drivers/hwmon/pmbus/pmbus.h

   1 /*
   2  * pmbus.h - Common defines and structures for PMBus devices
   3  *
   4  * Copyright (c) 2010, 2011 Ericsson AB.
   5  * Copyright (c) 2012 Guenter Roeck
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #ifndef PMBUS_H
  23 #define PMBUS_H
  24
  25 #include <linux/bitops.h>
  26 #include <linux/regulator/driver.h>
  27
  28 /*
  29  * Registers
  30  */
  31 enum pmbus_regs {
  32         PMBUS_PAGE                      = 0x00,
  33         PMBUS_OPERATION                 = 0x01,
  34         PMBUS_ON_OFF_CONFIG             = 0x02,
  35         PMBUS_CLEAR_FAULTS              = 0x03,
  36         PMBUS_PHASE                     = 0x04,
  37
  38         PMBUS_CAPABILITY                = 0x19,
  39         PMBUS_QUERY                     = 0x1A,
  40
  41         PMBUS_VOUT_MODE                 = 0x20,
  42         PMBUS_VOUT_COMMAND              = 0x21,
  43         PMBUS_VOUT_TRIM                 = 0x22,
  44         PMBUS_VOUT_CAL_OFFSET           = 0x23,
  45         PMBUS_VOUT_MAX                  = 0x24,
  46         PMBUS_VOUT_MARGIN_HIGH          = 0x25,
  47         PMBUS_VOUT_MARGIN_LOW           = 0x26,
  48         PMBUS_VOUT_TRANSITION_RATE      = 0x27,
  49         PMBUS_VOUT_DROOP                = 0x28,
  50         PMBUS_VOUT_SCALE_LOOP           = 0x29,
  51         PMBUS_VOUT_SCALE_MONITOR        = 0x2A,
  52
  53         PMBUS_COEFFICIENTS              = 0x30,
  54         PMBUS_POUT_MAX                  = 0x31,
  55
  56         PMBUS_FAN_CONFIG_12             = 0x3A,
  57         PMBUS_FAN_COMMAND_1             = 0x3B,
  58         PMBUS_FAN_COMMAND_2             = 0x3C,
  59         PMBUS_FAN_CONFIG_34             = 0x3D,
  60         PMBUS_FAN_COMMAND_3             = 0x3E,
  61         PMBUS_FAN_COMMAND_4             = 0x3F,
  62
  63         PMBUS_VOUT_OV_FAULT_LIMIT       = 0x40,
  64         PMBUS_VOUT_OV_FAULT_RESPONSE    = 0x41,
  65         PMBUS_VOUT_OV_WARN_LIMIT        = 0x42,
  66         PMBUS_VOUT_UV_WARN_LIMIT        = 0x43,
  67         PMBUS_VOUT_UV_FAULT_LIMIT       = 0x44,
  68         PMBUS_VOUT_UV_FAULT_RESPONSE    = 0x45,
  69         PMBUS_IOUT_OC_FAULT_LIMIT       = 0x46,
  70         PMBUS_IOUT_OC_FAULT_RESPONSE    = 0x47,
  71         PMBUS_IOUT_OC_LV_FAULT_LIMIT    = 0x48,
  72         PMBUS_IOUT_OC_LV_FAULT_RESPONSE = 0x49,
  73         PMBUS_IOUT_OC_WARN_LIMIT        = 0x4A,
  74         PMBUS_IOUT_UC_FAULT_LIMIT       = 0x4B,
  75         PMBUS_IOUT_UC_FAULT_RESPONSE    = 0x4C,
  76
  77         PMBUS_OT_FAULT_LIMIT            = 0x4F,
  78         PMBUS_OT_FAULT_RESPONSE         = 0x50,
  79         PMBUS_OT_WARN_LIMIT             = 0x51,
  80         PMBUS_UT_WARN_LIMIT             = 0x52,
  81         PMBUS_UT_FAULT_LIMIT            = 0x53,
  82         PMBUS_UT_FAULT_RESPONSE         = 0x54,
  83         PMBUS_VIN_OV_FAULT_LIMIT        = 0x55,
  84         PMBUS_VIN_OV_FAULT_RESPONSE     = 0x56,
  85         PMBUS_VIN_OV_WARN_LIMIT         = 0x57,
  86         PMBUS_VIN_UV_WARN_LIMIT         = 0x58,
  87         PMBUS_VIN_UV_FAULT_LIMIT        = 0x59,
  88
  89         PMBUS_IIN_OC_FAULT_LIMIT        = 0x5B,
