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Date:	Sat, 28 Apr 2007 11:23:42 -0400
From:	Jeff Garzik <jgarzik@...ox.com>
To:	Olof Johansson <olof@...om.net>
CC:	netdev@...r.kernel.org
Subject: Re: [RESEND] [PATCH v2] [4/5] pasemi_mac: phy support

Olof Johansson wrote:
> PHY support for pasemi_mac. Also add msg_enable flags for future
> disablement of the link messages.
> 
> Signed-off-by: Olof Johansson <olof@...om.net>
> 
> 
> Index: powerpc/drivers/net/pasemi_mac.c
> ===================================================================
> --- powerpc.orig/drivers/net/pasemi_mac.c
> +++ powerpc/drivers/net/pasemi_mac.c
> @@ -594,6 +592,110 @@ static irqreturn_t pasemi_mac_tx_intr(in
>  	return IRQ_HANDLED;
>  }
>  
> +static void pasemi_adjust_link(struct net_device *dev)
> +{
> +	struct pasemi_mac *mac = netdev_priv(dev);
> +	int msg;
> +	unsigned int flags;
> +	unsigned int new_flags;
> +
> +	if (!mac->phydev->link) {
> +		/* If no link, MAC speed settings don't matter. Just report
> +		 * link down and return.
> +		 */
> +		if (mac->link && netif_msg_link(mac))
> +			printk(KERN_INFO "%s: Link is down.\n", dev->name);
> +
> +		netif_carrier_off(dev);
> +		mac->link = 0;
> +
> +		return;
> +	} else
> +		netif_carrier_on(dev);
> +
> +	pci_read_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, &flags);
> +	new_flags = flags & ~(PAS_MAC_CFG_PCFG_HD | PAS_MAC_CFG_PCFG_SPD_M);
> +
> +	if (!mac->phydev->duplex)
> +		new_flags |= PAS_MAC_CFG_PCFG_HD;
> +
> +	switch (mac->phydev->speed) {
> +	case 1000:
> +		new_flags |= PAS_MAC_CFG_PCFG_SPD_1G;
> +		break;
> +	case 100:
> +		new_flags |= PAS_MAC_CFG_PCFG_SPD_100M;
> +		break;
> +	case 10:
> +		new_flags |= PAS_MAC_CFG_PCFG_SPD_10M;
> +		break;
> +	default:
> +		printk("Unsupported speed %d\n", mac->phydev->speed);
> +	}
> +
> +	/* Print on link or speed/duplex change */
> +	msg = mac->link != mac->phydev->link || flags != new_flags;
> +
> +	mac->duplex = mac->phydev->duplex;
> +	mac->speed = mac->phydev->speed;
> +	mac->link = mac->phydev->link;
> +
> +	if (new_flags != flags)
> +		pci_write_config_dword(mac->pdev, PAS_MAC_CFG_PCFG, new_flags);
> +
> +	if (msg && netif_msg_link(mac))
> +		printk(KERN_INFO "%s: Link is up at %d Mbps, %s duplex.\n",
> +		       dev->name, mac->speed, mac->duplex ? "full" : "half");
> +}
> +
> +static int pasemi_mac_phy_init(struct net_device *dev)
> +{
> +	struct pasemi_mac *mac = netdev_priv(dev);
> +	struct device_node *dn, *phy_dn;
> +	struct phy_device *phydev;
> +	unsigned int phy_id;
> +	const phandle *ph;
> +	const unsigned int *prop;
> +	struct resource r;
> +	int ret;
> +
> +	dn = pci_device_to_OF_node(mac->pdev);
> +	ph = get_property(dn, "phy-handle", NULL);
> +	if (!ph)
> +		return -ENODEV;
> +	phy_dn = of_find_node_by_phandle(*ph);
> +
> +	prop = get_property(phy_dn, "reg", NULL);
> +	ret = of_address_to_resource(phy_dn->parent, 0, &r);
> +	if (ret)
> +		goto err;
> +
> +	phy_id = *prop;
> +	snprintf(mac->phy_id, BUS_ID_SIZE, PHY_ID_FMT, (int)r.start, phy_id);
> +
> +	of_node_put(phy_dn);
> +
> +	mac->link = 0;
> +	mac->speed = 0;
> +	mac->duplex = -1;
> +
> +	phydev = phy_connect(dev, mac->phy_id, &pasemi_adjust_link, 0, PHY_INTERFACE_MODE_SGMII);
> +
> +	if (IS_ERR(phydev)) {
> +		printk(KERN_ERR "%s: Could not attach to phy\n", dev->name);
> +		return PTR_ERR(phydev);
> +	}
> +
> +	mac->phydev = phydev;
> +
> +	return 0;
> +
> +err:
> +	of_node_put(phy_dn);
> +	return -ENODEV;
> +}
> +
> +
>  static int pasemi_mac_open(struct net_device *dev)
>  {
>  	struct pasemi_mac *mac = netdev_priv(dev);
> @@ -667,6 +769,13 @@ static int pasemi_mac_open(struct net_de
>  
>  	pasemi_mac_replenish_rx_ring(dev);
>  
> +	ret = pasemi_mac_phy_init(dev);
> +	/* Some configs don't have PHYs (XAUI etc), so don't complain about
> +	 * failed init due to -ENODEV.
> +	 */
> +	if (ret && ret != -ENODEV)
> +		dev_warn(&mac->pdev->dev, "phy init failed: %d\n", ret);
> +
>  	netif_start_queue(dev);
>  	netif_poll_enable(dev);
>  
> @@ -697,6 +806,9 @@ static int pasemi_mac_open(struct net_de
>  		goto out_rx_int;
>  	}
>  
> +	if (mac->phydev)
> +		phy_start(mac->phydev);
> +
>  	return 0;
>  
>  out_rx_int:
> @@ -720,6 +832,11 @@ static int pasemi_mac_close(struct net_d
>  	unsigned int stat;
>  	int retries;
>  
> +	if (mac->phydev) {
> +		phy_stop(mac->phydev);
> +		phy_disconnect(mac->phydev);
> +	}
> +
>  	netif_stop_queue(dev);
>  
>  	/* Clean out any pending buffers */
> @@ -1013,6 +1130,9 @@ pasemi_mac_probe(struct pci_dev *pdev, c
>  	mac->rx_status = &dma_status->rx_sta[mac->dma_rxch];
>  	mac->tx_status = &dma_status->tx_sta[mac->dma_txch];
>  
> +	/* Enable most messages by default */
> +	mac->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;

msg_enable should be initialized in a standard fashion, from your debug 
module parameter.  grep for 'msg_enable' in other drivers.

	Jeff



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