78 return nvkm_iccsense_ina2x9_read(iccsense, rail, 3, 4);
82 nvkm_iccsense_ina219_read(struct nvkm_iccsense *iccsense,
83 struct nvkm_iccsense_rail *rail)
85 return nvkm_iccsense_ina2x9_read(iccsense, rail, 1, 2);
89 nvkm_iccsense_ina3221_read(struct nvkm_iccsense *iccsense,
90 struct nvkm_iccsense_rail *rail)
92 return nvkm_iccsense_poll_lane(rail->sensor->i2c, rail->sensor->addr,
93 1 + (rail->idx * 2), 3,
94 2 + (rail->idx * 2), 3, rail->mohm,
99 nvkm_iccsense_ina209_config(struct nvkm_iccsense *iccsense,
100 struct nvkm_iccsense_sensor *sensor)
102 struct nvkm_subdev *subdev = &iccsense->subdev;
104 * 0x0007: 0x0007 shunt and bus continous
105 * 0x0078: 0x0078 128 samples shunt
106 * 0x0780: 0x0780 128 samples bus
107 * 0x1800: 0x0000 +-40 mV shunt range
108 * 0x2000: 0x0000 16V FSR
111 nvkm_debug(subdev, "config for sensor id %i: 0x%x\n", sensor->id, value);
112 nv_wr16i2cr(sensor->i2c, sensor->addr, 0x00, value);
116 nvkm_iccsense_ina3221_config(struct nvkm_iccsense *iccsense,
117 struct nvkm_iccsense_sensor *sensor)
119 struct nvkm_subdev *subdev = &iccsense->subdev;
121 * 0x0007: 0x0007 shunt and bus continous
122 * 0x0031: 0x0000 140 us conversion time shunt
123 * 0x01c0: 0x0000 140 us conversion time bus
124 * 0x0f00: 0x0f00 1024 samples
125 * 0x7000: 0x?000 channels
128 if (sensor->rail_mask & 0x1)
130 if (sensor->rail_mask & 0x2)
132 if (sensor->rail_mask & 0x4)
134 nvkm_debug(subdev, "config for sensor id %i: 0x%x\n", sensor->id, value);
135 nv_wr16i2cr(sensor->i2c, sensor->addr, 0x00, value);
139 nvkm_iccsense_sensor_config(struct nvkm_iccsense *iccsense,
140 struct nvkm_iccsense_sensor *sensor)
142 switch (sensor->type) {
143 case NVBIOS_EXTDEV_INA209:
144 case NVBIOS_EXTDEV_INA219:
145 nvkm_iccsense_ina209_config(iccsense, sensor);
147 case NVBIOS_EXTDEV_INA3221:
148 nvkm_iccsense_ina3221_config(iccsense, sensor);
156 nvkm_iccsense_read_all(struct nvkm_iccsense *iccsense)
159 struct nvkm_iccsense_rail *rail;
164 list_for_each_entry(rail, &iccsense->rails, head) {
169 res = rail->read(iccsense, rail);
178 nvkm_iccsense_dtor(struct nvkm_subdev *subdev)
180 struct nvkm_iccsense *iccsense = nvkm_iccsense(subdev);
181 struct nvkm_iccsense_sensor *sensor, *tmps;
182 struct nvkm_iccsense_rail *rail, *tmpr;
184 list_for_each_entry_safe(sensor, tmps, &iccsense->sensors, head) {
185 list_del(&sensor->head);
188 list_for_each_entry_safe(rail, tmpr, &iccsense->rails, head) {
189 list_del(&rail->head);
196 static struct nvkm_iccsense_sensor*
197 nvkm_iccsense_create_sensor(struct nvkm_iccsense *iccsense, u8 id)
200 struct nvkm_subdev *subdev = &iccsense->subdev;
201 struct nvkm_bios *bios = subdev->device->bios;
202 struct nvkm_i2c *i2c = subdev->device->i2c;
203 struct nvbios_extdev_func extdev;
204 struct nvkm_i2c_bus *i2c_bus;
205 struct nvkm_iccsense_sensor *sensor;
208 if (!i2c || !bios || nvbios_extdev_parse(bios, id, &extdev))
211 if (extdev.type == 0xff)
214 if (extdev.type != NVBIOS_EXTDEV_INA209 &&
