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uhd/mpm/python/usrp_mpm/periph_manager/e320_periphs.py
David Raeman f54baccc7b e320: Ensure consistent sequencing when powering on/off GPSDO 
When powering up the GPSDO, ensure the GPS_3V3 rail is up before taking
the GPSDO out of reset. When powering down the GPSDO, ensure I/O signals
are driven low to ensure GPSDO isn't backfed power via its I/O input pins.

Co-authored-by: Martin Braun <martin.braun@ettus.com>
2024-07-17 12:04:37 +02:00

395 lines
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#
# Copyright 2018 Ettus Research, a National Instruments Company
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
"""
E320 peripherals
"""
import math
import time
from usrp_mpm.sys_utils.sysfs_gpio import SysFSGPIO, GPIOBank
from usrp_mpm.periph_manager.common import MboardRegsCommon
# Map register values to SFP transport types
E320_SFP_TYPES = {
0: "", # Port not connected
1: "1G",
2: "10G",
3: "A", # Aurora
}
E320_FPGA_TYPES_BY_SFP = {
(""): "",
("1G"): "1G",
("10G"): "XG",
("A"): "AA",
}
class FrontpanelGPIO(GPIOBank):
"""
Abstraction layer for the front panel GPIO
"""
EMIO_BASE = 54
FP_GPIO_OFFSET = 32 # Bit offset within the ps_gpio_* pins
def __init__(self, ddr):
GPIOBank.__init__(
self,
{'label': 'zynq_gpio'},
self.FP_GPIO_OFFSET + self.EMIO_BASE,
0xFF, # use_mask
ddr
)
class MboardRegsControl(MboardRegsCommon):
"""
Control the FPGA Motherboard registers
"""
