Not able to pass MAC address from uboot to kernel

Hi Saurin,

From the above steps every thing looks ok. Try saving it (saveenv) and reset and issue print ethaddr at

u-boot prompt and see that you get the same MAC address. Refer this link for setting MAC address.

Thx,

--Prabhakar Lad

Hi Prabhakar,

thanks for your reply,

Please note that we are using PCIe boot, we don't have any flash connected in our custom Netra board. so saveenv will not have any effect, we are getting MAC address in OCMC memory from PCIe Rootcomplex. and that MAC address is used in setting ethaddr environment variable, when we pass ethaddr to kernel via bootargs, kernel override the MAC address.

Regards,

Saurin

Hi Saurin,

Ok. Can you print the bootlog, when linux comes up it prints the command line can you check

that if it is the same as what you passed?

Thx,

--Prabhakar Lad

Hi Prabhakar,

From Linux kernel i kept printk for MAC address printing, it prints the different MAC address(Not the MAC address we passed from uboot), however in booting log i can see that MAC address passed properly with bootargs, but when ethernet driver initialize it prints the differnt mac address

-Saurin

Hi Saurin,

So looks like the ethernet driver is not taking the MAC address from bootargs. So you need to look

at the ethernet driver and see from it does it take the MAC address.

Thx,

--Prabhakar Lad

Hi Saurin,

Can you provide your environment variables and bootlog with "ifconfig from console"

Regards

AnilKumar

Please mark this Forum post as answered via the Verify Answer button below if it helps answer your question.  Thanks!

Hi Anil,

Here is the detail

TI8168#printenv
bootdelay=3
baudrate=115200
autoload=no
verify=yes
addip=setenv bootargs ${bootargs} ip=${ipaddr}:${nfsserver}:${gatewayip}:${subnetmask}:${hostname}:eth0:off eth=${ethaddr}
ethaddr=02:01:03:01:01:01
ethact=DaVinci EMAC
ipaddr=10.194.58.86
gatewayip=10.194.58.1
subnetmask=255.255.255.0
serverip=10.194.58.126
ncip=10.194.58.126
bootargs=console=ttyO0,115200n8 root=/dev/ram rw initrd=0x81000000,128M mem=512M
bootcmd=setenv hostname cloverdale;tftp 0x80800000 uImage; tftp 0x81000000 128mb.gz;run addip; bootm 0x80800000
ver=U-Boot 2010.06 (May 20 2012 - 23:50:46)

Environment size: 839/8188 bytes


TI8168#boot                     

## Booting kernel from Legacy Image at 80800000 ...
   Image Name:   Linux-2.6.37
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    2259424 Bytes = 2.2 MiB
   Load Address: 80008000
   Entry Point:  80008000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK
OK

Starting kernel ...

