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#
# Copyright 2017 Ettus Research (National Instruments)
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
"""
magnesium dboard implementation module
"""
import struct
import time
from six import iteritems
from . import lib # Pulls in everything from C++-land
from .base import DboardManagerBase
from .. import nijesdcore
from ..uio import UIO
from ..mpmlog import get_logger
from .lmk_mg import LMK04828Mg
def create_spidev_iface(dev_node):
"""
Create a regs iface from a spidev node
"""
SPI_SPEED_HZ = 1000000
SPI_ADDR_SHIFT = 8
SPI_DATA_SHIFT = 0
SPI_READ_FLAG = 1<<23
SPI_WRIT_FLAG = 0
return lib.spi.make_spidev_regs_iface(
dev_node,
SPI_SPEED_HZ,
SPI_ADDR_SHIFT,
SPI_DATA_SHIFT,
SPI_READ_FLAG,
SPI_WRIT_FLAG
)
class Magnesium(DboardManagerBase):
"""
Holds all dboard specific information and methods of the magnesium dboard
"""
#########################################################################
# Overridables
#
# See DboardManagerBase for documentation on these fields
#########################################################################
pids = [0x150]
# Maps the chipselects to the corresponding devices:
spi_chipselect = {"lmk": 0, "mykonos": 1}
def __init__(self, slot_idx, **kwargs):
super(Magnesium, self).__init__(*args, **kwargs)
self.log = get_logger("Magnesium")
spi_devices = kwargs['spi_nodes']
# eeprom_data is a tuple (head_dict, raw_data)
if len(spi_devices) != len(self.spi_chipselect):
self.log.error("Expected {0} spi devices, found {1} spi devices".format(
len(self.spi_chipselect), len(spi_devices),
))
raise RuntimeError("Not enough SPI devices found.")
self._spi_nodes = {}
for k, v in iteritems(self.spi_chipselect):
self._spi_nodes[k] = spi_devices[v]
self.log.debug("spidev device node map: {}".format(self._spi_nodes))
def init_device(self):
"""
Execute necessary init dance to bring up dboard
"""
self.clock_regs = create_spidev_iface(self._spi_nodes['lmk'])
self.log.debug("Loading C++ drivers...")
self._device = lib.dboards.magnesium_manager(
self._spi_nodes['mykonos'],
)
self.spi_lock = self._device.get_spi_lock()
self.mykonos = self._device.get_radio_ctrl()
self.log.debug("Loaded C++ drivers.")
self.lmk = LMK04828Mg(self.clock_regs, self.spi_lock)
self.log.debug("Getting Mg A uio...")
self.radio_regs = UIO(label="jesd204b-regs", read_only=False)
self.log.info("Radio-register UIO object successfully generated!")
self.init_jesd(self.radio_regs)
def init_jesd(self, uio):
"""
Bring up the JESD link between Mykonos and the N310
"""
self.log.trace("Creating jesdcore object")
self.jesdcore = nijesdcore.NIMgJESDCore(uio)
self.log.trace("Checking JESD core...")
self.jesdcore.check_core()
self.log.trace("Initializing LMK...")
self.lmk.init()
self.radio_regs.poke32(0x2078, 0xA000040)
self.log.trace("Verify LMK Chip ID...")
self.lmk.verify_chip_id()
self.jesdcore.unreset_mmcm()
self.jesdcore.init()
self.log.trace("Resetting Mykonos...")
self.jesdcore.reset_mykonos() #not sure who owns the reset
self.log.trace("Initializing Mykonos...")
self.mykonos.begin_initialization()
self.jesdcore.send_sysref_pulse()
self.jesdcore.send_sysref_pulse()
self.mykonos.finish_initialization()
self.log.trace("Starting Mykonos framer...")
self.mykonos.start_jesd_rx()
self.jesdcore.send_sysref_pulse()
self.log.trace("Resetting FPGA deframer...")
self.jesdcore.init_deframer()
self.log.trace("Resetting FPGA framer...")
self.jesdcore.init_framer()
self.log.trace("Starting Mykonos deframer...")
self.mykonos.start_jesd_tx()
self.log.trace("Enable LMFC and send")
self.jesdcore.enable_lmfc()
self.jesdcore.send_sysref_pulse()
time.sleep(0.2)
if not self.jesdcore.get_framer_status():
raise Exception('JESD Core Framer is not synced!')
if not self.jesdcore.get_deframer_status():
raise Exception('JESD Core Deframer is not synced!')
if (self.mykonos.get_framer_status() & 0xFF != 0x3E):
raise Exception('Mykonos Framer is not synced!')
if (self.mykonos.get_deframer_status() & 0x7F != 0x28):
raise Exception('Mykonos Deframer is not synced!')
self.log.trace("JESD fully synced and ready")
def dump_jesd_core(self):
for i in range(0x2000, 0x2110, 0x10):
print("0x%04X " % i),
for j in range(0, 0x10, 0x4):
print("%08X" % self.radio_regs.peek32(i + j)),
print("")
def read_eeprom_v1(self, data):
"""
read eeprom data version 1
"""
# magnesium eeprom contains
# nothing
return struct.unpack_from("x", data)
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