1 /* $NetBSD: nouveau_nvkm_subdev_iccsense_base.c,v 1.2 2021/12/18 23:45:40 riastradh Exp $ */
2
3 /*
4 * Copyright 2015 Martin Peres
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Martin Peres
25 */
26 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_iccsense_base.c,v 1.2 2021/12/18 23:45:40 riastradh Exp $");
28
29 #include "priv.h"
30
31 #include <subdev/bios.h>
32 #include <subdev/bios/extdev.h>
33 #include <subdev/bios/iccsense.h>
34 #include <subdev/bios/power_budget.h>
35 #include <subdev/i2c.h>
36
37 static bool
nvkm_iccsense_validate_device(struct i2c_adapter * i2c,u8 addr,enum nvbios_extdev_type type)38 nvkm_iccsense_validate_device(struct i2c_adapter *i2c, u8 addr,
39 enum nvbios_extdev_type type)
40 {
41 switch (type) {
42 case NVBIOS_EXTDEV_INA209:
43 case NVBIOS_EXTDEV_INA219:
44 return nv_rd16i2cr(i2c, addr, 0x0) >= 0;
45 case NVBIOS_EXTDEV_INA3221:
46 return nv_rd16i2cr(i2c, addr, 0xff) == 0x3220 &&
47 nv_rd16i2cr(i2c, addr, 0xfe) == 0x5449;
48 default:
49 return false;
50 }
51 }
52
53 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)54 nvkm_iccsense_poll_lane(struct i2c_adapter *i2c, u8 addr, u8 shunt_reg,
55 u8 shunt_shift, u8 bus_reg, u8 bus_shift, u8 shunt,
56 u16 lsb)
57 {
58 int vshunt = nv_rd16i2cr(i2c, addr, shunt_reg);
59 int vbus = nv_rd16i2cr(i2c, addr, bus_reg);
60
61 if (vshunt < 0 || vbus < 0)
62 return -EINVAL;
63
64 vshunt >>= shunt_shift;
65 vbus >>= bus_shift;
66
67 return vbus * vshunt * lsb / shunt;
68 }
69
70 static int
nvkm_iccsense_ina2x9_read(struct nvkm_iccsense * iccsense,struct nvkm_iccsense_rail * rail,u8 shunt_reg,u8 bus_reg)71 nvkm_iccsense_ina2x9_read(struct nvkm_iccsense *iccsense,
72 struct nvkm_iccsense_rail *rail,
73 u8 shunt_reg, u8 bus_reg)
74 {
75 return nvkm_iccsense_poll_lane(rail->sensor->i2c, rail->sensor->addr,
76 shunt_reg, 0, bus_reg, 3, rail->mohm,
77 10 * 4);
78 }
79
80 static int
nvkm_iccsense_ina209_read(struct nvkm_iccsense * iccsense,struct nvkm_iccsense_rail * rail)81 nvkm_iccsense_ina209_read(struct nvkm_iccsense *iccsense,
82 struct nvkm_iccsense_rail *rail)
83 {
84 return nvkm_iccsense_ina2x9_read(iccsense, rail, 3, 4);
85 }
86
87 static int
nvkm_iccsense_ina219_read(struct nvkm_iccsense * iccsense,struct nvkm_iccsense_rail * rail)88 nvkm_iccsense_ina219_read(struct nvkm_iccsense *iccsense,
89 struct nvkm_iccsense_rail *rail)
90 {
91 return nvkm_iccsense_ina2x9_read(iccsense, rail, 1, 2);
92 }
93
94 static int
nvkm_iccsense_ina3221_read(struct nvkm_iccsense * iccsense,struct nvkm_iccsense_rail * rail)95 nvkm_iccsense_ina3221_read(struct nvkm_iccsense *iccsense,
96 struct nvkm_iccsense_rail *rail)
97 {
98 return nvkm_iccsense_poll_lane(rail->sensor->i2c, rail->sensor->addr,
99 1 + (rail->idx * 2), 3,
100 2 + (rail->idx * 2), 3, rail->mohm,
101 40 * 8);
102 }
103
104 static void
nvkm_iccsense_sensor_config(struct nvkm_iccsense * iccsense,struct nvkm_iccsense_sensor * sensor)105 nvkm_iccsense_sensor_config(struct nvkm_iccsense *iccsense,
106 struct nvkm_iccsense_sensor *sensor)
107 {
108 struct nvkm_subdev *subdev = &iccsense->subdev;
109 nvkm_trace(subdev, "write config of extdev %i: 0x%04x\n", sensor->id, sensor->config);
110 nv_wr16i2cr(sensor->i2c, sensor->addr, 0x00, sensor->config);
111 }
112
113 int