Linux version 2.6.37 (root@netradev-desktop) (gcc version 4.3.3 (Sourcery G++ Lite 2009q1-203) ) #27 Tue May 22 00:00:52 PDT 2012
CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c53c7f
CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache
Machine: ti8168evm
reserved size = 0 at 0
Memory policy: ECC disabled, Data cache writeback
OMAP chip is TI8168 1.1
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 130048
Kernel command line: console=ttyO0,115200n8 root=/dev/ram rw initrd=0x81000000,128M mem=512M ip=10.194.58.86::10.194.58.1:255.255.255.0:cloverdale:eth0:off eth=02:01:03:01:01:01
PID hash table entries: 2048 (order: 1, 8192 bytes)
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
Memory: 512MB = 512MB total
Memory: 383840k/383840k available, 140448k reserved, 0K highmem
Virtual kernel memory layout:
    vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
    DMA     : 0xffc00000 - 0xffe00000   (   2 MB)
    vmalloc : 0xe0800000 - 0xf8000000   ( 376 MB)
    lowmem  : 0xc0000000 - 0xe0000000   ( 512 MB)
    modules : 0xbf000000 - 0xc0000000   (  16 MB)
      .init : 0xc0008000 - 0xc0034000   ( 176 kB)
      .text : 0xc0034000 - 0xc0447000   (4172 kB)
      .data : 0xc0448000 - 0xc0485920   ( 247 kB)
SLUB: Genslabs=11, HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
NR_IRQS:407
IRQ: Found an INTC at 0xfa200000 (revision 5.0) with 128 interrupts
Total of 128 interrupts on 1 active controller
GPMC revision 6.0
Trying to install interrupt handler for IRQ400
Trying to install interrupt handler for IRQ401
Trying to install interrupt handler for IRQ402
Trying to install interrupt handler for IRQ403
Trying to install interrupt handler for IRQ404
Trying to install interrupt handler for IRQ405
Trying to install interrupt handler for IRQ406
Trying to install type control for IRQ407
Trying to set irq flags for IRQ407
OMAP clockevent source: GPTIMER1 at 27000000 Hz
Console: colour dummy device 80x30
Calibrating delay loop... 986.31 BogoMIPS (lpj=4931584)
pid_max: default: 32768 minimum: 301
Security Framework initialized
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
devtmpfs: initialized
omap_voltage_early_init: voltage driver support not added
regulator: core version 0.5
regulator: dummy:
NET: Registered protocol family 16
OMAP GPIO hardware version 0.1
OMAP GPIO hardware version 0.1
omap_mux_init: Add partition: #1: core, flags: 0
_omap_mux_get_by_name: Could not find signal i2c2_scl.i2c2_scl
_omap_mux_get_by_name: Could not find signal i2c2_sda.i2c2_sda
registered ti816x_vpss device
pm_dbg_init: only OMAP3 supported
Registered ti81xx_fb device
ti816x_pcie: Invoking PCI BIOS...
ti816x_pcie: Setting up Host Controller...
ti816x_pcie: Register base mapped @0xe0820000
ti816x_pcie: Starting PCI scan...
PCI: bus0: Fast back to back transfers disabled
PCI: bus1: Fast back to back transfers enabled
pci 0000:00:00.0: PCI bridge to [bus 01-01]
pci 0000:00:00.0:   bridge window [io  disabled]
pci 0000:00:00.0:   bridge window [mem disabled]
pci 0000:00:00.0:   bridge window [mem pref disabled]
PCI: enabling device 0000:00:00.0 (0142 -> 0143)
bio: create slab <bio-0> at 0
vgaarb: loaded
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
omap_i2c omap_i2c.1: bus 1 rev4.0 at 100 kHz
omap_i2c omap_i2c.2: bus 2 rev4.0 at 100 kHz
Advanced Linux Sound Architecture Driver Version 1.0.23.
Switching to clocksource gp timer
musb-hdrc: version 6.0, host, debug=0
musb-hdrc musb-hdrc.0: dma type: dma-cppi41
registerd cppi-dma Intr @ IRQ 17
Cppi41 Init Done
musb-hdrc: kernel must blacklist external hubs
musb-hdrc musb-hdrc.0: MUSB HDRC host driver
musb-hdrc musb-hdrc.0: new USB bus registered, assigned bus number 1
usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb1: Product: MUSB HDRC host driver
usb usb1: Manufacturer: Linux 2.6.37 musb-hcd
usb usb1: SerialNumber: musb-hdrc.0
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
musb-hdrc musb-hdrc.0: USB Host mode controller at e080c000 using DMA, IRQ 18
musb-hdrc musb-hdrc.1: dma type: dma-cppi41
musb-hdrc: kernel must blacklist external hubs
musb-hdrc musb-hdrc.1: MUSB HDRC host driver
