ce603b18f3
For PMBus chips, modifying one limit register may affect other limits. Since limits are all cached in the PMBus core driver, related changes are not reflected in reported limits. Introduce function to clear the attribute cache. After calling this function, the core pmbus driver re-reads all cached values. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
388 lines
13 KiB
C
388 lines
13 KiB
C
/*
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* pmbus.h - Common defines and structures for PMBus devices
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*
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* Copyright (c) 2010, 2011 Ericsson AB.
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* Copyright (c) 2012 Guenter Roeck
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef PMBUS_H
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#define PMBUS_H
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/*
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* Registers
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*/
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#define PMBUS_PAGE 0x00
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#define PMBUS_OPERATION 0x01
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#define PMBUS_ON_OFF_CONFIG 0x02
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#define PMBUS_CLEAR_FAULTS 0x03
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#define PMBUS_PHASE 0x04
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#define PMBUS_CAPABILITY 0x19
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#define PMBUS_QUERY 0x1A
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#define PMBUS_VOUT_MODE 0x20
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#define PMBUS_VOUT_COMMAND 0x21
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#define PMBUS_VOUT_TRIM 0x22
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#define PMBUS_VOUT_CAL_OFFSET 0x23
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#define PMBUS_VOUT_MAX 0x24
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#define PMBUS_VOUT_MARGIN_HIGH 0x25
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#define PMBUS_VOUT_MARGIN_LOW 0x26
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#define PMBUS_VOUT_TRANSITION_RATE 0x27
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#define PMBUS_VOUT_DROOP 0x28
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#define PMBUS_VOUT_SCALE_LOOP 0x29
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#define PMBUS_VOUT_SCALE_MONITOR 0x2A
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#define PMBUS_COEFFICIENTS 0x30
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#define PMBUS_POUT_MAX 0x31
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#define PMBUS_FAN_CONFIG_12 0x3A
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#define PMBUS_FAN_COMMAND_1 0x3B
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#define PMBUS_FAN_COMMAND_2 0x3C
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#define PMBUS_FAN_CONFIG_34 0x3D
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#define PMBUS_FAN_COMMAND_3 0x3E
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#define PMBUS_FAN_COMMAND_4 0x3F
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#define PMBUS_VOUT_OV_FAULT_LIMIT 0x40
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#define PMBUS_VOUT_OV_FAULT_RESPONSE 0x41
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#define PMBUS_VOUT_OV_WARN_LIMIT 0x42
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#define PMBUS_VOUT_UV_WARN_LIMIT 0x43
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#define PMBUS_VOUT_UV_FAULT_LIMIT 0x44
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#define PMBUS_VOUT_UV_FAULT_RESPONSE 0x45
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#define PMBUS_IOUT_OC_FAULT_LIMIT 0x46
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#define PMBUS_IOUT_OC_FAULT_RESPONSE 0x47
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#define PMBUS_IOUT_OC_LV_FAULT_LIMIT 0x48
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#define PMBUS_IOUT_OC_LV_FAULT_RESPONSE 0x49
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#define PMBUS_IOUT_OC_WARN_LIMIT 0x4A
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#define PMBUS_IOUT_UC_FAULT_LIMIT 0x4B
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#define PMBUS_IOUT_UC_FAULT_RESPONSE 0x4C
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#define PMBUS_OT_FAULT_LIMIT 0x4F
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#define PMBUS_OT_FAULT_RESPONSE 0x50
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#define PMBUS_OT_WARN_LIMIT 0x51
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#define PMBUS_UT_WARN_LIMIT 0x52
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#define PMBUS_UT_FAULT_LIMIT 0x53
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#define PMBUS_UT_FAULT_RESPONSE 0x54
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#define PMBUS_VIN_OV_FAULT_LIMIT 0x55
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#define PMBUS_VIN_OV_FAULT_RESPONSE 0x56
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#define PMBUS_VIN_OV_WARN_LIMIT 0x57
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#define PMBUS_VIN_UV_WARN_LIMIT 0x58
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#define PMBUS_VIN_UV_FAULT_LIMIT 0x59
