racerxdl / odroidu3-5.1.md

Compiling Kernel 5.1 for Odroid U3 https://github.com/umiddelb/armhf/wiki/How-To-compile-a-custom-Linux-kernel-for-your-ARM-device#examples Apply patch for smsc mac address: https://netdev.vger.kernel.narkive.com/Fi2roLel/patch-smsc95xx-add-module-parameter-to-override-mac-address Or use https://github.com/racerxdl/linux-odroid-public ```bash sudo apt-get install gcc-arm-linux-gnueabihf g++-arm-linux-gnueabihf export ARCH=arm export CROSS_COMPILE=arm-linux-gnueabihf- make exynos_defconfig make menuconfig ( i need to enable some modules to make the the usb keyboard work) make -j5 zImage modules dtbs make modules_install ARCH=arm INSTALL_MOD_PATH=../modules cat arch/arm/boot/zImage arch/arm/boot/dts/exynos4412-odroidu3.dtb > zImage_dtb ``` On device ```bash $ sudo update-initramfs -c -k ${kver} $ sudo mkimage -A arm -O linux -T ramdisk -a 0x0 -e 0x0 -n initrd.img-${kver} -d initrd.img-${kver} uInitrd-${kver} $ sudo cp uInitrd-${kver} /media/boot/uInitrd ``` Edit `/media/boot/boot.txt`: add to kernel line ``` smsc95xx.macaddr=96:e3:f1:9a:b0:8a ``` Generate boot.scr: ```bash mkimage -A arm -T script -C none -n "Boot.scr for ODROID" -d /media/boot/boot.txt /media/boot/boot.scr ```

diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c index 3135af6..0ba06d9 100644 --- a/drivers/net/usb/smsc95xx.c +++ b/drivers/net/usb/smsc95xx.c @@ -46,6 +46,7 @@ #define SMSC95XX_INTERNAL_PHY_ID (1) #define SMSC95XX_TX_OVERHEAD (8) #define SMSC95XX_TX_OVERHEAD_CSUM (12) +#define MAC_ADDR_LEN (6) struct smsc95xx_priv { u32 mac_cr; @@ -63,6 +64,10 @@ static int turbo_mode = true; module_param(turbo_mode, bool, 0644); MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction"); +static char *macaddr = ":"; +module_param(macaddr, charp, 0); +MODULE_PARM_DESC(macaddr, "MAC address"); + static int smsc95xx_read_reg(struct usbnet *dev, u32 index, u32 *data) { u32 *buf = kmalloc(4, GFP_KERNEL); @@ -637,8 +642,59 @@ static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL); } +/* Check the macaddr module parameter for a MAC address */ +static int smsc95xx_is_macaddr_param(struct usbnet *dev, u8 *dev_mac) +{ + int i, j, got_num, num; + u8 mtbl[MAC_ADDR_LEN]; + + if (macaddr[0] == ':') + return 0; + + i = 0; + j = 0; + num = 0; + got_num = 0; + while (j < MAC_ADDR_LEN) { + if (macaddr[i] && macaddr[i] != ':') { + got_num++; + if ('0' <= macaddr[i] && macaddr[i] <= '9') + num = num * 16 + macaddr[i] - '0'; + else if ('A' <= macaddr[i] && macaddr[i] <= 'F') + num = num * 16 + 10 + macaddr[i] - 'A'; + else if ('a' <= macaddr[i] && macaddr[i] <= 'f') + num = num * 16 + 10 + macaddr[i] - 'a'; + else + break; + i++; + } else if (got_num == 2) { + mtbl[j++] = (u8) num; + num = 0; + got_num = 0; + i++; + } else { + break; + } + } + + if (j == MAC_ADDR_LEN && !macaddr[i]) { + netif_dbg(dev, ifup, dev->net, "Overriding MAC address with: " + "%02x:%02x:%02x:%02x:%02x:%02x\n", mtbl[0], mtbl[1], mtbl[2], + mtbl[3], mtbl[4], mtbl[5]); + for (i = 0; i < MAC_ADDR_LEN; i++) + dev_mac[i] = mtbl[i]; + return 1; + } else { + return 0; + } +} + static void smsc95xx_init_mac_address(struct usbnet *dev) { + /* Check module parameters */ + if (smsc95xx_is_macaddr_param(dev, dev->net->dev_addr)) + return; + /* try reading mac address from EEPROM */ if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, dev->net->dev_addr) == 0) {