# pylint: disable=bad-whitespace
# Motherboard registers
MB_CLOCK_CTRL = 0x0018
MB_XADC_RB = 0x001C
MB_BUS_CLK_RATE = 0x0020
MB_BUS_COUNTER = 0x0024
MB_SFP_PORT_INFO = 0x0028
MB_GPIO_CTRL = 0x002C
MB_GPIO_MASTER = 0x0030
MB_GPIO_RADIO_SRC = 0x0034
MB_GPS_CTRL = 0x0038
MB_GPS_STATUS = 0x003C
MB_DBOARD_CTRL = 0x0040
MB_DBOARD_STATUS = 0x0044
# pylint: enable=bad-whitespace
# Bitfield locations for the MB_CLOCK_CTRL register.
MB_CLOCK_CTRL_PPS_SEL_INT = 0
MB_CLOCK_CTRL_PPS_SEL_EXT = 1
MB_CLOCK_CTRL_REF_SEL = 2
MB_CLOCK_CTRL_REF_CLK_LOCKED = 3
# Bitfield locations for the MB_GPIO_CTRL register.
MB_GPIO_CTRL_BUFFER_OE_N = 0
MB_GPIO_CTRL_EN_VAR_SUPPLY = 1
MB_GPIO_CTRL_EN_2V5 = 2
MB_GPIO_CTRL_EN_3V3 = 3
# Bitfield locations for the MB_GPS_CTRL register.
MB_GPS_CTRL_PWR_EN = 0
# This is connected to pin 23 (manual reset) of the GPS module.
# Section 2.3.9 (System Reset) of the data sheet says:
# This pin [...] can be connected to a reset switch. Initiating a system
# reset will cause the GPS receiver to not generate GPS fixes for up to 35
# seconds if power had been off for prolonged periods of time, and down to
# 3 seconds typically if the unit had been powered-on recently.
#
# Note that in this use case, we typically don't use the system reset during
# normal operations. Instead, we always fully power the GPS down when it's
# not needed. Standard operation is to power-up the GPS when the device boots
# and leave it running. GPS can also be powered-up or -down for the duration
# of a single UHD session, and the default state can be overriden in mpm.conf.
MB_GPS_CTRL_RST_N = 1
# This pin is for auto-survey mode, which we do not use. This pin is kept
# low at all times, as this mode is not intended for stationary use.
MB_GPS_CTRL_INITSURV_N = 2
# Bitfield locations for the MB_GPS_STATUS register.
MB_GPS_STATUS_LOCK = 0
MB_GPS_STATUS_ALARM = 1
MB_GPS_STATUS_PHASELOCK = 2
MB_GPS_STATUS_SURVEY = 3
MB_GPS_STATUS_WARMUP = 4
# Bitfield locations for the MB_DBOARD_CTRL register.
MB_DBOARD_CTRL_MIMO = 0
MB_DBOARD_CTRL_TX_CHAN_SEL = 1
# Bitfield locations for the MB_DBOARD_STATUS register.
MB_DBOARD_STATUS_RX_LOCK = 6
MB_DBOARD_STATUS_TX_LOCK = 7
def __init__(self, label, log):
MboardRegsCommon.__init__(self, label, log)
def enable_fp_gpio(self, enable):
""" Enable front panel GPIO buffers and power supply
and set voltage 3.3 V
"""
self.set_fp_gpio_voltage(3.3)
mask = 0xFFFFFFFF ^ ((0b1 << self.MB_GPIO_CTRL_BUFFER_OE_N) | \
(0b1 << self.MB_GPIO_CTRL_EN_VAR_SUPPLY))
with self.regs:
reg_val = self.peek32(self.MB_GPIO_CTRL) & mask
reg_val = reg_val | (not enable << self.MB_GPIO_CTRL_BUFFER_OE_N) | \
(enable << self.MB_GPIO_CTRL_EN_VAR_SUPPLY)
self.log.trace("Writing MB_GPIO_CTRL to 0x{:08X}".format(reg_val))
return self.poke32(self.MB_GPIO_CTRL, reg_val)
def set_fp_gpio_voltage(self, value):
""" Set Front Panel GPIO voltage (in volts)
3V3 2V5 | Voltage
-----------------
0 0 | 1.8 V
0 1 | 2.5 V
1 0 | 3.3 V
Arguments:
value : 3.3
"""
assert any([math.isclose(value, nn, abs_tol=0.1) for nn in (3.3,)]),\
"FP GPIO currently only supports 3.3V"
if math.isclose(value, 1.8, abs_tol=0.1):
voltage_reg = 0
elif math.isclose(value, 2.5, abs_tol=0.1):
voltage_reg = 1
elif math.isclose(value, 3.3, abs_tol=0.1):
voltage_reg = 2
mask = 0xFFFFFFFF ^ ((0b1 << self.MB_GPIO_CTRL_EN_3V3) | \
(0b1 << self.MB_GPIO_CTRL_EN_2V5))
with self.regs:
reg_val = self.peek32(self.MB_GPIO_CTRL) & mask
reg_val = reg_val | (voltage_reg << self.MB_GPIO_CTRL_EN_2V5)
self.log.trace("Writing MB_GPIO_CTRL to 0x{:08X}".format(reg_val))
return self.poke32(self.MB_GPIO_CTRL, reg_val)
def get_fp_gpio_voltage(self):
"""
Get Front Panel GPIO voltage (in volts)
"""
mask = 0x3 << self.MB_GPIO_CTRL_EN_2V5
voltage = [1.8, 2.5, 3.3]
with self.regs:
reg_val = (self.peek32(self.MB_GPIO_CTRL) & mask) >> self.MB_GPIO_CTRL_EN_2V5
return voltage[reg_val]
def set_fp_gpio_master(self, value):
"""set driver for front panel GPIO
Arguments:
value {unsigned} -- value is a single bit bit mask of 8 pins GPIO
"""
with self.regs:
self.poke32(self.MB_GPIO_MASTER, value)
def get_fp_gpio_master(self):
"""get "who" is driving front panel gpio
The return value is a bit mask of 8 pins GPIO.
0: means the pin is driven by PL
1: means the pin is driven by PS
"""
with self.regs:
return self.peek32(self.MB_GPIO_MASTER) & 0xff
def set_fp_gpio_radio_src(self, value):
"""set driver for front panel GPIO
Arguments:
value {unsigned} -- value is 2-bit bit mask of 8 pins GPIO
00: means the pin is driven by radio 0
01: means the pin is driven by radio 1
"""
with self.regs:
self.poke32(self.MB_GPIO_RADIO_SRC, value)
def get_fp_gpio_radio_src(self):
"""get which radio is driving front panel gpio
The return value is 2-bit bit mask of 8 pins GPIO.