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#define PMBUS_IIN_OC_FAULT_LIMIT 0x5B
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#define PMBUS_IIN_OC_WARN_LIMIT 0x5D
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#define PMBUS_POUT_OP_FAULT_LIMIT 0x68
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#define PMBUS_POUT_OP_WARN_LIMIT 0x6A
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#define PMBUS_PIN_OP_WARN_LIMIT 0x6B
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#define PMBUS_STATUS_BYTE 0x78
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#define PMBUS_STATUS_WORD 0x79
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#define PMBUS_STATUS_VOUT 0x7A
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#define PMBUS_STATUS_IOUT 0x7B
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#define PMBUS_STATUS_INPUT 0x7C
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#define PMBUS_STATUS_TEMPERATURE 0x7D
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#define PMBUS_STATUS_CML 0x7E
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#define PMBUS_STATUS_OTHER 0x7F
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#define PMBUS_STATUS_MFR_SPECIFIC 0x80
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#define PMBUS_STATUS_FAN_12 0x81
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#define PMBUS_STATUS_FAN_34 0x82
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#define PMBUS_READ_VIN 0x88
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#define PMBUS_READ_IIN 0x89
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#define PMBUS_READ_VCAP 0x8A
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#define PMBUS_READ_VOUT 0x8B
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#define PMBUS_READ_IOUT 0x8C
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#define PMBUS_READ_TEMPERATURE_1 0x8D
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#define PMBUS_READ_TEMPERATURE_2 0x8E
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#define PMBUS_READ_TEMPERATURE_3 0x8F
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#define PMBUS_READ_FAN_SPEED_1 0x90
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#define PMBUS_READ_FAN_SPEED_2 0x91
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#define PMBUS_READ_FAN_SPEED_3 0x92
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#define PMBUS_READ_FAN_SPEED_4 0x93
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#define PMBUS_READ_DUTY_CYCLE 0x94
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#define PMBUS_READ_FREQUENCY 0x95
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#define PMBUS_READ_POUT 0x96
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#define PMBUS_READ_PIN 0x97
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#define PMBUS_REVISION 0x98
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#define PMBUS_MFR_ID 0x99
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#define PMBUS_MFR_MODEL 0x9A
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#define PMBUS_MFR_REVISION 0x9B
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#define PMBUS_MFR_LOCATION 0x9C
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#define PMBUS_MFR_DATE 0x9D
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#define PMBUS_MFR_SERIAL 0x9E
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/*
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* Virtual registers.
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* Useful to support attributes which are not supported by standard PMBus
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* registers but exist as manufacturer specific registers on individual chips.
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* Must be mapped to real registers in device specific code.
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*
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* Semantics:
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* Virtual registers are all word size.
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* READ registers are read-only; writes are either ignored or return an error.
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* RESET registers are read/write. Reading reset registers returns zero
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* (used for detection), writing any value causes the associated history to be
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* reset.
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* Virtual registers have to be handled in device specific driver code. Chip
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* driver code returns non-negative register values if a virtual register is
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* supported, or a negative error code if not. The chip driver may return
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* -ENODATA or any other error code in this case, though an error code other
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* than -ENODATA is handled more efficiently and thus preferred. Either case,
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* the calling PMBus core code will abort if the chip driver returns an error
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* code when reading or writing virtual registers.
