The dma_last_beats is used by the Avalon Memory Mapped interface
controller, to define the last burst length.
Its value get stable after the last valid data of the DMA interface, and staying
stable until the positive edge of the DMA's xfer_req.
No need to condition the transfer of this register to avalon clock
domain.
The XFER_END state defines the end of a transaction, when the entire
data set is written or read to/from the DDRx memory.
A transaction can contain multiple Avalon bursts. Make sure that the FSM
goes back into staging phase at the end of each burst; also define a
signals which indicate the end of each burst for control.
The period_count should be updated once per clock cycle. This is not
enforced with the current implementation, which probably leads to
period_count being decremented on both m_axis_aclk edges.
A problem observed due to this is that the m_axis_tlast output is not
asserted or is asserted for a too short time for the consumer to
detect it.
Fix by letting the decrement (and thus the m_axis_tlast toggling)
happen only on the rising edge of the m_axis_aclk clock.
Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
The commit 6900c have added an additional register stage into the fifo read
data path, but the control signals (ready/valid/underflow) were not realigned
to the data. This can cause data lose or duplicated samples in some case.
Realign the control signals to the data.
The util_adxcvr supports GTX2, GTH3 and GTH4. The transceiver is selected
using the XCVR_TYPE parameter.
The axi_adxcvr on the other hand only has a configuration parameter to
indicate whether a GTX or GTH transceiver is used (GTH_OR_GTX_N). Since
there are some minor differences between GTH3 and GTH4 that software needs
to know about rename the GTH_OR_GTX_N to XCVR_TYPE and match use the same
semantics as util_adxcvr.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The dac_xfer_req should indicate one single thing, that the FIFO is in
read phase. Should not be affected by any signals, which indicates data
validity on any interface. (e.g. dac_valid)
This signal is not used by the device core, its main purpose is to
indicate the state of the interface for a posible intermediat processing
module.
Fix the reset of the dma_mem_waddr (write address register of the CDC
FIFO on DMA's clock domain). This solves the occasional invalid read backs after
multiple re-initialization of the PL_DDR_FIFO.
+ Build both the read and write logic around an FSM
+ Consistent naming of registers and wires
+ Add support for burst lenghts higher than one, current burst lenght
is 64
+ Fix all the bugs, and make it work (first bring up with
adrv9371x/a10soc)
If the ADI_HDL_DIR or ADI_PHDL_DIR are set on Windows platforms, an
invalid TCL character (e.g. backslash) may be used as a file separator,
causing issues with the build / library scripts.
Normalize the paths before using them as global TCL variables.
The first attempt (f3daf0) faild miserably. When the data_req signal
from the device had more than 1 cycle of deassert state, because of the
added latency of the data stream, the device got 'zeros' too.
In this fix, the DMA will hold the valid data on the bus, between two
consecutive data request. The bus is reseted just after all the data
were sent out.
The grey coder/decoder function was limited to 10 bits, and this
resulted an unwanted limitation of the FIFO size. Using this
module, the coder/decoder data width can be adjusted to the current
address width.
Reset the fifo_rd_data if the DMA does not have an active transfer.
Becasue all the DAC device cores are transfering the data from the FIFO
interface to the data interface without any validation signal, DMA needs to put
the data bus into a known state, to prevent the device core to send the
last known data again and again.
Add missing timing exceptions on paths between the DMA and DDR clock
domains. All these paths are properly synchronized using CDC in the HDL,
but are missing timing exceptions in the XDC file. This can lead to timing
errors when building a design using the axi_adc_fifo.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Export the reset signal for the link clock domain. This can be used by
external logic that is in the link clock domain to reset itself.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Enabling the phase alignment mode of the FPLL seems to break manual
re-calibration, which is required when changing the lane rates. The
calibration seems to select the wrong VCO frequency band and the PLL no
longer locks.
Disable phase alignment mode for now, this has a negative effects on
deterministic latency, but it is better than not working at all.
Waiting for feedback from Altera/Intel on how to make manual re-calibration
work in phase alignment mode.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
To be able to check the FPLL re-configuration arbitration status from
software enable the avmm_busy flag in the register map.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The DEGLITCH state of the RX state machine is a workaround for misbehaving
PHYs. It is an internal state and an implementation detail and it does not
really make sense to report through the status interface.
Rework things so that DEGLITCH state is reported as part of the CGS state
on the external status interface.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
The current layout of the debug ID register assumes that the ID_WIDTH is 3.
Change things so that the padding 0 width depends on the ID_WIDTH
parameter so that we end up with the same register layout regardless of the
value of ID_WIDTH.
Also split things into two registers, this allows for an ID_WIDTH up to 8
(which should hopefully be enough for all practical applications).
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Redesign the axi_dacfifo, to increase the supported datarates.
Major modifications:
+ The FIFO consist of two module: WRITE and READ. The axi_dacfifo_dac
was deprecated.
+ Both the AXI write and AXI read transaction are controlled by two
FSM, to increase redability of the code.
+ Support all the possible burst lengths [0..225], handles the last
fractional burst on both sides correctly.
+ Common reset architecture throughout the design, all the internal
registers and memories are reset on the posedge of dma_xfer_req
+ Delete all Altera related sources, for Altera projects
avl_dacfifo should be used.
WIP: foobar
[WIP]axi_dacfifo: Update
axi_dacfifo: Few minor updates, almost working state
Add a wrapper module for Altera/Intel platforms that instantiates and
connects all the components required to for a JESD204 link.
The following components are created:
* Transceiver for each lane
* Transceiver lane PLL (TX only)
* Transceiver reset controller
* Link PLL
* JESD204 link layer processing
* JESD204 link layer processing control interface
* axi_adxcvr link management peripheral
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Istvan Csomortani
Luca Ceresoli
Adrian Costina
AndreiGrozav
Lars-Peter Clausen
Matt Fornero
Rejeesh Kutty