00: means the pin is driven by radio 0
01: means the pin is driven by radio 1
"""
with self.regs:
return self.peek32(self.MB_GPIO_RADIO_SRC) & 0xffff
def set_time_source(self, time_source, ref_clk_freq):
"""
Set time source
"""
pps_sel_val = 0x0
if time_source == 'internal' or time_source == 'gpsdo':
self.log.trace("Setting time source to internal (GPSDO)"
"({:.1f} MHz reference)...".format(ref_clk_freq))
pps_sel_val = 0b1 << self.MB_CLOCK_CTRL_PPS_SEL_INT
elif time_source == 'external':
self.log.debug("Setting time source to external...")
pps_sel_val = 0b1 << self.MB_CLOCK_CTRL_PPS_SEL_EXT
else:
assert False, "Cannot set to invalid time source: {}".format(time_source)
pps_sel_mask = ((0b1 << self.MB_CLOCK_CTRL_PPS_SEL_INT) |
(0b1 << self.MB_CLOCK_CTRL_PPS_SEL_EXT))
with self.regs:
# prevent glitches by writing a cleared value first, then the final value.
reg_val = self.peek32(self.MB_CLOCK_CTRL) & ~pps_sel_mask
self.log.trace("Writing MB_CLOCK_CTRL to 0x{:08X}".format(reg_val))
self.poke32(self.MB_CLOCK_CTRL, reg_val)
reg_val = reg_val | pps_sel_val
self.log.trace("Writing MB_CLOCK_CTRL to 0x{:08X}".format(reg_val))
self.poke32(self.MB_CLOCK_CTRL, reg_val)
def set_clock_source(self, clock_source, ref_clk_freq):
"""
Set clock source
"""
if clock_source == 'internal' or clock_source == 'gpsdo':
self.log.trace("Setting clock source to internal (GPSDO)"
"({:.1f} MHz reference)...".format(ref_clk_freq))
ref_sel_val = 0b0
elif clock_source == 'external':
self.log.debug("Setting clock source to external..."
"({:.1f} MHz reference)...".format(ref_clk_freq))
ref_sel_val = 0b1
else:
assert False, "Cannot set to invalid clock source: {}".format(clock_source)
mask = 0xFFFFFFFF ^ (0b1 << self.MB_CLOCK_CTRL_REF_SEL)
with self.regs:
reg_val = self.peek32(self.MB_CLOCK_CTRL) & mask
reg_val = reg_val | (ref_sel_val << self.MB_CLOCK_CTRL_REF_SEL)
self.log.trace("Writing MB_CLOCK_CTRL to 0x{:08X}".format(reg_val))
self.poke32(self.MB_CLOCK_CTRL, reg_val)
def get_fpga_type(self):
"""
Reads the type of the FPGA image currently loaded
Returns a string with the type (ie 1G, XG, AU, etc.)
"""
with self.regs:
sfp_info_rb = self.peek32(self.MB_SFP_PORT_INFO)
# Print the registers values as 32-bit hex values
self.log.trace("SFP Info: 0x{0:0{1}X}".format(sfp_info_rb, 8))
sfp_type = E320_SFP_TYPES.get((sfp_info_rb & 0x0000FF00) >> 8, "")
self.log.trace("SFP type: {}".format(sfp_type))
try:
return E320_FPGA_TYPES_BY_SFP[(sfp_type)]
except KeyError:
self.log.warning("Unrecognized SFP type: {}"
.format(sfp_type))
return ""
def get_gps_locked_val(self):
"""
Get GPS LOCK status
"""
mask = 0b1 << self.MB_GPS_STATUS_LOCK
with self.regs:
reg_val = self.peek32(self.MB_GPS_STATUS) & mask
gps_locked = reg_val & 0x1 #FIXME
if gps_locked:
self.log.trace("GPS locked!")
# Can return this value because the gps_locked value is on the LSB
return gps_locked
def get_gps_status(self):
"""
Get GPS status
"""
mask = 0x1F
with self.regs:
gps_status = self.peek32(self.MB_GPS_STATUS) & mask
return gps_status
def enable_gps(self, enable):
"""Turn power to the GPS (CLK_GPS_PWR_EN) off or on.
When enabling the power, we sequence the power such that we first power
the chip, then bring it out of reset with a short delay.
When powering down the GPS, we make sure that all pins are low.
Power signal is GPS_3V3.
Note: This logic keeps MB_GPS_CTRL_INITSURV_N low at all times. Should
a different behaviour be desired, we need to change this to also
factor in the desired state of INITSURV_N. However, we are intentionally
keeping INITSURV mode off, as it's not intended for stationary use.