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*/
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#define PMBUS_VIRT_BASE 0x100
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#define PMBUS_VIRT_READ_TEMP_AVG (PMBUS_VIRT_BASE + 0)
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#define PMBUS_VIRT_READ_TEMP_MIN (PMBUS_VIRT_BASE + 1)
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#define PMBUS_VIRT_READ_TEMP_MAX (PMBUS_VIRT_BASE + 2)
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#define PMBUS_VIRT_RESET_TEMP_HISTORY (PMBUS_VIRT_BASE + 3)
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#define PMBUS_VIRT_READ_VIN_AVG (PMBUS_VIRT_BASE + 4)
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#define PMBUS_VIRT_READ_VIN_MIN (PMBUS_VIRT_BASE + 5)
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#define PMBUS_VIRT_READ_VIN_MAX (PMBUS_VIRT_BASE + 6)
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#define PMBUS_VIRT_RESET_VIN_HISTORY (PMBUS_VIRT_BASE + 7)
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#define PMBUS_VIRT_READ_IIN_AVG (PMBUS_VIRT_BASE + 8)
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#define PMBUS_VIRT_READ_IIN_MIN (PMBUS_VIRT_BASE + 9)
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#define PMBUS_VIRT_READ_IIN_MAX (PMBUS_VIRT_BASE + 10)
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#define PMBUS_VIRT_RESET_IIN_HISTORY (PMBUS_VIRT_BASE + 11)
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#define PMBUS_VIRT_READ_PIN_AVG (PMBUS_VIRT_BASE + 12)
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#define PMBUS_VIRT_READ_PIN_MAX (PMBUS_VIRT_BASE + 13)
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#define PMBUS_VIRT_RESET_PIN_HISTORY (PMBUS_VIRT_BASE + 14)
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#define PMBUS_VIRT_READ_POUT_AVG (PMBUS_VIRT_BASE + 15)
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#define PMBUS_VIRT_READ_POUT_MAX (PMBUS_VIRT_BASE + 16)
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#define PMBUS_VIRT_RESET_POUT_HISTORY (PMBUS_VIRT_BASE + 17)
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#define PMBUS_VIRT_READ_VOUT_AVG (PMBUS_VIRT_BASE + 18)
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#define PMBUS_VIRT_READ_VOUT_MIN (PMBUS_VIRT_BASE + 19)
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#define PMBUS_VIRT_READ_VOUT_MAX (PMBUS_VIRT_BASE + 20)
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#define PMBUS_VIRT_RESET_VOUT_HISTORY (PMBUS_VIRT_BASE + 21)
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#define PMBUS_VIRT_READ_IOUT_AVG (PMBUS_VIRT_BASE + 22)
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#define PMBUS_VIRT_READ_IOUT_MIN (PMBUS_VIRT_BASE + 23)
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#define PMBUS_VIRT_READ_IOUT_MAX (PMBUS_VIRT_BASE + 24)
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#define PMBUS_VIRT_RESET_IOUT_HISTORY (PMBUS_VIRT_BASE + 25)
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#define PMBUS_VIRT_READ_TEMP2_AVG (PMBUS_VIRT_BASE + 26)
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#define PMBUS_VIRT_READ_TEMP2_MIN (PMBUS_VIRT_BASE + 27)
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#define PMBUS_VIRT_READ_TEMP2_MAX (PMBUS_VIRT_BASE + 28)
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#define PMBUS_VIRT_RESET_TEMP2_HISTORY (PMBUS_VIRT_BASE + 29)
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#define PMBUS_VIRT_READ_VMON (PMBUS_VIRT_BASE + 30)
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#define PMBUS_VIRT_VMON_UV_WARN_LIMIT (PMBUS_VIRT_BASE + 31)
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#define PMBUS_VIRT_VMON_OV_WARN_LIMIT (PMBUS_VIRT_BASE + 32)
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#define PMBUS_VIRT_VMON_UV_FAULT_LIMIT (PMBUS_VIRT_BASE + 33)
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#define PMBUS_VIRT_VMON_OV_FAULT_LIMIT (PMBUS_VIRT_BASE + 34)
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#define PMBUS_VIRT_STATUS_VMON (PMBUS_VIRT_BASE + 35)
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/*
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* CAPABILITY
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*/
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#define PB_CAPABILITY_SMBALERT (1<<4)
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#define PB_CAPABILITY_ERROR_CHECK (1<<7)
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/*
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* VOUT_MODE
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*/
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#define PB_VOUT_MODE_MODE_MASK 0xe0
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#define PB_VOUT_MODE_PARAM_MASK 0x1f
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#define PB_VOUT_MODE_LINEAR 0x00
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#define PB_VOUT_MODE_VID 0x20
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#define PB_VOUT_MODE_DIRECT 0x40
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/*
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* Fan configuration
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*/
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#define PB_FAN_2_PULSE_MASK ((1 << 0) | (1 << 1))
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#define PB_FAN_2_RPM (1 << 2)
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#define PB_FAN_2_INSTALLED (1 << 3)
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#define PB_FAN_1_PULSE_MASK ((1 << 4) | (1 << 5))
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#define PB_FAN_1_RPM (1 << 6)
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#define PB_FAN_1_INSTALLED (1 << 7)
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/*
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* STATUS_BYTE, STATUS_WORD (lower)
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*/
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#define PB_STATUS_NONE_ABOVE (1<<0)
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#define PB_STATUS_CML (1<<1)
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#define PB_STATUS_TEMPERATURE (1<<2)
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#define PB_STATUS_VIN_UV (1<<3)
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#define PB_STATUS_IOUT_OC (1<<4)
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#define PB_STATUS_VOUT_OV (1<<5)