nvkm_iccsense_read_all(struct nvkm_iccsense * iccsense)114 nvkm_iccsense_read_all(struct nvkm_iccsense *iccsense)
115 {
116 int result = 0;
117 struct nvkm_iccsense_rail *rail;
118
119 if (!iccsense)
120 return -EINVAL;
121
122 list_for_each_entry(rail, &iccsense->rails, head) {
123 int res;
124 if (!rail->read)
125 return -ENODEV;
126
127 res = rail->read(iccsense, rail);
128 if (res < 0)
129 return res;
130 result += res;
131 }
132 return result;
133 }
134
135 static void *
nvkm_iccsense_dtor(struct nvkm_subdev * subdev)136 nvkm_iccsense_dtor(struct nvkm_subdev *subdev)
137 {
138 struct nvkm_iccsense *iccsense = nvkm_iccsense(subdev);
139 struct nvkm_iccsense_sensor *sensor, *tmps;
140 struct nvkm_iccsense_rail *rail, *tmpr;
141
142 list_for_each_entry_safe(sensor, tmps, &iccsense->sensors, head) {
143 list_del(&sensor->head);
144 kfree(sensor);
145 }
146 list_for_each_entry_safe(rail, tmpr, &iccsense->rails, head) {
147 list_del(&rail->head);
148 kfree(rail);
149 }
150
151 return iccsense;
152 }
153
154 static struct nvkm_iccsense_sensor*
nvkm_iccsense_create_sensor(struct nvkm_iccsense * iccsense,u8 id)155 nvkm_iccsense_create_sensor(struct nvkm_iccsense *iccsense, u8 id)
156 {
157 struct nvkm_subdev *subdev = &iccsense->subdev;
158 struct nvkm_bios *bios = subdev->device->bios;
159 struct nvkm_i2c *i2c = subdev->device->i2c;
160 struct nvbios_extdev_func extdev;
161 struct nvkm_i2c_bus *i2c_bus;
162 struct nvkm_iccsense_sensor *sensor;
163 u8 addr;
164
165 if (!i2c || !bios || nvbios_extdev_parse(bios, id, &extdev))
166 return NULL;
167
168 if (extdev.type == 0xff)
169 return NULL;
170
171 if (extdev.type != NVBIOS_EXTDEV_INA209 &&
172 extdev.type != NVBIOS_EXTDEV_INA219 &&
173 extdev.type != NVBIOS_EXTDEV_INA3221) {
174 iccsense->data_valid = false;
175 nvkm_error(subdev, "Unknown sensor type %x, power reading "
176 "disabled\n", extdev.type);
177 return NULL;
178 }
179
180 if (extdev.bus)
181 i2c_bus = nvkm_i2c_bus_find(i2c, NVKM_I2C_BUS_SEC);
182 else
183 i2c_bus = nvkm_i2c_bus_find(i2c, NVKM_I2C_BUS_PRI);
184 if (!i2c_bus)
185 return NULL;
186
187 addr = extdev.addr >> 1;
188 if (!nvkm_iccsense_validate_device(&i2c_bus->i2c, addr,
189 extdev.type)) {
190 iccsense->data_valid = false;
191 nvkm_warn(subdev, "found invalid sensor id: %i, power reading"
192 "might be invalid\n", id);
193 return NULL;
194 }
195
196 sensor = kmalloc(sizeof(*sensor), GFP_KERNEL);
197 if (!sensor)
198 return NULL;
199
200 list_add_tail(&sensor->head, &iccsense->sensors);
201 sensor->id = id;
202 sensor->type = extdev.type;
203 sensor->i2c = &i2c_bus->i2c;
204 sensor->addr = addr;
205 sensor->config = 0x0;
206 return sensor;
207 }
208
209 static struct nvkm_iccsense_sensor*
nvkm_iccsense_get_sensor(struct nvkm_iccsense * iccsense,u8 id)210 nvkm_iccsense_get_sensor(struct nvkm_iccsense *iccsense, u8 id)
211 {
212 struct nvkm_iccsense_sensor *sensor;
213 list_for_each_entry(sensor, &iccsense->sensors, head) {
214 if (sensor->id == id)
215 return sensor;
216 }
217 return nvkm_iccsense_create_sensor(iccsense, id);
218 }
219
220 static int
nvkm_iccsense_oneinit(struct nvkm_subdev * subdev)221 nvkm_iccsense_oneinit(struct nvkm_subdev *subdev)
222 {
223 struct nvkm_iccsense *iccsense = nvkm_iccsense(subdev);
224 struct nvkm_bios *bios = subdev->device->bios;
225 struct nvbios_power_budget budget;
