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Linux I2C Driver

November 6, 2016, 9:45 am
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ChangeLog
2016.3
NANone
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Linux GPIO Driver

November 7, 2016, 5:44 am
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Zynqmp DMA

November 7, 2016, 5:50 am
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ZYNQMP DMA Linux Driver for Zynq Ultrascale+ MPSoC
Introduction
This page gives
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Linux distribution and in open source linux as drivers/dma/xilinx/zynqmp_dma.c
About IP
Xilinx ZynqMP
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memory transfers.
ZynqMP
ZynqMP Ultrascale has
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DMA .
One One located in
Total 16 DMA channels (8 GDMA + 8 ADMA) are available.
Features:
Primay AXI bus widthFeatures supported
Memory to Memroy transfers are support of 128, 64
Optional Scatter/Gather
Scatter Gather (SG) DMA support. When Scatter/gather mode is not selected the IP operates in Simple DMA mode.
Optional overfetch support.transfer are support In Linked List Configuration
Optional descriptor's coherence.
AXI QOS bits and AXI cache bits can be configured optional for descriptors fetch and data read/write.
Optional AXI burst length is supported for both DST and SRC side. Supported values are only power of 2 i.e 1,2,4,8 and 16
KernelKnown Issues and Limitations
No support for flow control mode.
No support for linear and hybrid descriptor modes
No Support for Simple DMA mode
Work tobe done
Add support for Simple DMA mode
Add support for linear and hybrid descriptor modes
Kernel Configuration Options for Driver
The following config options should be enabled in order to build ZynqMP DMA driver:
config XILINX_ZYNQMP_DMA
...
help
Enable support for Xilinx ZynqMP DMA controller.
The following config options should be enabled inorder to build dmatest client
config DMATEST
tristate "DMA Test client"
help
Simple DMA test client. Say N unless you're debugging a
DMA Device driver.
For testing with multiple scatter gather sources following option should be enabled.
config DMA_ENGINE_RAID
Devicetree
In ZynqMP each channel is treated as independent device so for every channel there should be separate devicetree entry.
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power-domains = <&pd_adma>;
};
TestingTest Procedure
There is a generic dma test client driver availble here @ https://gitenterprise.xilinx.com/Linux/linux-xlnx/blob/master/drivers/dma/dmatest.c
For more details about how to use this test client find details here @ https://gitenterprise.xilinx.com/Linux/linux-xlnx/blob/master/Documentation/dmaengine/dmatest.txt
Features provided:
Scatter gather data transfer (Linked list) with option of desired number of scatter gather sources.
Slave scatter gather. (Need to be implemented)
Kernel Configuration Options for DMA Test clientMainline status
The following config options should be enabled inorder to build dmatest client
config DMATEST
tristate "DMA Test client"
help
Simple DMA test client. Say N unless you're debugging a
DMA Device driver.
For testingcurrent driver availble in the xilinx distribution is in sync with multiple scatter gather sources following option should be enabled.
config DMA_ENGINE_RAID
Known Issues and Limitations
No support for flow control mode.
No support for linear and hybrid descriptor modes
No Support for Simple DMA modethe open source driver
Change LOG
2016.3
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Linux AXI Ethernet driver

November 7, 2016, 5:51 am
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CONFIG_XILINX_PHY (For testing SGMII/1000Base-x Configuration with PCS/PMA Core)
{axi_ethmenuconfig.PNG}
Device tree node detailsDevicetree
For more details on phy bindings please refer "Documentation/devicetree/bindings/net/phy.txt"
axi_ethernet_eth_buf: ethernet@40c00000 {
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Cadence I2C Driver

