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 } 356