2008-06-05 15:06:02 Wake On Lan Support

Patrick Roye (UNITED STATES)

Message: 56757

I am working on a project that requires wake-on-lan support on a BF537-stamp board. From reading through the forums and looking at the bfin_mac driver it seems that this functionality is not yet supported. If this is indeed the case, will this functionality be available in the driver anytime soon? Is there anything I could do to help provide this functionality? I have moderate experience writing kernel drivers, and I wouldn't mind taking a stab at it. Thanks.

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2008-06-05 15:36:27 Re: Wake On Lan Support

Mike Frysinger (UNITED STATES)

Message: 56760

adding WOL support should be pretty easy ... you just need to implement the get_wol/set_wol functions of the ethtool struct in bfin_mac.c. there is an open tracker item to finish implementing all the ethtool ops here:

http://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=3835

but i dont believe there is a timeframe on it

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2008-06-05 19:48:26 Re: Wake On Lan Support

Patrick Roye (UNITED STATES)

Message: 56774

I tried a lot of things today, but I was never able to get anything to work. Right now I'm just trying to get the board to successfully wake up on receiving a magic packet, though I also attempted both wake on remote frame and global unicast. In my last attempt, I rewrote the bfin_mac_suspend() function as follows:

static int bfin_mac_suspend(struct platform_device *pdev, pm_message_t mesg)

{

unsigned int opmode;

// if (netif_running(net_dev))

// bfin_mac_close(net_dev);

opmode = bfin_read_EMAC_OPMODE();

opmode |= RE;

opmode &= (~TE);

bfin_write_EMAC_OPMODE(opmode);

bfin_write_EMAC_WKUP_CTL( MPKE );

return 0;

}

I had hoped that not closing the device on suspend might do the trick, but no such luck. Any suggestions?

Thanks.

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2008-06-05 22:43:02 Re: Wake On Lan Support

Mike Frysinger (UNITED STATES)

Message: 56778

if you dont enable the PHYWE bit in VR_CTL, then it really doesnt matter how the MAC is configured as it will be masked as a wake up source

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2008-06-06 12:04:13 Re: Wake On Lan Support

Patrick Roye (UNITED STATES)

Message: 56822

What I understand from the Hardware Reference Manual is that setting the PHYWE bit in VR_CTL is used for coming out of a hibernate. I'm trying to make WOL work from a sleep performed by "echo 'standby' > /sys/power/state". Regardless, I tried adding the following to the suspend function:

bfin_write_VR_CTL( bfin_read_VR_CTL() | PHYWE );

enable_irq_wake( IRQ_MAC_RX );

bfin_write_SIC_IWR( IWR_ENABLE_ALL );

Still no wake-ups on the processor though. Anything else I should try?

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2008-06-09 03:36:41 Re: Wake On Lan Support

Michael Hennerich (GERMANY)

Message: 56854

PHYWE is only used during transitions from hibernate state - similar to reset.

What is your default Power Saving Mode ?

[*] Power Management support

[ ] Legacy Power Management API (DEPRECATED)