musb-hdrc musb-hdrc.1: new USB bus registered, assigned bus number 2
usb usb2: New USB device found, idVendor=1d6b, idProduct=0002
usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb2: Product: MUSB HDRC host driver
usb usb2: Manufacturer: Linux 2.6.37 musb-hcd
usb usb2: SerialNumber: musb-hdrc.1
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 1 port detected
musb-hdrc musb-hdrc.1: USB Host mode controller at e081e800 using DMA, IRQ 19
NET: Registered protocol family 2
IP route cache hash table entries: 4096 (order: 2, 16384 bytes)
TCP established hash table entries: 16384 (order: 5, 131072 bytes)
TCP bind hash table entries: 16384 (order: 4, 65536 bytes)
TCP: Hash tables configured (established 16384 bind 16384)
TCP reno registered
UDP hash table entries: 256 (order: 0, 4096 bytes)
UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
NET: Registered protocol family 1
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
Trying to unpack rootfs image as initramfs...
rootfs image is not initramfs (no cpio magic); looks like an initrd
Freeing initrd memory: 131072K
NetWinder Floating Point Emulator V0.97 (double precision)
sr1_fck HVT rate = 125000000
sr2_fck SVT rate = 125000000
SR NTarget value for HVT 0x998390
SR NTarget value for SVT 0xaabbd6
SmartReflex Driver initialized
omap-iommu omap-iommu.0: ducati registered
omap-iommu omap-iommu.1: sys registered
msgmni has been set to 1005
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
omap_uart.0: ttyO0 at MMIO 0x48020000 (irq = 72) is a OMAP UART0
console [ttyO0] enabled
omap_uart.1: ttyO1 at MMIO 0x48022000 (irq = 73) is a OMAP UART1
omap_uart.2: ttyO2 at MMIO 0x48024000 (irq = 74) is a OMAP UART2
brd: module loaded
loop: module loaded
ahci ahci.0: forcing PORTS_IMPL to 0x3
ahci ahci.0: AHCI 0001.0100 32 slots 2 ports 3 Gbps 0x3 impl platform mode
ahci ahci.0: flags: ncq sntf pm led clo only pmp pio slum part ccc
scsi0 : ahci_platform
scsi1 : ahci_platform
ata1: SATA max UDMA/133 mmio [mem 0x4a140000-0x4a150fff] port 0x100 irq 16
ata2: SATA max UDMA/133 mmio [mem 0x4a140000-0x4a150fff] port 0x180 irq 16
usbcore: registered new interface driver cdc_ether
usbcore: registered new interface driver dm9601
Initializing USB Mass Storage driver...
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
mice: PS/2 mouse device common for all mice
i2c /dev entries driver
Linux video capture interface: v2.00
usbcore: registered new interface driver uvcvideo
USB Video Class driver (v1.0.0)
OMAP Watchdog Timer Rev 0x00: initial timeout 60 sec
PSTATE 1ff0000
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
usbcore: registered new interface driver snd-usb-audio
1-0018 supply IOVDD not found, using dummy regulator
1-0018 supply DVDD not found, using dummy regulator
1-0018 supply AVDD not found, using dummy regulator
1-0018 supply DRVDD not found, using dummy regulator
asoc: tlv320aic3x-hifi <-> davinci-mcasp.2 mapping ok
ALSA device list:
  #0: TI81XX EVM
TCP cubic registered
NET: Registered protocol family 17
VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 3
omap_voltage_late_init: Voltage driver support not added
ata2: SATA link down (SStatus 0 SControl 300)
ata1: SATA link down (SStatus 0 SControl 300)
net eth0: no phy, defaulting to 1000/full
     host=cloverdale, domain=, nis-domain=(none),
     bootserver=255.255.255.255, rootserver=255.255.255.255, rootpath=
RAMDISK: gzip image found at block 0
VFS: Mounted root (ext2 filesystem) on device 1:0.
devtmpfs: mounted
Freeing init memory: 176K
INIT: version 2.86 booting
Starting udev
udevd (51): /proc/51/oom_adj is deprecated, please use /proc/51/oom_score_adj instead.
Remounting root file system...
Caching udev devnodes
Populating dev cachemv: cannot rename '/tmp/devices': No such file or directory
logger: mount: mounting tmpfs on /media/ram failed: No such file or directory
ALSA: Restoring mixer settings...
hwclock: can't open '/dev/misc/rtc': No such file or directory
Wed Apr  6 00:18:00 UTC 2011
hwclock: can't open '/dev/misc/rtc': No such file or directory
INIT: Entering runlevel: 5
Starting system message bus: dbus.
Starting telnet daemon.
Starting syslogd/klogd: done