November 7, 2016, 5:52 am
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Cadence I2C Linux driver for Zynq and Zynq Ultrascale+ MPSoC
Introduction
This page provides information about the Cadence I2C driver which can be found on Xilinx Git and mainline as i2c-cadence.c
Zynq has two I2C hard IP. I2C can be used as a master with this linux driver. I2C slave support is yet to be added in the driver.
There is support for repeated start with some limitations.
Mainline status
Cadence I2C driver is currentlyFeatures
Master mode
Support 16 bytes FIFO
Programmable normal and fast bus data rates
Interrupt support
Repeated start support using HOLD bit
FIFO control using HOLD bit
Slave monitoring support in sync with mainline withMaster mode.
Known issues and limitations
Repeated start after a read transfer is not supported by this controller; a warning is given when this condition is detected by the exception of slave monitoring support.
Any further changes will be upstreamed.driver.
The following are the controller errata:
Missing glitch filter ( http://www.xilinx.com/support/answers/61861.html )
I2C Master Generates Invalid Read Transactions ( http://www.xilinx.com/support/answers/61664.html )
Missing I2C Master Completion Interrupt ( http://www.xilinx.com/support/answers/61665.html )
Timing requirement violations
http://www.xilinx.com/support/answers/59366.html
http://www.xilinx.com/support/answers/60693.html
http://www.xilinx.com/support/answers/60694.html
I2C Missing Arbitration On Repeated Start ( http://www.xilinx.com/support/answers/60695.html )
Cadence I2C Driver Kernel Configuration
The following config options need to be enabled:
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};
};
Features
Master mode
Support 16 bytes FIFO
Programmable normal and fast bus data rates
Interrupt support
Repeated start support using HOLD bit
FIFO control using HOLD bit
Known issues and limitations
Repeated start after a read transfer is not supported by this controller; a warning is given when this condition is detected by the driver.
The following are the controller errata:
Missing glitch filter ( http://www.xilinx.com/support/answers/61861.html )
I2C Master Generates Invalid Read Transactions ( http://www.xilinx.com/support/answers/61664.html )
Missing I2C Master Completion Interrupt ( http://www.xilinx.com/support/answers/61665.html )
Timing requirement violations
http://www.xilinx.com/support/answers/59366.html
http://www.xilinx.com/support/answers/60693.html
http://www.xilinx.com/support/answers/60694.html
I2C Missing Arbitration On Repeated Start ( http://www.xilinx.com/support/answers/60695.html )
Testing
This section details i2c tests with various interfaces:
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2016.3
None
Mainline status
Cadence I2C driver is currently in sync with mainline with the exception of slave monitoring support.
Any further changes will be upstreamed.
Related Links
Linux Drivers
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Linux AXI Ethernet driver

November 7, 2016, 5:54 am
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Linux driver for Driver for Zynq
Introduction
This page gives an overview of Axi Ethernet Linux driver which is available as part of the Linux distribution. Paths, files, links and documentation on this page are given relative to the Linux kernel source tree.
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Linux AXI Ethernet driver

November 7, 2016, 5:55 am
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driver for Microblaze and Zynq and
Introduction
This page gives an overview of Axi Ethernet Linux driver which is available as part of the Linux distribution. Paths, files, links and documentation on this page are given relative to the Linux kernel source tree.
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PS UART

