Steps to get WLINK using Petalinux on MicroZed

Ok I think I have teh device tree modified, I did not realize that new items needed to be in the first set of curly braces.

I am having trouble setting the necessary configuration items for the kernel.  If I use the TI script, the items get written but then get overwritten if I do a petalinux-build.  I assume I want to modify the configs, build the kernel with the new configs and then build the TI drivers but I am having trouble matching config items with petalinux config.  If I manually modify the config file in the petalinux subsystem tree I get build errors

I have it working, here are the detailed stepss to build Petalinux 2014.4, release 8.6 of the TI drivers for microzed.

Here is a summary of the steps I had to implement to get Petalinux 2014.4 and Wilink adapter working on the Microzed.

Step 1. Download the TI driver using the build utilities script.

git://git.ti.com/wilink8-wlan/build-utilites.git

Step 2. Apply patch to kernel

Allow subnodes for wlcore to be used with SDIO, this patch is included in the above build utilities, note that it will not be applied automatically since the xlnx-3.17 kernel does not have patches associated with it.

Step 3. Reconfigure the kernel

Enable the necessary settings, I was able to find all but one setting in the petalinux configuration this was CONFIG_
WIRELESS_EXT.  In petalinux this appears to be private.  To make this visible I modified the Kconfig in components/linux-kernel/xlnx-3.17/net/wireless/  as shown

config WIRELESS_EXT
    bool    "Enable Wireless Extentions"
    default n

Then run petalinux-config -c kernel, each line shows the text menu items

Cryptographic API

CCM Support

GCM Support

EC8 Support

Michael Mic keyed digest algorithm

Arc4 cipher algorithm

Library Functions

CRC 7 Functions

Device Drivers

Input Device Support

Misc...Devices

User Level Driver Support

Networking

RF Switch subsystem support

Security Options

Enable Access Key Retention Support

Enable Different Security Modules

Step 4. Build Petalinux with these settings

Step 5. Modify setup-env

In this case I have created a petalinux app that will copy the fs directory to the TARGET ROOT, this allows me to make updates to the configuration without wiping out files I put directly into target root.  My setup-env is shown below.  I will cover the app for copying later.

                            //
#                           -(o o)-
#========================oOO==(_)==OOo=======================
# This file contains the exports needed for automating the
# build process of WLAN components.
# Place this file in the same directory with wl18xx_build.sh
# build scripts. No need to run 'source setup-env', the build
# scripts will perfom it internaly.
#===========================================================
# User specific environment settings - use full PATH

# if DEFAULT toolchain path is set toolchain will be downloaded to ./toolchain.
export TOOLCHAIN_PATH=/opt/pkg/petalinux-v2014.4-final/tools/linux-i386/arm-xilinx-linux-gnueabi/bin

# if DEFAULT path to root filesystem is set ./fs folder will be used.
export ROOTFS=~/Embedded/wlink_test/software/wlink/components/apps/wireless/fs
#export ROOTFS=DEFAULT

#if DEFAULT kernel path is set - kernel will be downloaded (set branch to match kernel version)
export KERNEL_PATH=~/Embedded/wlink_test/software/wlink/build/linux/kernel/xlnx-3.17

# if KERNEL_VARIANT below is set the build script will look for kernel specific
# patches under the patches directory:
# - patches under the pathces/driver_patches/$KERNEL_VARIANT directory would be
#   applied during "modules" build.
# - patches under the patches/kernel_patches/$/$KERNEL_VARIANT directory would
#   be applied to the kernel pointed by KERNEL_PATH in case the "patch_kernel"
#   command is used.
#   Note: the kernel is not built automatically after the patches are applied
export KERNEL_VARIANT=xlnx-3.17

export CROSS_COMPILE=arm-xilinx-linux-gnueabi-
export ARCH=arm
[ "$TOOLCHAIN_PATH" != "DEFAULT" ] && export PATH=$TOOLCHAIN_PATH:$PATH

Step 6. Create Petalinux App

a. I created a petalinux app called wireless, deleted the C file and modified the make file as shown

b. create fs subdriectory for copying files in

ifndef PETALINUX
$(error "Error: PETALINUX environment variable not set.  Change to the root of your PetaLinux install, and source the settings.sh file")
endif

include apps.common.mk

APP = settings

all: build install

.PHONY: build
build:

install:
    # Copy settings files to the rootfs.
    cp -r ./fs/* $(TARGETDIR)


clean:

