On 1/15/07, Javi Roman <[EMAIL PROTECTED]> wrote:
On 1/13/07, Wolfgang Grandegger <[EMAIL PROTECTED]> wrote:
>
> Hallo,
>
> some more comments to this Email...
>
> >
> > 1. Driver load:
> > [EMAIL PROTECTED]:/realtime/rtnet/sbin# insmod mpc8xx_fec-rt.o
> > RTnet: registered rteth0
> > rteth0: FEC ENET Version 0.3, irq 7, addr 00:a0:26:23:57:2c
> > rteth0: FEC with MDIO disable
> >
> > 2. Inteface open (with network wire connected):
> > [EMAIL PROTECTED]:/realtime/rtnet/sbin# ./rtifconfig rteth0 up 10.10.10.1
> > fec_restart: restarting FEC, duplex = 1
>
> Why is fec_restart called from fec_open()? If MDIO is disabled,
> fec_enet_restart() is called in fec_enet_init() with duplex = 0. The
> MDIO code is a reminder from the original code and is just left in place
> to simplify porting of MDIO later on.
fec_enet_restart() It's called from fec_open() only for my own testing
proposues, I'm running all sort of tests ...
I'll send you a mail when I have a solution for this problem, for you
information, even if it's a specific problem of my configuration.
best regards.
Ok, I've got it!
The problem is with this piece of code:
fec_enet_init(void):
/* Initialize the receive buffer descriptors.
*/
bdp = fep->rx_bd_base;
k = 0;
for (i=0; i<FEC_ENET_RX_PAGES; i++) {
/* Allocate a page.
*/
ba = (unsigned char *)consistent_alloc(GFP_KERNEL,
PAGE_SIZE, (void *)&mem_addr);
/* Initialize the BD for every fragment in the page.
*/
for (j=0; j<FEC_ENET_RX_FRPPG; j++) {
bdp->cbd_sc = BD_ENET_RX_EMPTY;
bdp->cbd_bufaddr = mem_addr;
fep->rx_vaddr[k++] = ba;
mem_addr += FEC_ENET_RX_FRSIZE;
ba += FEC_ENET_RX_FRSIZE;
bdp++;
}
}
The function consistent_alloc() is not working correctly, mem_addr is not
getting the physicall address of the bus, is getting a virtual address, so
if I change the line:
bdp->cbd_bufaddr = mem_addr;
with
bdp->cbd_bufaddr = __pa(mem_addr);
The driver works correctly.
Without this change, I get FEC_ENET_EBERR (Ethernet bus FEC ERROR) when I
connect the network wire and FEC is disabled (clearing the bit ETHER_EN).
I supouse that it's a bug of 2.4.18 kernel code for PPC.
Thanks a lot!
--
Javi Roman.
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