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#define PB_STATUS_OFF (1<<6)
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#define PB_STATUS_BUSY (1<<7)
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/*
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* STATUS_WORD (upper)
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*/
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#define PB_STATUS_UNKNOWN (1<<8)
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#define PB_STATUS_OTHER (1<<9)
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#define PB_STATUS_FANS (1<<10)
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#define PB_STATUS_POWER_GOOD_N (1<<11)
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#define PB_STATUS_WORD_MFR (1<<12)
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#define PB_STATUS_INPUT (1<<13)
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#define PB_STATUS_IOUT_POUT (1<<14)
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#define PB_STATUS_VOUT (1<<15)
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/*
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* STATUS_IOUT
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*/
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#define PB_POUT_OP_WARNING (1<<0)
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#define PB_POUT_OP_FAULT (1<<1)
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#define PB_POWER_LIMITING (1<<2)
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#define PB_CURRENT_SHARE_FAULT (1<<3)
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#define PB_IOUT_UC_FAULT (1<<4)
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#define PB_IOUT_OC_WARNING (1<<5)
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#define PB_IOUT_OC_LV_FAULT (1<<6)
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#define PB_IOUT_OC_FAULT (1<<7)
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/*
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* STATUS_VOUT, STATUS_INPUT
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*/
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#define PB_VOLTAGE_UV_FAULT (1<<4)
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#define PB_VOLTAGE_UV_WARNING (1<<5)
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#define PB_VOLTAGE_OV_WARNING (1<<6)
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#define PB_VOLTAGE_OV_FAULT (1<<7)
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/*
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* STATUS_INPUT
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*/
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#define PB_PIN_OP_WARNING (1<<0)
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#define PB_IIN_OC_WARNING (1<<1)
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#define PB_IIN_OC_FAULT (1<<2)
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/*
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* STATUS_TEMPERATURE
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*/
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#define PB_TEMP_UT_FAULT (1<<4)
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#define PB_TEMP_UT_WARNING (1<<5)
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#define PB_TEMP_OT_WARNING (1<<6)
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#define PB_TEMP_OT_FAULT (1<<7)
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/*
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* STATUS_FAN
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*/
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#define PB_FAN_AIRFLOW_WARNING (1<<0)
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#define PB_FAN_AIRFLOW_FAULT (1<<1)
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#define PB_FAN_FAN2_SPEED_OVERRIDE (1<<2)
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#define PB_FAN_FAN1_SPEED_OVERRIDE (1<<3)
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#define PB_FAN_FAN2_WARNING (1<<4)
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#define PB_FAN_FAN1_WARNING (1<<5)
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#define PB_FAN_FAN2_FAULT (1<<6)
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#define PB_FAN_FAN1_FAULT (1<<7)
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/*
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* CML_FAULT_STATUS
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*/
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#define PB_CML_FAULT_OTHER_MEM_LOGIC (1<<0)
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#define PB_CML_FAULT_OTHER_COMM (1<<1)
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#define PB_CML_FAULT_PROCESSOR (1<<3)
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#define PB_CML_FAULT_MEMORY (1<<4)
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#define PB_CML_FAULT_PACKET_ERROR (1<<5)
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#define PB_CML_FAULT_INVALID_DATA (1<<6)
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#define PB_CML_FAULT_INVALID_COMMAND (1<<7)
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enum pmbus_sensor_classes {
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PSC_VOLTAGE_IN = 0,
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PSC_VOLTAGE_OUT,
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PSC_CURRENT_IN,
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PSC_CURRENT_OUT,
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PSC_POWER,
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PSC_TEMPERATURE,
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PSC_FAN,
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PSC_NUM_CLASSES /* Number of power sensor classes */
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};
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#define PMBUS_PAGES 32 /* Per PMBus specification */
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/* Functionality bit mask */
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#define PMBUS_HAVE_VIN (1 << 0)
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#define PMBUS_HAVE_VCAP (1 << 1)
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#define PMBUS_HAVE_VOUT (1 << 2)
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#define PMBUS_HAVE_IIN (1 << 3)
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#define PMBUS_HAVE_IOUT (1 << 4)
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#define PMBUS_HAVE_PIN (1 << 5)