"""
self.log.trace("{} power to GPS".format(
"Enabling" if enable else "Disabling"
))
pwr_en_mask = (0b1 << self.MB_GPS_CTRL_PWR_EN)
rstn_mask = (0b1 << self.MB_GPS_CTRL_RST_N)
enabled_mask = pwr_en_mask | rstn_mask
with self.regs:
cur_reg_val = self.peek32(self.MB_GPS_CTRL)
if enable and (cur_reg_val & enabled_mask != enabled_mask):
# First bring up supply, then bring out of reset
self.log.trace(f"Setting MB_GPS_CTRL to 0x{pwr_en_mask:08X} (power enable)")
self.poke32(self.MB_GPS_CTRL, pwr_en_mask)
# Jackson Labs data sheet says: "Pull to ground for >50ms to
# initiate a system reset." Technically, we're powering the device
# on and pulling it out of reset, so the full reset time is not
# necessary, but we like sticking to values in data sheets and
# this is a safe number.
time.sleep(0.060)
self.log.trace(f"Setting MB_GPS_CTRL to 0x{enabled_mask:08X} (out of reset)")
return self.poke32(self.MB_GPS_CTRL, enabled_mask)
elif not enable:
# All controls pins low to avoid backfeeding I/O pins when unpowered
self.log.trace("Setting MB_GPS_CTRL to 0x00000000")
return self.poke32(self.MB_GPS_CTRL, 0)
def get_refclk_lock(self):
"""
Check the status of the reference clock (adf4002) in FPGA.
"""
mask = 0b1 << self.MB_CLOCK_CTRL_REF_CLK_LOCKED
with self.regs:
reg_val = self.peek32(self.MB_CLOCK_CTRL)
locked = (reg_val & mask) > 0
if not locked:
self.log.warning("Reference Clock reporting unlocked. "
"MB_CLOCK_CTRL reg: 0x{:08X}".format(reg_val))
else:
self.log.trace("Reference Clock locked!")
return locked
def set_channel_mode(self, channel_mode):
"""
Set channel mode in FPGA and select which tx channel to use
channel mode = "MIMO" for mimo
channel mode = "SISO_TX1", "SISO_TX0" for siso tx1, tx0 respectively.
"""
with self.regs:
reg_val = self.peek32(self.MB_DBOARD_CTRL)
if channel_mode == "MIMO":
reg_val = (0b1 << self.MB_DBOARD_CTRL_MIMO)
self.log.trace("Setting channel mode in AD9361 interface: %s",
"2R2T" if channel_mode == 2 else "1R1T")
else:
# Warn if user tries to set either tx0/tx1 in mimo mode
# as both will be set automatically
if channel_mode == "SISO_TX1":
# in SISO mode, Channel 1
reg_val = (0b1 << self.MB_DBOARD_CTRL_TX_CHAN_SEL) | (0b0 << self.MB_DBOARD_CTRL_MIMO)
self.log.trace("Setting TX channel in AD9361 interface to: TX1")
elif channel_mode == "SISO_TX0":
# in SISO mode, Channel 0
reg_val = (0b0 << self.MB_DBOARD_CTRL_TX_CHAN_SEL) | (0b0 << self.MB_DBOARD_CTRL_MIMO)
self.log.trace("Setting TX channel in AD9361 interface to: TX0")
self.log.trace("Writing MB_DBOARD_CTRL to 0x{:08X}".format(reg_val))
self.poke32(self.MB_DBOARD_CTRL, reg_val)
def get_ad9361_tx_lo_lock(self):
"""
Check the status of TX LO lock from CTRL_OUT pins from Catalina
"""
mask = 0b1 << self.MB_DBOARD_STATUS_TX_LOCK
with self.regs:
reg_val = self.peek32(self.MB_DBOARD_STATUS)
locked = (reg_val & mask) > 0
if not locked:
self.log.warning("TX RF PLL reporting unlocked. ")
else:
self.log.trace("TX RF PLL locked")
return locked
def get_ad9361_rx_lo_lock(self):
"""
Check the status of RX LO lock from CTRL_OUT pins from Catalina
"""
mask = 0b1 << self.MB_DBOARD_STATUS_RX_LOCK
with self.regs:
reg_val = self.peek32(self.MB_DBOARD_STATUS)
locked = (reg_val & mask) > 0
if not locked:
self.log.warning("RX RF PLL reporting unlocked. ")
else:
self.log.trace("RX RF PLL locked")
return locked
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