226 struct nvbios_iccsense stbl;
227 int i, ret;
228
229 if (!bios)
230 return 0;
231
232 ret = nvbios_power_budget_header(bios, &budget);
233 if (!ret && budget.cap_entry != 0xff) {
234 struct nvbios_power_budget_entry entry;
235 ret = nvbios_power_budget_entry(bios, &budget,
236 budget.cap_entry, &entry);
237 if (!ret) {
238 iccsense->power_w_max = entry.avg_w;
239 iccsense->power_w_crit = entry.max_w;
240 }
241 }
242
243 if (nvbios_iccsense_parse(bios, &stbl) || !stbl.nr_entry)
244 return 0;
245
246 iccsense->data_valid = true;
247 for (i = 0; i < stbl.nr_entry; ++i) {
248 struct pwr_rail_t *pwr_rail = &stbl.rail[i];
249 struct nvkm_iccsense_sensor *sensor;
250 int r;
251
252 if (pwr_rail->mode != 1 || !pwr_rail->resistor_count)
253 continue;
254
255 sensor = nvkm_iccsense_get_sensor(iccsense, pwr_rail->extdev_id);
256 if (!sensor)
257 continue;
258
259 if (!sensor->config)
260 sensor->config = pwr_rail->config;
261 else if (sensor->config != pwr_rail->config)
262 nvkm_error(subdev, "config mismatch found for extdev %i\n", pwr_rail->extdev_id);
263
264 for (r = 0; r < pwr_rail->resistor_count; ++r) {
265 struct nvkm_iccsense_rail *rail;
266 struct pwr_rail_resistor_t *res = &pwr_rail->resistors[r];
267 int (*read)(struct nvkm_iccsense *,
268 struct nvkm_iccsense_rail *);
269
270 if (!res->mohm || !res->enabled)
271 continue;
272
273 switch (sensor->type) {
274 case NVBIOS_EXTDEV_INA209:
275 read = nvkm_iccsense_ina209_read;
276 break;
277 case NVBIOS_EXTDEV_INA219:
278 read = nvkm_iccsense_ina219_read;
279 break;
280 case NVBIOS_EXTDEV_INA3221:
281 read = nvkm_iccsense_ina3221_read;
282 break;
283 default:
284 continue;
285 }
286
287 rail = kmalloc(sizeof(*rail), GFP_KERNEL);
288 if (!rail)
289 return -ENOMEM;
290
291 rail->read = read;
292 rail->sensor = sensor;
293 rail->idx = r;
294 rail->mohm = res->mohm;
295 nvkm_debug(subdev, "create rail for extdev %i: { idx: %i, mohm: %i }\n", pwr_rail->extdev_id, r, rail->mohm);
296 list_add_tail(&rail->head, &iccsense->rails);
297 }
298 }
299 return 0;
300 }
301
302 static int
nvkm_iccsense_init(struct nvkm_subdev * subdev)303 nvkm_iccsense_init(struct nvkm_subdev *subdev)
304 {
305 struct nvkm_iccsense *iccsense = nvkm_iccsense(subdev);
306 struct nvkm_iccsense_sensor *sensor;
307 list_for_each_entry(sensor, &iccsense->sensors, head)
308 nvkm_iccsense_sensor_config(iccsense, sensor);
309 return 0;
310 }
311
312 static const struct nvkm_subdev_func
313 iccsense_func = {
314 .oneinit = nvkm_iccsense_oneinit,
315 .init = nvkm_iccsense_init,
316 .dtor = nvkm_iccsense_dtor,
317 };
318
319 void
nvkm_iccsense_ctor(struct nvkm_device * device,int index,struct nvkm_iccsense * iccsense)320 nvkm_iccsense_ctor(struct nvkm_device *device, int index,
321 struct nvkm_iccsense *iccsense)
322 {
323 nvkm_subdev_ctor(&iccsense_func, device, index, &iccsense->subdev);
324 }
325
326 int
nvkm_iccsense_new_(struct nvkm_device * device,int index,struct nvkm_iccsense ** iccsense)327 nvkm_iccsense_new_(struct nvkm_device *device, int index,
328 struct nvkm_iccsense **iccsense)
329 {
330 if (!(*iccsense = kzalloc(sizeof(**iccsense), GFP_KERNEL)))
331 return -ENOMEM;
332 INIT_LIST_HEAD(&(*iccsense)->sensors);
333 INIT_LIST_HEAD(&(*iccsense)->rails);
334 nvkm_iccsense_ctor(device, index, *iccsense);
335 return 0;
336 }
337