215 extdev.type != NVBIOS_EXTDEV_INA219 &&
216 extdev.type != NVBIOS_EXTDEV_INA3221) {
217 iccsense->data_valid = false;
218 nvkm_error(subdev, "Unknown sensor type %x, power reading "
219 "disabled\n", extdev.type);
224 i2c_bus = nvkm_i2c_bus_find(i2c, NVKM_I2C_BUS_SEC);
226 i2c_bus = nvkm_i2c_bus_find(i2c, NVKM_I2C_BUS_PRI);
230 addr = extdev.addr >> 1;
231 if (!nvkm_iccsense_validate_device(&i2c_bus->i2c, addr,
233 iccsense->data_valid = false;
234 nvkm_warn(subdev, "found invalid sensor id: %i, power reading"
235 "might be invalid\n", id);
239 sensor = kmalloc(sizeof(*sensor), GFP_KERNEL);
243 list_add_tail(&sensor->head, &iccsense->sensors);
245 sensor->type = extdev.type;
246 sensor->i2c = &i2c_bus->i2c;
248 sensor->rail_mask = 0x0;
252 static struct nvkm_iccsense_sensor*
253 nvkm_iccsense_get_sensor(struct nvkm_iccsense *iccsense, u8 id)
255 struct nvkm_iccsense_sensor *sensor;
256 list_for_each_entry(sensor, &iccsense->sensors, head) {
257 if (sensor->id == id)
260 return nvkm_iccsense_create_sensor(iccsense, id);
264 nvkm_iccsense_oneinit(struct nvkm_subdev *subdev)
266 struct nvkm_iccsense *iccsense = nvkm_iccsense(subdev);
267 struct nvkm_bios *bios = subdev->device->bios;
268 struct nvbios_iccsense stbl;
271 if (!bios || nvbios_iccsense_parse(bios, &stbl) || !stbl.nr_entry)
274 iccsense->data_valid = true;
275 for (i = 0; i < stbl.nr_entry; ++i) {
276 struct pwr_rail_t *r = &stbl.rail[i];
277 struct nvkm_iccsense_rail *rail;
278 struct nvkm_iccsense_sensor *sensor;
279 int (*read)(struct nvkm_iccsense *,
280 struct nvkm_iccsense_rail *);
282 if (!r->mode || r->resistor_mohm == 0)
285 sensor = nvkm_iccsense_get_sensor(iccsense, r->extdev_id);
289 switch (sensor->type) {
290 case NVBIOS_EXTDEV_INA209:
293 read = nvkm_iccsense_ina209_read;
295 case NVBIOS_EXTDEV_INA219:
298 read = nvkm_iccsense_ina219_read;
300 case NVBIOS_EXTDEV_INA3221:
303 read = nvkm_iccsense_ina3221_read;
309 rail = kmalloc(sizeof(*rail), GFP_KERNEL);
312 sensor->rail_mask |= 1 << r->rail;
314 rail->sensor = sensor;
316 rail->mohm = r->resistor_mohm;
317 list_add_tail(&rail->head, &iccsense->rails);
323 nvkm_iccsense_init(struct nvkm_subdev *subdev)
325 struct nvkm_iccsense *iccsense = nvkm_iccsense(subdev);
326 struct nvkm_iccsense_sensor *sensor;
327 list_for_each_entry(sensor, &iccsense->sensors, head)
328 nvkm_iccsense_sensor_config(iccsense, sensor);
332 struct nvkm_subdev_func iccsense_func = {
333 .oneinit = nvkm_iccsense_oneinit,
334 .init = nvkm_iccsense_init,
335 .dtor = nvkm_iccsense_dtor,
339 nvkm_iccsense_ctor(struct nvkm_device *device, int index,
340 struct nvkm_iccsense *iccsense)
342 nvkm_subdev_ctor(&iccsense_func, device, index, &iccsense->subdev);
346 nvkm_iccsense_new_(struct nvkm_device *device, int index,
347 struct nvkm_iccsense **iccsense)
349 if (!(*iccsense = kzalloc(sizeof(**iccsense), GFP_KERNEL)))
351 INIT_LIST_HEAD(&(*iccsense)->sensors);
352 INIT_LIST_HEAD(&(*iccsense)->rails);
353 nvkm_iccsense_ctor(device, index, *iccsense);