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