November 7, 2016, 6:31 am
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UART PS in Linux
Linux DevicetreeFeatures supported
Programmable baud rate generator
64-byte receive and transmit FIFOs
Programmable protocol:° 6, 7, or 8 data bits 1, 1.5, or 2 stop bits
Odd, even, space, mark, or no parity
Parity, framing and overrun error detection
Line-break generation and detection
Interrupts generation
Known Issues and Limitations
None
Work to be done
None
Kernel Configuration OptionsKernel Configuration Options
To enable the uart driver in the linux kernel you either have to integrate it or build it as kernel module (.ko). you can enable it with:
CONFIG_SERIAL_XILINX_PS_UART=y
CONFIG_SERIAL_XILINX_PS_UART_CONSOLE=y
Devicetree
Here's how the devicetree entry could look like.
uart0: serial@e0000000 {
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interrupts = <0 27 4>;
};
Enable the kernel driver
To enable the uartlite driver in the linux kernel you either have to integrate it or build it as kernel module (.ko). You can enable it with:
CONFIG_SERIAL_XILINX_PS_UART=y
CONFIG_SERIAL_XILINX_PS_UART_CONSOLE=y
<span style="font-family: arial,helvetica,sans-serif; font-size: 1.3em; line-height: 1.5;">**kernel logs**</span>
rºªÂ3.749085] ff000000.serial: ttyPS0 at MMIO 0xff000000 (irq = 204, base_baud = 6250000) is a xuartps
ªconsole [ttyPS0] enabled
[ 3.758115] console [ttyPS0] enabled
[ 3.765083] bootconsole [uart0] disabled
[ 3.765083] bootconsole [uart0] disabled
[ 3.773082] ff010000.serial: ttyPS1 at MMIO 0xff010000 (irq = 205, base_baud = 6250000) is a xuartps
[ 3.787228] brd: module loaded
Test logs
root@Xilinx-ZCU102-2015_4:~# cat /proc/tty/driver/xuartps
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2016.3
tty: serial: xuartps: Wait for rx and tx done status
Mainline status
Any further changes will be upstreamed.
Related Links
Linux Drivers
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PS UART

November 7, 2016, 6:35 am
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UARTCadence UART PS Linux Driver for Zynq and Zynq Ultrascale+ MPSoC
IntroductionIntroduction
This page gives an overview of the uart-ps driver which is available as part of the Zynq and ZynqMP Linux distribution and in the mainline.
Paths, files, links and documentation on this page are given relative to the Linux kernel source tree.
Features supported
Programmable baud rate generator
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Linux Emaclite Driver

November 7, 2016, 6:40 am
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The purpose of this
AXI EMACLITE Linux driver for Microblaze and Zynq and Zynq Ultrascale+ MPSoC
Introduction
This page gives an overview of Axi EmacliteLinux driver which is available as part of the xilinx Linux distribution or Open source linux distribution.
Features supported
Media Independent Interface (MII) forconnection to documentexternal 10/100 Mb/s PHY transceivers
Independent internal 2K byte TX and RX dual port memory for holding data for one packet
Known Issues and Limitations
None
Work tobe done
Validate the Emaclite driver that ison Zynq Ultrscale+ MPSoc
Kernel Configuration Options
The following config options should be enabled in order to build the mainline kernel.
EmacliteAxi Emaclite driver Kernel Configuration:
CONFIG_ETHERNET
CONFIG_NET_VENDOR_XILINX
CONFIG_XILINX_EMACLITE
{emaclitemenuconfig.png}
Devicetree Bindings:
axi_ethernetlite_1: ethernet@40e00000 {
compatible = "xlnx,axi-ethernetlite-3.0", "xlnx,xps-ethernetlite-1.00.a";
...
} ;
} ;
Testing Tools
Testing Tools-Diagnostic and Protocol TestsTesting Tools-Diagnostic and Protocol TestsDiagnostic and Protocol Tests
PING
This utility used to test the reachability of a host on an Internet Protocol(IP) network and to measure the round trip time for messages sent from the originating host to a destination computer
How to Run
ping <Remote IP Address>
Telnet
telnet <Server IP Address>
Pkt Generator
Please refer the below link for how to run and various options
https://www.kernel.org/doc/Documentation/networking/pktgen.txt
Testing Tools-Stress TestTesting Tools-Stress TestStress Test
Iperf with option -d
Run iperf in dual testing mode. This will cause the server to connect back to the client on the port specified in the -L option (or defaults to the port the client connected to the server on). This is done immediately therefore running the tests simultaneously.
./iperf -c <Server IP> -d
Ping flood test
Users can send hundred or more packets per second using -f option. It prints a ‘.’ when a packet is sent, and a backspace is printed when a packet is received
ping -f localhost
Testing Tools-Performance TestsTesting Tools-Performance TestsPerformance Tests
Netperf
More information please refer the below link
http://www.netperf.org/netperf/
How to Run
Server:
netserver
Client:
taskset 2 ./netperf -H <Server IP> -t TCP_STREAM
taskset 2 ./netperf -H <Server IP> -t UDP_STREAM
Iperf
More information please refer the below link
http://en.wikipedia.org/wiki/Iperf
How to Run
Server:
./iperf -s -u
./iperf -s
Client:
./iperf -c <Server IP> -u -b <banwidth>
./iperf -c <Server IP>
Mainline status
The current driver availble in the xilinx Linux distribution is in sync with the open source driver
Change LOG
2016.3
None
Related Links
Linux Drivers
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Cadence WDT Driver

