drivers/gpu/drm/nouveau/nvkm/subdev/iccsense/base.c

   1 /*
   2  * Copyright 2015 Martin Peres
   3  *
   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:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  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.
  21  *
  22  * Authors: Martin Peres
  23  */
  24 #include "priv.h"
  25
  26 #include <subdev/bios.h>
  27 #include <subdev/bios/extdev.h>
  28 #include <subdev/bios/iccsense.h>
  29 #include <subdev/i2c.h>
  30
  31 static bool
  32 nvkm_iccsense_validate_device(struct i2c_adapter *i2c, u8 addr,
  33                               enum nvbios_extdev_type type)
  34 {
  35         switch (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;
  42         default:
  43                 return false;
  44         }
  45 }
  46
  47 static int
  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,
  50                         u16 lsb)
  51 {
  52         int vshunt = nv_rd16i2cr(i2c, addr, shunt_reg);
  53         int vbus = nv_rd16i2cr(i2c, addr, bus_reg);
  54
  55         if (vshunt < 0 || vbus < 0)
  56                 return -EINVAL;
  57
  58         vshunt >>= shunt_shift;
  59         vbus >>= bus_shift;
  60
  61         return vbus * vshunt * lsb / shunt;
  62 }
  63
  64 static int
  65 nvkm_iccsense_ina2x9_read(struct nvkm_iccsense *iccsense,
  66                           struct nvkm_iccsense_rail *rail,
  67                           u8 shunt_reg, u8 bus_reg)
  68 {
  69         return nvkm_iccsense_poll_lane(rail->sensor->i2c, rail->sensor->addr,
  70                                        shunt_reg, 0, bus_reg, 3, rail->mohm,
  71                                        10 * 4);
  72 }
  73
  74 static int
  75 nvkm_iccsense_ina209_read(struct nvkm_iccsense *iccsense,
  76                           struct nvkm_iccsense_rail *rail)
  77 {
  78         return nvkm_iccsense_ina2x9_read(iccsense, rail, 3, 4);
  79 }
  80
  81 static int
  82 nvkm_iccsense_ina219_read(struct nvkm_iccsense *iccsense,
  83                           struct nvkm_iccsense_rail *rail)
  84 {
  85         return nvkm_iccsense_ina2x9_read(iccsense, rail, 1, 2);
  86 }
  87
  88 static int
  89 nvkm_iccsense_ina3221_read(struct nvkm_iccsense *iccsense,
  90                            struct nvkm_iccsense_rail *rail)
  91 {
  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,
  95                                        40 * 8);
  96 }
  97
  98 static void
  99 nvkm_iccsense_ina209_config(struct nvkm_iccsense *iccsense,
 100                             struct nvkm_iccsense_sensor *sensor)
 101 {
 102         struct nvkm_subdev *subdev = &iccsense->subdev;
 103         /* configuration:
 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
 109          */
 110         u16 value = 0x07ff;
 111         nvkm_debug(subdev, "config for sensor id %i: 0x%x\n", sensor->id, value);
 112         nv_wr16i2cr(sensor->i2c, sensor->addr, 0x00, value);
 113 }
 114
 115 static void
 116 nvkm_iccsense_ina3221_config(struct nvkm_iccsense *iccsense,
 117                              struct nvkm_iccsense_sensor *sensor)
 118 {
 119         struct nvkm_subdev *subdev = &iccsense->subdev;
 120         /* configuration:
 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
 126          */
 127         u16 value = 0x0e07;
 128         if (sensor->rail_mask & 0x1)
 129                 value |= 0x1 << 14;
 130         if (sensor->rail_mask & 0x2)
 131                 value |= 0x1 << 13;
 132         if (sensor->rail_mask & 0x4)
 133                 value |= 0x1 << 12;
 134         nvkm_debug(subdev, "config for sensor id %i: 0x%x\n", sensor->id, value);
 135         nv_wr16i2cr(sensor->i2c, sensor->addr, 0x00, value);
 136 }
 137
 138 static void
 139 nvkm_iccsense_sensor_config(struct nvkm_iccsense *iccsense,
 140                             struct nvkm_iccsense_sensor *sensor)
 141 {
 142         switch (sensor->type) {
 143         case NVBIOS_EXTDEV_INA209:
 144         case NVBIOS_EXTDEV_INA219:
 145                 nvkm_iccsense_ina209_config(iccsense, sensor);
 146                 break;
 147         case NVBIOS_EXTDEV_INA3221:
 148                 nvkm_iccsense_ina3221_config(iccsense, sensor);
 149                 break;
 150         default:
 151                 break;
 152         }
 153 }
 154
 155 int
 156 nvkm_iccsense_read_all(struct nvkm_iccsense *iccsense)
 157 {
 158         int result = 0;
 159         struct nvkm_iccsense_rail *rail;
 160
 161         if (!iccsense)
 162                 return -EINVAL;
 163
 164         list_for_each_entry(rail, &iccsense->rails, head) {
 165                 int res;
 166                 if (!rail->read)
 167                         return -ENODEV;
 168
 169                 res = rail->read(iccsense, rail);
 170                 if (res < 0)
 171                         return res;
 172                 result += res;
 173         }
 174         return result;
 175 }
 176
 177 static void *
 178 nvkm_iccsense_dtor(struct nvkm_subdev *subdev)
 179 {
 180         struct nvkm_iccsense *iccsense = nvkm_iccsense(subdev);
 181         struct nvkm_iccsense_sensor *sensor, *tmps;
 182         struct nvkm_iccsense_rail *rail, *tmpr;
 183
 184         list_for_each_entry_safe(sensor, tmps, &iccsense->sensors, head) {
 185                 list_del(&sensor->head);
 186                 kfree(sensor);