  90         PMBUS_IIN_OC_WARN_LIMIT         = 0x5D,
  91
  92         PMBUS_POUT_OP_FAULT_LIMIT       = 0x68,
  93         PMBUS_POUT_OP_WARN_LIMIT        = 0x6A,
  94         PMBUS_PIN_OP_WARN_LIMIT         = 0x6B,
  95
  96         PMBUS_STATUS_BYTE               = 0x78,
  97         PMBUS_STATUS_WORD               = 0x79,
  98         PMBUS_STATUS_VOUT               = 0x7A,
  99         PMBUS_STATUS_IOUT               = 0x7B,
 100         PMBUS_STATUS_INPUT              = 0x7C,
 101         PMBUS_STATUS_TEMPERATURE        = 0x7D,
 102         PMBUS_STATUS_CML                = 0x7E,
 103         PMBUS_STATUS_OTHER              = 0x7F,
 104         PMBUS_STATUS_MFR_SPECIFIC       = 0x80,
 105         PMBUS_STATUS_FAN_12             = 0x81,
 106         PMBUS_STATUS_FAN_34             = 0x82,
 107
 108         PMBUS_READ_VIN                  = 0x88,
 109         PMBUS_READ_IIN                  = 0x89,
 110         PMBUS_READ_VCAP                 = 0x8A,
 111         PMBUS_READ_VOUT                 = 0x8B,
 112         PMBUS_READ_IOUT                 = 0x8C,
 113         PMBUS_READ_TEMPERATURE_1        = 0x8D,
 114         PMBUS_READ_TEMPERATURE_2        = 0x8E,
 115         PMBUS_READ_TEMPERATURE_3        = 0x8F,
 116         PMBUS_READ_FAN_SPEED_1          = 0x90,
 117         PMBUS_READ_FAN_SPEED_2          = 0x91,
 118         PMBUS_READ_FAN_SPEED_3          = 0x92,
 119         PMBUS_READ_FAN_SPEED_4          = 0x93,
 120         PMBUS_READ_DUTY_CYCLE           = 0x94,
 121         PMBUS_READ_FREQUENCY            = 0x95,
 122         PMBUS_READ_POUT                 = 0x96,
 123         PMBUS_READ_PIN                  = 0x97,
 124
 125         PMBUS_REVISION                  = 0x98,
 126         PMBUS_MFR_ID                    = 0x99,
 127         PMBUS_MFR_MODEL                 = 0x9A,
 128         PMBUS_MFR_REVISION              = 0x9B,
 129         PMBUS_MFR_LOCATION              = 0x9C,
 130         PMBUS_MFR_DATE                  = 0x9D,
 131         PMBUS_MFR_SERIAL                = 0x9E,
 132
 133 /*
 134  * Virtual registers.
 135  * Useful to support attributes which are not supported by standard PMBus
 136  * registers but exist as manufacturer specific registers on individual chips.
 137  * Must be mapped to real registers in device specific code.
 138  *
 139  * Semantics:
 140  * Virtual registers are all word size.
 141  * READ registers are read-only; writes are either ignored or return an error.
 142  * RESET registers are read/write. Reading reset registers returns zero
 143  * (used for detection), writing any value causes the associated history to be
 144  * reset.
 145  * Virtual registers have to be handled in device specific driver code. Chip
 146  * driver code returns non-negative register values if a virtual register is
 147  * supported, or a negative error code if not. The chip driver may return
 148  * -ENODATA or any other error code in this case, though an error code other
 149  * than -ENODATA is handled more efficiently and thus preferred. Either case,
 150  * the calling PMBus core code will abort if the chip driver returns an error
 151  * code when reading or writing virtual registers.