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#define PMBUS_HAVE_POUT (1 << 6)
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#define PMBUS_HAVE_FAN12 (1 << 7)
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#define PMBUS_HAVE_FAN34 (1 << 8)
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#define PMBUS_HAVE_TEMP (1 << 9)
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#define PMBUS_HAVE_TEMP2 (1 << 10)
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#define PMBUS_HAVE_TEMP3 (1 << 11)
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#define PMBUS_HAVE_STATUS_VOUT (1 << 12)
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#define PMBUS_HAVE_STATUS_IOUT (1 << 13)
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#define PMBUS_HAVE_STATUS_INPUT (1 << 14)
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#define PMBUS_HAVE_STATUS_TEMP (1 << 15)
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#define PMBUS_HAVE_STATUS_FAN12 (1 << 16)
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#define PMBUS_HAVE_STATUS_FAN34 (1 << 17)
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#define PMBUS_HAVE_VMON (1 << 18)
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#define PMBUS_HAVE_STATUS_VMON (1 << 19)
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enum pmbus_data_format { linear = 0, direct, vid };
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struct pmbus_driver_info {
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int pages; /* Total number of pages */
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enum pmbus_data_format format[PSC_NUM_CLASSES];
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/*
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* Support one set of coefficients for each sensor type
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* Used for chips providing data in direct mode.
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*/
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int m[PSC_NUM_CLASSES]; /* mantissa for direct data format */
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int b[PSC_NUM_CLASSES]; /* offset */
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int R[PSC_NUM_CLASSES]; /* exponent */
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u32 func[PMBUS_PAGES]; /* Functionality, per page */
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/*
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* The following functions map manufacturing specific register values
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* to PMBus standard register values. Specify only if mapping is
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* necessary.
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* Functions return the register value (read) or zero (write) if
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* successful. A return value of -ENODATA indicates that there is no
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* manufacturer specific register, but that a standard PMBus register
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* may exist. Any other negative return value indicates that the
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* register does not exist, and that no attempt should be made to read
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* the standard register.
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*/
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int (*read_byte_data)(struct i2c_client *client, int page, int reg);
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int (*read_word_data)(struct i2c_client *client, int page, int reg);
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int (*write_word_data)(struct i2c_client *client, int page, int reg,
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u16 word);
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int (*write_byte)(struct i2c_client *client, int page, u8 value);
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/*
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* The identify function determines supported PMBus functionality.
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* This function is only necessary if a chip driver supports multiple
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* chips, and the chip functionality is not pre-determined.
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*/
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int (*identify)(struct i2c_client *client,
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struct pmbus_driver_info *info);
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};
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/* Function declarations */
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void pmbus_clear_cache(struct i2c_client *client);
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int pmbus_set_page(struct i2c_client *client, u8 page);
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int pmbus_read_word_data(struct i2c_client *client, u8 page, u8 reg);
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int pmbus_write_word_data(struct i2c_client *client, u8 page, u8 reg, u16 word);
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int pmbus_read_byte_data(struct i2c_client *client, int page, u8 reg);
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int pmbus_write_byte(struct i2c_client *client, int page, u8 value);
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void pmbus_clear_faults(struct i2c_client *client);
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bool pmbus_check_byte_register(struct i2c_client *client, int page, int reg);
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bool pmbus_check_word_register(struct i2c_client *client, int page, int reg);
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int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id,
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struct pmbus_driver_info *info);
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int pmbus_do_remove(struct i2c_client *client);
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const struct pmbus_driver_info *pmbus_get_driver_info(struct i2c_client
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*client);
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#endif /* PMBUS_H */
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