 187         }
 188         list_for_each_entry_safe(rail, tmpr, &iccsense->rails, head) {
 189                 list_del(&rail->head);
 190                 kfree(rail);
 191         }
 192
 193         return iccsense;
 194 }
 195
 196 static struct nvkm_iccsense_sensor*
 197 nvkm_iccsense_create_sensor(struct nvkm_iccsense *iccsense, u8 id)
 198 {
 199
 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;
 206         u8 addr;
 207
 208         if (!i2c || !bios || nvbios_extdev_parse(bios, id, &extdev))
 209                 return NULL;
 210
 211         if (extdev.type == 0xff)
 212                 return NULL;
 213
 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);
 220                 return NULL;
 221         }
 222
 223         if (extdev.bus)
 224                 i2c_bus = nvkm_i2c_bus_find(i2c, NVKM_I2C_BUS_SEC);
 225         else
 226                 i2c_bus = nvkm_i2c_bus_find(i2c, NVKM_I2C_BUS_PRI);
 227         if (!i2c_bus)
 228                 return NULL;
 229
 230         addr = extdev.addr >> 1;
 231         if (!nvkm_iccsense_validate_device(&i2c_bus->i2c, addr,
 232                                            extdev.type)) {
 233                 iccsense->data_valid = false;
 234                 nvkm_warn(subdev, "found invalid sensor id: %i, power reading"
 235                           "might be invalid\n", id);
 236                 return NULL;
 237         }
 238
 239         sensor = kmalloc(sizeof(*sensor), GFP_KERNEL);
 240         if (!sensor)
 241                 return NULL;
 242
 243         list_add_tail(&sensor->head, &iccsense->sensors);
 244         sensor->id = id;
 245         sensor->type = extdev.type;
 246         sensor->i2c = &i2c_bus->i2c;
 247         sensor->addr = addr;
 248         sensor->rail_mask = 0x0;
 249         return sensor;
 250 }
 251
 252 static struct nvkm_iccsense_sensor*
 253 nvkm_iccsense_get_sensor(struct nvkm_iccsense *iccsense, u8 id)
 254 {
 255         struct nvkm_iccsense_sensor *sensor;
 256         list_for_each_entry(sensor, &iccsense->sensors, head) {
 257                 if (sensor->id == id)
 258                         return sensor;
 259         }
 260         return nvkm_iccsense_create_sensor(iccsense, id);
 261 }
 262
 263 static int
 264 nvkm_iccsense_oneinit(struct nvkm_subdev *subdev)
 265 {
 266         struct nvkm_iccsense *iccsense = nvkm_iccsense(subdev);
 267         struct nvkm_bios *bios = subdev->device->bios;
 268         struct nvbios_iccsense stbl;
 269         int i;
 270
 271         if (!bios || nvbios_iccsense_parse(bios, &stbl) || !stbl.nr_entry)
 272                 return 0;
 273
 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 *);
 281
 282                 if (!r->mode || r->resistor_mohm == 0)
 283                         continue;
 284
 285                 sensor = nvkm_iccsense_get_sensor(iccsense, r->extdev_id);
 286                 if (!sensor)
 287                         continue;
 288
 289                 switch (sensor->type) {
 290                 case NVBIOS_EXTDEV_INA209:
 291                         if (r->rail != 0)
 292                                 continue;
 293                         read = nvkm_iccsense_ina209_read;
 294                         break;
 295                 case NVBIOS_EXTDEV_INA219:
 296                         if (r->rail != 0)
 297                                 continue;
 298                         read = nvkm_iccsense_ina219_read;
 299                         break;
 300                 case NVBIOS_EXTDEV_INA3221:
 301                         if (r->rail >= 3)
 302                                 continue;
 303                         read = nvkm_iccsense_ina3221_read;
 304                         break;
 305                 default:
 306                         continue;
 307                 }
 308
 309                 rail = kmalloc(sizeof(*rail), GFP_KERNEL);
 310                 if (!rail)
 311                         return -ENOMEM;
 312                 sensor->rail_mask |= 1 << r->rail;
 313                 rail->read = read;
 314                 rail->sensor = sensor;
 315                 rail->idx = r->rail;
 316                 rail->mohm = r->resistor_mohm;
 317                 list_add_tail(&rail->head, &iccsense->rails);
 318         }
 319         return 0;
 320 }
 321
 322 static int
 323 nvkm_iccsense_init(struct nvkm_subdev *subdev)
 324 {
 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);
 329         return 0;
 330 }
 331
 332 struct nvkm_subdev_func iccsense_func = {
 333         .oneinit = nvkm_iccsense_oneinit,
 334         .init = nvkm_iccsense_init,
 335         .dtor = nvkm_iccsense_dtor,
 336 };
 337
 338 void
 339 nvkm_iccsense_ctor(struct nvkm_device *device, int index,
 340                    struct nvkm_iccsense *iccsense)
 341 {
 342         nvkm_subdev_ctor(&iccsense_func, device, index, &iccsense->subdev);
 343 }
 344
 345 int
 346 nvkm_iccsense_new_(struct nvkm_device *device, int index,
 347                    struct nvkm_iccsense **iccsense)
 348 {
 349         if (!(*iccsense = kzalloc(sizeof(**iccsense), GFP_KERNEL)))
 350                 return -ENOMEM;
 351         INIT_LIST_HEAD(&(*iccsense)->sensors);
 352         INIT_LIST_HEAD(&(*iccsense)->rails);
 353         nvkm_iccsense_ctor(device, index, *iccsense);
 354         return 0;
 355 }