 152  */
 153         PMBUS_VIRT_BASE                 = 0x100,
 154         PMBUS_VIRT_READ_TEMP_AVG,
 155         PMBUS_VIRT_READ_TEMP_MIN,
 156         PMBUS_VIRT_READ_TEMP_MAX,
 157         PMBUS_VIRT_RESET_TEMP_HISTORY,
 158         PMBUS_VIRT_READ_VIN_AVG,
 159         PMBUS_VIRT_READ_VIN_MIN,
 160         PMBUS_VIRT_READ_VIN_MAX,
 161         PMBUS_VIRT_RESET_VIN_HISTORY,
 162         PMBUS_VIRT_READ_IIN_AVG,
 163         PMBUS_VIRT_READ_IIN_MIN,
 164         PMBUS_VIRT_READ_IIN_MAX,
 165         PMBUS_VIRT_RESET_IIN_HISTORY,
 166         PMBUS_VIRT_READ_PIN_AVG,
 167         PMBUS_VIRT_READ_PIN_MIN,
 168         PMBUS_VIRT_READ_PIN_MAX,
 169         PMBUS_VIRT_RESET_PIN_HISTORY,
 170         PMBUS_VIRT_READ_POUT_AVG,
 171         PMBUS_VIRT_READ_POUT_MIN,
 172         PMBUS_VIRT_READ_POUT_MAX,
 173         PMBUS_VIRT_RESET_POUT_HISTORY,
 174         PMBUS_VIRT_READ_VOUT_AVG,
 175         PMBUS_VIRT_READ_VOUT_MIN,
 176         PMBUS_VIRT_READ_VOUT_MAX,
 177         PMBUS_VIRT_RESET_VOUT_HISTORY,
 178         PMBUS_VIRT_READ_IOUT_AVG,
 179         PMBUS_VIRT_READ_IOUT_MIN,
 180         PMBUS_VIRT_READ_IOUT_MAX,
 181         PMBUS_VIRT_RESET_IOUT_HISTORY,
 182         PMBUS_VIRT_READ_TEMP2_AVG,
 183         PMBUS_VIRT_READ_TEMP2_MIN,
 184         PMBUS_VIRT_READ_TEMP2_MAX,
 185         PMBUS_VIRT_RESET_TEMP2_HISTORY,
 186
 187         PMBUS_VIRT_READ_VMON,
 188         PMBUS_VIRT_VMON_UV_WARN_LIMIT,
 189         PMBUS_VIRT_VMON_OV_WARN_LIMIT,
 190         PMBUS_VIRT_VMON_UV_FAULT_LIMIT,
 191         PMBUS_VIRT_VMON_OV_FAULT_LIMIT,
 192         PMBUS_VIRT_STATUS_VMON,
 193 };
 194
 195 /*
 196  * OPERATION
 197  */
 198 #define PB_OPERATION_CONTROL_ON         BIT(7)
 199
 200 /*
 201  * CAPABILITY
 202  */
 203 #define PB_CAPABILITY_SMBALERT          BIT(4)
 204 #define PB_CAPABILITY_ERROR_CHECK       BIT(7)
 205
 206 /*
 207  * VOUT_MODE
 208  */
 209 #define PB_VOUT_MODE_MODE_MASK          0xe0
 210 #define PB_VOUT_MODE_PARAM_MASK         0x1f
 211
 212 #define PB_VOUT_MODE_LINEAR             0x00
 213 #define PB_VOUT_MODE_VID                0x20
 214 #define PB_VOUT_MODE_DIRECT             0x40
 215
 216 /*
 217  * Fan configuration
 218  */
 219 #define PB_FAN_2_PULSE_MASK             (BIT(0) | BIT(1))
 220 #define PB_FAN_2_RPM                    BIT(2)
 221 #define PB_FAN_2_INSTALLED              BIT(3)
 222 #define PB_FAN_1_PULSE_MASK             (BIT(4) | BIT(5))
 223 #define PB_FAN_1_RPM                    BIT(6)
 224 #define PB_FAN_1_INSTALLED              BIT(7)
 225
 226 /*
 227  * STATUS_BYTE, STATUS_WORD (lower)
 228  */
 229 #define PB_STATUS_NONE_ABOVE            BIT(0)
 230 #define PB_STATUS_CML                   BIT(1)
 231 #define PB_STATUS_TEMPERATURE           BIT(2)
 232 #define PB_STATUS_VIN_UV                BIT(3)
 233 #define PB_STATUS_IOUT_OC               BIT(4)
 234 #define PB_STATUS_VOUT_OV               BIT(5)
 235 #define PB_STATUS_OFF                   BIT(6)
 236 #define PB_STATUS_BUSY                  BIT(7)
 237
 238 /*
 239  * STATUS_WORD (upper)
 240  */
 241 #define PB_STATUS_UNKNOWN               BIT(8)
 242 #define PB_STATUS_OTHER                 BIT(9)
 243 #define PB_STATUS_FANS                  BIT(10)
 244 #define PB_STATUS_POWER_GOOD_N          BIT(11)
 245 #define PB_STATUS_WORD_MFR              BIT(12)
 246 #define PB_STATUS_INPUT                 BIT(13)
 247 #define PB_STATUS_IOUT_POUT             BIT(14)
 248 #define PB_STATUS_VOUT                  BIT(15)
 249
 250 /*
 251  * STATUS_IOUT
 252  */
 253 #define PB_POUT_OP_WARNING              BIT(0)
 254 #define PB_POUT_OP_FAULT                BIT(1)
 255 #define PB_POWER_LIMITING               BIT(2)