November 7, 2016, 6:43 am
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Cadence WDT Linux Driver for Zynq and Zynq Ultrascale+ MPSoC
IntroductionIntroductionIntroduction
This page describesgives an overview of the Cadence WDT driver
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is available in mainlineas part of the Zynq and XilinxZynqMP Linux distribution as drivers/watchdog/cadence_wdt.cand in the mainline.
Paths, files, links and documentation on this page are given relative to the Linux kernel source tree.
Features supported
Configurable timeout interval in seconds.
Reset on timeout can be selected.
Known Issues and Limitations
None
Work to be done
None
Kernel Configuration Options
The following config options should be enabled in order to build the wdt driver:
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clocks = <&clk100>;
};
Features supported
Configurable timeout interval in seconds.
Reset on timeout can be selected.
Known Issues and Limitations
None
Testing
Start the watchdog timer and see if it runs out without enabling reset.
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2016.3
None
Mainline status
Any further changes will be upstreamed.
Related Links
Linux Drivers
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Cadence WDT Driver

November 7, 2016, 6:44 am
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Cadence WDT Linux Driver for Zynq and Zynq Ultrascale+ MPSoC
IntroductionIntroductionIntroductionIntroduction
This page gives an overview of the WDT driver which is available as part of the Zynq and ZynqMP Linux distribution and in the mainline.
Paths, files, links and documentation on this page are given relative to the Linux kernel source tree.
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Cadence WDT Driver

November 7, 2016, 6:46 am
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Cadence I2C Driver

November 7, 2016, 6:48 am
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http://www.xilinx.com/support/answers/60694.html
I2C Missing Arbitration On Repeated Start ( http://www.xilinx.com/support/answers/60695.html )
Cadence I2C Driver KernelWork to be done
None
Kernel Configuration Options
The following config options need to be enabled:
CONFIG_I2C_CADENCE
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Zynq UltraScale Plus MPSoC Graphics- GPU application debugging using ARM Mali Graphics Debugger tool

November 7, 2016, 6:49 am
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copy the Mali interceptor.so and mgddaemon from the SD card to /usr/malidebug by entering following commands on the Linux prompt
$mkdir /usr/malidebug
$cp /media/interceptor.so/media/libinterceptor.so /usr/malidebug
$cp /media/mgddaemon /usr/malidebug
set the soft links for interceptor libraries by entering following commands on the Linux prompt
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After running the mgddaemon, observer the prints on the Tera term as show in in below figure
{mgddaemon_running.PNG} Fig: MGD daemon running log
Now run the application on the target side
$cd /media
$tri_cube &
Observer the application running on the monitor connected to the boad.
Now open the Mali Graphics Debugger application in host machine .After the application is opened it looks like as shown
{Mali_Debugger_2.PNG} Fig: Mali Graphics debugger
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BOOT.BIN
image.ub
eglfbdev_gear_applicationtri_cube
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Zynq UltraScale Plus MPSoC Graphics- GPU Profiling using ARM Streamline performance analyzer