 _____                    _____           _         _
|  _  |___ ___ ___ ___   |  _  |___ ___  |_|___ ___| |_
|     |  _| .'| . | . |  |   __|  _| . | | | -_|  _|  _|
|__|__|_| |__,|_  |___|  |__|  |_| |___|_| |___|___|_|
              |___|                    |___|

Arago Project http://arago-project.org dm816x-evm ttyO0

Arago 2011.02 dm816x-evm ttyO0

dm816x-evm login: root
root@dm816x-evm:~# ifconfig
eth0      Link encap:Ethernet  HWaddr 40:5F:C2:71:9B:7C
          inet addr:10.194.58.86  Bcast:10.194.58.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:14 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1483 (1.4 KiB)  TX bytes:0 (0.0 B)
          Interrupt:40

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
root@dm816x-evm:~#

I don't think the "eth=" kernel command line parameter is standard Linux. I can't find support for it in the Arago Linux SCBP git. Did you add support for it? Grep for a __setup() call that takes an "eth" argument. As coded, the mac address is read from the control registers in devices.c.

Hi

"eth=" command line argument is depreciated from the standard Linux kernel.

Mac address reading logic is done in the arch/arm/mach-omap2/devices.c file. This logic can be modified to have custom mac id from eeprom or i2c so that custom mac id is used in kernel emac driver.

with regards

Mugunthan V N

Hi,

As suggested, i applied patch in drivers/net/davinci_emac.c for getting "eth=" argument.

Thanks for helping me.

Regards,

Saurin

Hi,

I have similar issue, My card doesn't have a EEPROM. I cannot read the EEPROM for MAC address in kernel.

Can you show me your patch? I am new about how the kernel get argument from the boot command line.

Thank you in advance!

Jin

Jin

You can refer to the file in the below link and implement the same for adding MAC address in Driver
http://lxr.linux.no/#linux+v3.5.4/net/ipv4/ipconfig.c#L1624

Regards
Mugunthan V N

Thanks a lot!

Jin

Hi,

I have similar issue with TCI6614 platform. I plan to pass MAC address from uboot to the kernel. Could you post the patch here?

Regards

Shailender

Hi Shailender,

I fixed using following patch.

drivers/net/davinci_emac.c
@@ -59,11 +59,13 @@
+#include <linux/string.h>
@
@ -1787,6 +1805,12 @@
        struct device *emac_dev;
        struct cpdma_params dma_params;
 
+      unsigned char addr[6];
+      char *ptr = NULL;
+      char *ptr_end;
+      char eth[17];
+      Int mac_byte_counter;
 
@@ -1818,7 +1842,23 @@
      
        /* MAC addr and PHY mask , RMII enable info from platform_data */
-       memcpy(priv->mac_addr, pdata->mac_addr, 6);
+
+      ptr = strstr(boot_command_line, "eth=");
+      if (ptr) {
+       memcpy(eth, ptr + 4, 17 * sizeof(char));
+       printk(KERN_NOTICE "ethaddr parsed from commandline: %s\n", eth);
+       ptr_end = eth;
+       for (mac_byte_counter = 0; mac_byte_counter <= 5; mac_byte_counter ++) {
+               addr[mac_byte_counter] = simple_strtol(ptr_end, &ptr_end, 16) | simple_strtol(ptr_end, &ptr_end, 16) << 4;
+               ptr_end++; /* skip ":" in  eth*/
+              }
+     }
+memcpy(priv->mac_addr, addr, sizeof(addr));
+memcpy(pdata->mac_addr, addr, sizeof(addr));

Thanks Saurin.