Help needed Linux-2.6 - MPC8541

Junita

Sorry to disturbed you. I find your question in the http://ozlabs.org mail list. Have you fixed the bug in gianfar_phy.c?
tempval = gfar_read(&priv-> regs-> dmactrl);
tempval |= (DMACTRL_GRS | DMACTRL_GTS);
gfar_write(&priv-> regs-> dmactrl, tempval);

while (!(gfar_read(&priv-> regs-> ievent) & (IEVENT_GRSC | IEVENT_GTSC))) cpu_relax();

/* Reset MAC layer */
gfar_write(&priv-> regs-> maccfg1, MACCFG1_SOFT_RESET);

I buy a RMC-G8500 card from GDAtech, I try to build linux-2.6.13.4 from kernel.org and meet the same problems as you had. I test the same code on freescale 8540_ADS board, it is good.Can you share some infomation of your progress?

Thank you!
Jian

I'm a bit confused by the statement above. The code you present is from gianfar.c, and is certainly not a bug. It is possible you are using an older version of the code, which has a bug, which is fixed by adding these lines above the code you show:

        tempval = gfar_read(&priv->regs->dmactrl);
        tempval &= ~(DMACTRL_GRS | DMACTRL_GTS);
        gfar_write(&priv->regs->dmactrl, tempval);

This fixes a problem where setting GRS and GTS when they're already set doesn't initiate the graceful stop. But if you are using 2.6.13, you should have this fix. I suspect that, like I told Junita, you need to make sure the platform code has the right CCSRBAR value set up.

I'm not familiar with this card. Are you sure there's support for it in your source tree?

Andy Fleming