Step 7.  Add startup of modules to /etc/modules in fs directory

# /etc/modules: kernel modules to load at boot time.
#
# This file contains the names of kernel modules that should be loaded
# at boot time, one per line. Lines beginning with "#" are ignored.
# Parameters can be specified after the module name.

wlcore_sdio
wl18xx


Step 8. Add wl18xx-conf.bin to fs directory (need to generate this)

/fs/lib/firmware/ti-connectivity/wl18xx-conf.bin

Step 9. Run the build script using update R8.6

Step 9. Fix issue with Precistion Timing GPIO

When going to 8.6 there is a new requirement for a GPIO which is not on the microzed for a precision timing output.  This will preclude the driver from loading.  Comment out the request for this line in the following file.

src/driver//drivers/net/wireless/ti/wlcore/main.c (approx line 6450)

#if 0  <--- do this
    /* time sync */
    wl->time_sync.gpio = 66;
    ret = gpio_request_one(wl->time_sync.gpio, GPIOF_DIR_OUT, "time_sync");
    if (ret < 0) {
        wl1271_error("error requesting time_sync gpio");
        goto err_buffer_32;
    }
    wl1271_info("Time Sync: gpio requested");
#endif <--- and this

Step 10. Rebuild the TI drivers,

Do not use update or your change will be lost

Step 11. Update device tree.

All the info I found was for flat trees, this is the latest format assuming using the petalinux structure for a microzed, you should only need to change which SDIO you are using and which gpio pin is used for enable and which is used for the interrupt for a custom board...

/dts-v1/;
/include/ "system-conf.dtsi"
/ {
    wlan_en: fixedregulator@2 {
        compatible = "regulator-fixed";
        regulator-name = "wlan-en-regulator";
        regulator-min-microvolt = <0x325aa0>;
        regulator-max-microvolt = <0x325aa0>;
        gpio = <&gpio0 0x9 0x4>;              <<<<<<<<< gpio 9
        startup-delay-us = <0x11170>;
        enable-active-high;
    };
};

&gem0 {
    phy-handle = <&phy0>;
    phy-mode = "rgmii-id";
       
    mdio {
        #address-cells = <1>;
        #size-cells = <0>;
        phy0: phy@0 {
            compatible = "marvell,88e1510";
            device_type = "ethernet-phy";
            reg = <0x0>;
            marvell,reg-init = <3 16 0xff00 0x1e 3 17 0xfff0 0x00>;
        };
    };
};

&qspi {
    flash0: flash@0 {
                  compatible = "micron,n25q128a13";
    };
};

&gpio0 {                               <<<<< make gpio an int controller for gpio ints
interrupt-controller;
    #interrupt-cells = <2>;
};

&sdhci1{                                         <<<<<<< SDIO 1
    vmmc-supply = <&wlan_en>;
    bus-width = <4>;
    ti,non-removable;
    ti,needs-special-hs-handling;
    cap-power-off-card;
    keep-power-in-suspend;

    #address-cells = <1>;
    #size-cells = <0>;

    wlcore: wlcore@0 {
        compatible = "ti,wl1835";
        interrupt-parent = <&gpio0>;
        interrupts = <0 4>;                        <<<<<<GPIO pin 0, note GPIO is used as int parent
        reg = <2>;
        platform-quirks = <0x1>;
        board-ref-clock = <0x4>;
    };
};

&uart0 {
    current-speed = <115200>;
    device_type = "serial";
    port-number = <1>;
    status = "disabled";
};

Step 12. Image will be too big

If using the default settings for memory, I wont go into alot of detail since this is well documented but loadaddr and netstart will need to be modified to allow copying the image, this is accomplished through petalinux config.

You will need to regenerate BOOT.BIN to load the new kernel.

You will also need to modify the MACRO CONFIG_SYS_BOOT_LEN which is not accessible is petalinux config, it can be changed bu editing the platform-top in the u-boot files.  All other files are generated so this can not be done where it is initially defined by petalinux.  Modify it as such

./subsystems/linux/configs/u-boot/platform-top.h ---

#include <configs/platform-auto.h>

#undef CONFIG_SYS_BOOTM_LEN

/* Make the BOOTM LEN big enough for the compressed image */
#define CONFIG_SYS_BOOTM_LEN 0x4000000

I used git but the build utilities I got has no folder called build-utilities.  It only has patches in some sub folders.  Is it supposed to get you the source code instead of just patches?

I finally can get to the git, which is simple using web.  But my question is, in step 2, which patch file did you use to apply?