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