 256 #define PB_CURRENT_SHARE_FAULT          BIT(3)
 257 #define PB_IOUT_UC_FAULT                BIT(4)
 258 #define PB_IOUT_OC_WARNING              BIT(5)
 259 #define PB_IOUT_OC_LV_FAULT             BIT(6)
 260 #define PB_IOUT_OC_FAULT                BIT(7)
 261
 262 /*
 263  * STATUS_VOUT, STATUS_INPUT
 264  */
 265 #define PB_VOLTAGE_UV_FAULT             BIT(4)
 266 #define PB_VOLTAGE_UV_WARNING           BIT(5)
 267 #define PB_VOLTAGE_OV_WARNING           BIT(6)
 268 #define PB_VOLTAGE_OV_FAULT             BIT(7)
 269
 270 /*
 271  * STATUS_INPUT
 272  */
 273 #define PB_PIN_OP_WARNING               BIT(0)
 274 #define PB_IIN_OC_WARNING               BIT(1)
 275 #define PB_IIN_OC_FAULT                 BIT(2)
 276
 277 /*
 278  * STATUS_TEMPERATURE
 279  */
 280 #define PB_TEMP_UT_FAULT                BIT(4)
 281 #define PB_TEMP_UT_WARNING              BIT(5)
 282 #define PB_TEMP_OT_WARNING              BIT(6)
 283 #define PB_TEMP_OT_FAULT                BIT(7)
 284
 285 /*
 286  * STATUS_FAN
 287  */
 288 #define PB_FAN_AIRFLOW_WARNING          BIT(0)
 289 #define PB_FAN_AIRFLOW_FAULT            BIT(1)
 290 #define PB_FAN_FAN2_SPEED_OVERRIDE      BIT(2)
 291 #define PB_FAN_FAN1_SPEED_OVERRIDE      BIT(3)
 292 #define PB_FAN_FAN2_WARNING             BIT(4)
 293 #define PB_FAN_FAN1_WARNING             BIT(5)
 294 #define PB_FAN_FAN2_FAULT               BIT(6)
 295 #define PB_FAN_FAN1_FAULT               BIT(7)
 296
 297 /*
 298  * CML_FAULT_STATUS
 299  */
 300 #define PB_CML_FAULT_OTHER_MEM_LOGIC    BIT(0)
 301 #define PB_CML_FAULT_OTHER_COMM         BIT(1)
 302 #define PB_CML_FAULT_PROCESSOR          BIT(3)
 303 #define PB_CML_FAULT_MEMORY             BIT(4)
 304 #define PB_CML_FAULT_PACKET_ERROR       BIT(5)
 305 #define PB_CML_FAULT_INVALID_DATA       BIT(6)
 306 #define PB_CML_FAULT_INVALID_COMMAND    BIT(7)
 307
 308 enum pmbus_sensor_classes {
 309         PSC_VOLTAGE_IN = 0,
 310         PSC_VOLTAGE_OUT,
 311         PSC_CURRENT_IN,
 312         PSC_CURRENT_OUT,
 313         PSC_POWER,
 314         PSC_TEMPERATURE,
 315         PSC_FAN,
 316         PSC_NUM_CLASSES         /* Number of power sensor classes */
 317 };
 318
 319 #define PMBUS_PAGES     32      /* Per PMBus specification */
 320
 321 /* Functionality bit mask */
 322 #define PMBUS_HAVE_VIN          BIT(0)
 323 #define PMBUS_HAVE_VCAP         BIT(1)
 324 #define PMBUS_HAVE_VOUT         BIT(2)
 325 #define PMBUS_HAVE_IIN          BIT(3)
 326 #define PMBUS_HAVE_IOUT         BIT(4)
 327 #define PMBUS_HAVE_PIN          BIT(5)
 328 #define PMBUS_HAVE_POUT         BIT(6)
 329 #define PMBUS_HAVE_FAN12        BIT(7)
 330 #define PMBUS_HAVE_FAN34        BIT(8)
 331 #define PMBUS_HAVE_TEMP         BIT(9)
 332 #define PMBUS_HAVE_TEMP2        BIT(10)
 333 #define PMBUS_HAVE_TEMP3        BIT(11)
 334 #define PMBUS_HAVE_STATUS_VOUT  BIT(12)
 335 #define PMBUS_HAVE_STATUS_IOUT  BIT(13)
 336 #define PMBUS_HAVE_STATUS_INPUT BIT(14)
 337 #define PMBUS_HAVE_STATUS_TEMP  BIT(15)
 338 #define PMBUS_HAVE_STATUS_FAN12 BIT(16)
 339 #define PMBUS_HAVE_STATUS_FAN34 BIT(17)
 340 #define PMBUS_HAVE_VMON         BIT(18)
 341 #define PMBUS_HAVE_STATUS_VMON  BIT(19)
 342
 343 enum pmbus_data_format { linear = 0, direct, vid };
 344 enum vrm_version { vr11 = 0, vr12 };
 345
 346 struct pmbus_driver_info {
 347         int pages;              /* Total number of pages */
 348         enum pmbus_data_format format[PSC_NUM_CLASSES];
 349         enum vrm_version vrm_version;
 350         /*
 351          * Support one set of coefficients for each sensor type
 352          * Used for chips providing data in direct mode.
