[U-Boot] [PATCH 03/11] arm: ks8695eth: Use MAC address from environment

[Yann Vernier]

On Thu, 18 Oct 2012 15:55:31 -0500
Joe Hershberger <joe.hershberger at gmail.com> wrote:

> Hi Yann,
> 
> On Fri, Oct 5, 2012 at 7:09 AM, Yann Vernier <yann.vernier at orsoc.se>
> wrote:
> > Removed board specific MAC reading code from driver.
> > Should move the reading to the cm4008/cm41xx board code.
> > ---
> >  drivers/net/ks8695eth.c |   38
> > +++++++++----------------------------- 1 file changed, 9
> > insertions(+), 29 deletions(-)
> >
> > diff --git a/drivers/net/ks8695eth.c b/drivers/net/ks8695eth.c
> > index b4904b6..2dda7ab 100644
> > --- a/drivers/net/ks8695eth.c
> > +++ b/drivers/net/ks8695eth.c
> > @@ -71,30 +71,13 @@ volatile uint8_t
> > ks8695_bufs[BUFSIZE*(TXDESCS+RXDESCS)] __attribute__((aligned(2
> >
> >  /****************************************************************************/
> >
> > -/*
> > - *     Ideally we want to use the MAC address stored in flash.
> > - *     But we do some sanity checks in case they are not present
> > - *     first.
> > - */
> > -unsigned char eth_mac[] = {
> > -       0x00, 0x13, 0xc6, 0x00, 0x00, 0x00
> > -};
> > -
> > -void ks8695_getmac(void)
> > +static int ks8695_set_mac_address(struct eth_device *dev)
> >  {
> > -       unsigned char *fp;
> > -       int i;
> > -
> > -       /* Check if flash MAC is valid */
> > -       fp = (unsigned char *) 0x0201c000;
> > -       for (i = 0; (i < 6); i++) {
> > -               if ((fp[i] != 0) && (fp[i] != 0xff))
> > -                       break;
> > -       }
> > -
> > -       /* If we found a valid looking MAC address then use it */
> > -       if (i < 6)
> > -               memcpy(&eth_mac[0], fp, 6);
> > +       /* Set MAC address */
> > +       ks8695_write(KS8695_LAN_MAC_LOW, (dev->enetaddr[5] |
> > (dev->enetaddr[4] << 8) |
> > +               (dev->enetaddr[3] << 16) | (dev->enetaddr[2] <<
> > 24)));
> > +       ks8695_write(KS8695_LAN_MAC_HIGH, (dev->enetaddr[1] |
> > (dev->enetaddr[0] << 8)));
> > +       return 0;
> >  }
> >
> >  /****************************************************************************/
> > @@ -109,12 +92,8 @@ static int ks8695_eth_init(struct eth_device
> > *dev, bd_t *bd) ks8695_write(KS8695_LAN_DMA_TX, 0x80000000);
> >         ks8695_write(KS8695_LAN_DMA_RX, 0x80000000);
> >
> > -       ks8695_getmac();
> > -
> >         /* Set MAC address */
> > -       ks8695_write(KS8695_LAN_MAC_LOW, (eth_mac[5] | (eth_mac[4]
> > << 8) |
> > -               (eth_mac[3] << 16) | (eth_mac[2] << 24)));
> > -       ks8695_write(KS8695_LAN_MAC_HIGH, (eth_mac[1] | (eth_mac[0]
> > << 8)));
> > +       ks8695_set_mac_address(dev);
> 
> Why do you set the MAC address here?  It should be set for you by the
> network infrastructure without this call.

Simply because I was not aware of this at the time. Before the changes
here the generic infrastructure could not do it, as write_hwaddr was
unimplemented, and I was just trying to preserve function. The main
reason I started poking at the network driver was that it loaded the
MAC from a hardcoded address in ROM, obviously board specific (this is
the magic number in [PATCH 11/11] arm: cm4008, cm41xx: read MAC address
from flash). It also has a bug where it stops working after one command
(i.e. can't tftp twice), which I have not tracked down as yet. 

> >         /* Turn the 4 port switch on */
> >         i = ks8695_read(KS8695_SWITCH_CTRL0);
> > @@ -150,7 +129,7 @@ static int ks8695_eth_init(struct eth_device
> > *dev, bd_t *bd) ks8695_write(KS8695_LAN_DMA_RX, 0x71);
> >         ks8695_write(KS8695_LAN_DMA_RX_START, 0x1);
> >
> > -       printf("KS8695 ETHERNET: %pM\n", eth_mac);
> > +       printf("KS8695 ETHERNET: %pM\n", dev->enetaddr);
> >         return 0;
> >  }
> >
> > @@ -234,6 +213,7 @@ int ks8695_eth_initialize(void)
> >         dev->halt = ks8695_eth_halt;
> >         dev->send = ks8695_eth_send;
> >         dev->recv = ks8695_eth_recv;
> > +       dev->write_hwaddr = ks8695_set_mac_address;
> >         strcpy(dev->name, "ks8695eth");
> >
> >         eth_register(dev);
> > --
> > 1.7.10.4
> 
> -Joe