November 7, 2016, 6:49 am
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Build the gator.ko module by following below commands
$ cd <Gator_source>/driver
$$bash
$ export <cross compilation path>
$ GATOR_WITH_MALI_SUPPORT=MALI_4xx CONFIG_GATOR_MALI_4XXMP_PATH=<petalinux_project_directory >build/linux/kernel/xlnx-4.4/drivers/staging/mali/DX910-SW-99002-r5p1-01rel0CONFIG_GATOR_MALI_4XXMP_PATH=<petalinux_install_directory>/components/linux-kernel/xlnx-4.4/drivers/staging/mali/DX910-SW-99002-r5p1-01rel0/driver/src/devicedrv/mali/ make -C
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M=`pwd` ARCH=arm64 modulemodules
Note: In the above command, it is mandatory to use the Petalinux project directory which is created in above section.
After the above steps gator.ko kernel module get created under the <Gator_source>/driver directory.
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ARM_Streamline_performance_analyzer.zip is extracted as
Design_files
HDF:containsHDF: contains hardware description
Prebuilt_images
BOOT.BIN
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Zynq UltraScale Plus MPSoC Graphics- GPU application debugging using ARM Mali Graphics Debugger tool

November 7, 2016, 6:50 am
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Now run the application on the target side
$cd /media
$tri_cube$LD_PRELOAD=/usr/malidebug/libinterceptor.so tri_cube&
Observer the application running on the monitor connected to the boad.
Now open the Mali Graphics Debugger application in host machine .After the application is opened it looks like as shown
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Zynq UltraScale Plus MPSoC Graphics- GPU application debugging using ARM Mali Graphics Debugger tool

November 7, 2016, 6:52 am
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BOOT.BIN
image.ub
eglfbdev_gear_applicationtri_cube
libinterceptor.so
mgddemon
...
BOOT.BIN
image.ub
eglfbdev_gear_applicationtri_cube
libinterceptor.so
mgddemon
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Zynq UltraScale Plus MPSoC Graphics- GPU Profiling using ARM Streamline performance analyzer

November 7, 2016, 7:01 am
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Replace the system.hdf located at Xilinx-ZCU102-2016.3/subsystems/linux/hw-description/ with the system.hdf file provided in release files and run the following command:
$ petalinux-config --oldconfig
RunReplace the below command under Petalinux project direcotory
$ Petalinux-config –c rootfs
Configure configuration file supplied with this tech tip, with the below options and saveconfiguration file under the directory <Petalinux_project_directory>/subsystem/linux/configs/rootfs/config Note: Find the rootfs configuration file
Filesystem Packages → devel → libmali-xlnxà libmali-dev
Filesystem Packages → base → libmali-xlnx -->libmali1 at <Local_directory>/Desing_files/Rootfs_configuration/ directory.
After the above steps run the command shown below to configure the rootfs and save.
$petalinux-config -c rootfs
Add the following configuration options in the file <Petalinux_project_directory>/build/linux/kernel/xlnx-4.4/.config to enable the profiling option and save the file.
CONFIG_PRINTK_TIME=y
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gatord
gator.ko
eglfbdev_gear_application (Copytri_cube(Copy this application
Installing ARM Streamline performance analyzer tool on windows machine :
In this section goes through the procedure for installing streamline performance analyzer tool on windows machine.
...
Now Run the example eglfbdev_gears_application by following below commands.
$ export DISPLAY=:0.0
$ ./eglfbdev_gears_application./tri_cube&
Observer the application running on the display connected the board.
Now open the ARM DS-5 Streamline performance analyzer tool and provide the target IP address in the box marked in the below shown figure
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Design_files
HDF: contains hardware description file
Rootfs_configuration: contains root filesystem configuration file
Prebuilt_images
BOOT.BIN
...
gatord
gator.ko
eglfbdev_gears_applicationtri_cube
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frame_analysis

November 7, 2016, 7:10 am
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