 353          */
 354         int m[PSC_NUM_CLASSES]; /* mantissa for direct data format */
 355         int b[PSC_NUM_CLASSES]; /* offset */
 356         int R[PSC_NUM_CLASSES]; /* exponent */
 357
 358         u32 func[PMBUS_PAGES];  /* Functionality, per page */
 359         /*
 360          * The following functions map manufacturing specific register values
 361          * to PMBus standard register values. Specify only if mapping is
 362          * necessary.
 363          * Functions return the register value (read) or zero (write) if
 364          * successful. A return value of -ENODATA indicates that there is no
 365          * manufacturer specific register, but that a standard PMBus register
 366          * may exist. Any other negative return value indicates that the
 367          * register does not exist, and that no attempt should be made to read
 368          * the standard register.
 369          */
 370         int (*read_byte_data)(struct i2c_client *client, int page, int reg);
 371         int (*read_word_data)(struct i2c_client *client, int page, int reg);
 372         int (*write_word_data)(struct i2c_client *client, int page, int reg,
 373                                u16 word);
 374         int (*write_byte)(struct i2c_client *client, int page, u8 value);
 375         /*
 376          * The identify function determines supported PMBus functionality.
 377          * This function is only necessary if a chip driver supports multiple
 378          * chips, and the chip functionality is not pre-determined.
 379          */
 380         int (*identify)(struct i2c_client *client,
 381                         struct pmbus_driver_info *info);
 382
 383         /* Regulator functionality, if supported by this chip driver. */
 384         int num_regulators;
 385         const struct regulator_desc *reg_desc;
 386 };
 387
 388 /* Regulator ops */
 389
 390 extern const struct regulator_ops pmbus_regulator_ops;
 391
 392 /* Macro for filling in array of struct regulator_desc */
 393 #define PMBUS_REGULATOR(_name, _id)                             \
 394         [_id] = {                                               \
 395                 .name = (_name # _id),                          \
 396                 .id = (_id),                                    \
 397                 .of_match = of_match_ptr(_name # _id),          \
 398                 .regulators_node = of_match_ptr("regulators"),  \
 399                 .ops = &pmbus_regulator_ops,                    \
 400                 .type = REGULATOR_VOLTAGE,                      \
 401                 .owner = THIS_MODULE,                           \
 402         }
 403
 404 /* Function declarations */
 405
 406 void pmbus_clear_cache(struct i2c_client *client);
 407 int pmbus_set_page(struct i2c_client *client, u8 page);
 408 int pmbus_read_word_data(struct i2c_client *client, u8 page, u8 reg);
 409 int pmbus_write_word_data(struct i2c_client *client, u8 page, u8 reg, u16 word);
 410 int pmbus_read_byte_data(struct i2c_client *client, int page, u8 reg);
 411 int pmbus_write_byte(struct i2c_client *client, int page, u8 value);
 412 int pmbus_write_byte_data(struct i2c_client *client, int page, u8 reg,
 413                           u8 value);
 414 int pmbus_update_byte_data(struct i2c_client *client, int page, u8 reg,
 415                            u8 mask, u8 value);
 416 void pmbus_clear_faults(struct i2c_client *client);
 417 bool pmbus_check_byte_register(struct i2c_client *client, int page, int reg);
 418 bool pmbus_check_word_register(struct i2c_client *client, int page, int reg);
 419 int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id,
 420                    struct pmbus_driver_info *info);
 421 int pmbus_do_remove(struct i2c_client *client);
 422 const struct pmbus_driver_info *pmbus_get_driver_info(struct i2c_client
 423                                                       *client);
 424
 425 #endif /* PMBUS_H */