hello everybody
I am still struggling with my FADS, and the 2.4.4-07.23 kernel from
Denx...
I am trying to have the FEC working, but I hqve problems..
when I compile without "MDIO for PHY configuration"
the kernel prints forever the message "fec.c[1374] mii_link_interrupt:
unexpected Link interrupt
on the console at boottime.
when I compile with it, the kernel Oopses.
after carefull debugging, I tracked it down to the line 1367 in
arch/ppc/8xx_io/
mii_do_cmd(dev, fep->phy->ack_int);
it is a kernel access of bad area.
It is possible that I have missed something in the configuration, but I
really can't guess what...
If anybody could help...
Thanks.
Jeremy
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
when I compile without "MDIO for PHY configuration"
the kernel prints forever the message "fec.c[1374] mii_link_interrupt:
unexpected Link interrupt
on the console at boottime.
when I compile with it, the kernel Oopses.
after carefull debugging, I tracked it down to the line 1367 in
arch/ppc/8xx_io/
mii_do_cmd(dev, fep->phy->ack_int);
it is a kernel access of bad area.
There is a problem in the FEC driver. The MII link interrupt gets
enabled too soon, before the PHY interface chip is configured. I believe
that the problem has been fixed in the linuxppc_2_4_devel tree. It was
supposed to be fixed much sooner, but the patch got lost somewhere
between the developpers and the development tree.
The problem should not occur if a full duplex ethernet link is connected
to the board at boot time.
Laurent Pinchart
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
Dear Reader!
I was solved this problem...
The season is relate with interrupt.
The fec.c enable the interrupt so fast!
And, the LINK interrupt of some PHYs use with the Duplex Indicator.
So, we must clear the interrupt and must set the interrupt mode,
before install the PHY Link interrupt!
Please refer my source code(comment with YHKIM) of fec_enet_init().
===== fec_enet_init ======
#ifdef CONFIG_RPXCLASSIC
/* Make Port C, bit 15 an input that causes interrupts.
*/
immap->im_ioport.iop_pcpar &= ~0x0001;
immap->im_ioport.iop_pcdir &= ~0x0001;
immap->im_ioport.iop_pcso &= ~0x0001;
immap->im_ioport.iop_pcint |= 0x0001;
cpm_install_handler(CPMVEC_PIO_PC15, mii_link_interrupt, dev);
/* Make LEDS reflect Link status.
*/
*((uint *) RPX_CSR_ADDR) &= ~BCSR2_FETHLEDMODE;
#endif
/* YHKIM */
#ifndef CONFIG_DASAN_COMMON
#ifdef PHY_INTERRUPT
if (request_8xxirq(PHY_INTERRUPT, mii_link_interrupt, 0, "mii", dev) != 0)
panic("Could not allocate MII IRQ!");
((immap_t *)IMAP_ADDR)->im_siu_conf.sc_siel |=
(0x80000000 >> PHY_INTERRUPT);
#endif
#endif /* CONFIG_DASAN_COMMON */
dev->base_addr = (unsigned long)fecp;
dev->priv = fep;
/* The FEC Ethernet specific entries in the device structure. */
dev->open = fec_enet_open;
dev->hard_start_xmit = fec_enet_start_xmit;
dev->tx_timeout = fec_timeout;
dev->watchdog_timeo = TX_TIMEOUT;
dev->stop = fec_enet_close;
dev->get_stats = fec_enet_get_stats;
dev->set_multicast_list = set_multicast_list;
#ifdef CONFIG_USE_MDIO
for (i=0; i<NMII-1; i++)
mii_cmds[i].mii_next = &mii_cmds[i+1];
mii_free = mii_cmds;
#endif /* CONFIG_USE_MDIO */
/* Configure all of port D for MII.
*/
immap->im_ioport.iop_pdpar = 0x1fff;
/* Bits moved from Rev. D onward.
*/
if ((mfspr(IMMR) & 0xffff) < 0x0501)
immap->im_ioport.iop_pddir = 0x1c58; /* Pre rev. D */
else
immap->im_ioport.iop_pddir = 0x1fff; /* Rev. D and later */
#ifdef CONFIG_USE_MDIO
/* Set MII speed to 2.5 MHz
*/
fecp->fec_mii_speed = fep->phy_speed =
(( (bd->bi_intfreq + 500000) / 2500000 / 2 ) & 0x3F ) << 1;
#else
fecp->fec_mii_speed = 0; /* turn off MDIO */
#endif /* CONFIG_USE_MDIO */
printk ("%s: FEC ENET Version 0.2, FEC irq %d"
#ifdef PHY_INTERRUPT
", MII irq %d"
#endif
", addr ",
dev->name, FEC_INTERRUPT
#ifdef PHY_INTERRUPT
, PHY_INTERRUPT
#endif
);
for (i=0; i<6; i++)
printk("%02x%c", dev->dev_addr[i], (i==5) ? '\n' : ':');
#ifdef CONFIG_USE_MDIO /* start in full duplex mode, and negotiate speed */
fec_restart (dev, 1);
#else /* always use half duplex mode only */
fec_restart (dev, 0);
#endif
#ifdef CONFIG_USE_MDIO
/* Queue up command to detect the PHY and initialize the
* remainder of the interface.
*/
fep->phy_id_done = 0;
fep->phy_addr = 0;
mii_queue(dev, mk_mii_read(MII_REG_PHYIR1), mii_discover_phy);
#endif /* CONFIG_USE_MDIO */
/* YHKIM */
#ifdef CONFIG_DASAN_COMMON
#ifdef PHY_INTERRUPT
while(fep->phy == 0)
udelay(5);
mii_do_cmd(dev, fep->phy->ack_int);
mii_do_cmd(dev, fep->phy->startup);
{
int tmp_i;
for(tmp_i=0 ; tmp_i<50; tmp_i++)
udelay(5);
}
if (request_8xxirq(PHY_INTERRUPT, mii_link_interrupt, 0, "mii", dev) != 0)
panic("Could not allocate MII IRQ!");
printk("install fec link interrupt\n");
((immap_t *)IMAP_ADDR)->im_siu_conf.sc_siel |=
(0x80000000 >> PHY_INTERRUPT);
#endif /* PHY_INTERRUPT */
#endif /* CONFIG_DASAN_COMMON */
return 0;
}
====================
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-----------------------------------------------------------
----- Original Message -----
From: "Laurent Pinchart" <redacted>
To: <redacted>
Sent: Monday, October 22, 2001 8:46 PM
Subject: Re: Problem using FEC on a860T
quoted
when I compile without "MDIO for PHY configuration"
the kernel prints forever the message "fec.c[1374] mii_link_interrupt:
unexpected Link interrupt
on the console at boottime.
when I compile with it, the kernel Oopses.
after carefull debugging, I tracked it down to the line 1367 in
arch/ppc/8xx_io/
mii_do_cmd(dev, fep->phy->ack_int);
it is a kernel access of bad area.
There is a problem in the FEC driver. The MII link interrupt gets
enabled too soon, before the PHY interface chip is configured. I believe
that the problem has been fixed in the linuxppc_2_4_devel tree. It was
supposed to be fixed much sooner, but the patch got lost somewhere
between the developpers and the development tree.
The problem should not occur if a full duplex ethernet link is connected
to the board at boot time.
Laurent Pinchart
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/