netdev - Re: [PATCH] [NET] phy/broadcom: add support for BCM5481 PHY

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Message-ID: <47A99DA0.3040505@pobox.com>
Date:	Wed, 06 Feb 2008 06:44:32 -0500
From:	Jeff Garzik <jgarzik@...ox.com>
To:	Anton Vorontsov <avorontsov@...mvista.com>
CC:	"Maciej W. Rozycki" <macro@...ux-mips.org>,
	Andy Fleming <afleming@...escale.com>, netdev@...r.kernel.org
Subject: Re: [PATCH] [NET] phy/broadcom: add support for BCM5481 PHY

Anton Vorontsov wrote:
> This patch adds support for BCM5481 PHY. Unfortunately it's hard to
> get specifications for this PHY, so its special register 0x18 isn't
> annotated properly (but we know it's used to set up the delays).
> 
> I've kept the magic numbers, so we'll not forget to fix it at the
> first opportunity, and will name that register and its bits correctly.
> 
> Signed-off-by: Anton Vorontsov <avorontsov@...mvista.com>
> ---
>  drivers/net/phy/broadcom.c |   54 ++++++++++++++++++++++++++++++++++++++++++++
>  1 files changed, 54 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/net/phy/broadcom.c b/drivers/net/phy/broadcom.c
> index 29666c8..d15280e 100644
> --- a/drivers/net/phy/broadcom.c
> +++ b/drivers/net/phy/broadcom.c
> @@ -99,6 +99,41 @@ static int bcm54xx_config_intr(struct phy_device *phydev)
>  	return err;
>  }
>  
> +static int bcm5481_config_aneg(struct phy_device *phydev)
> +{
> +	int ret;
> +
> +	/* Aneg firsly. */
> +	ret = genphy_config_aneg(phydev);
> +
> +	/* Then we can set up the delay. */
> +	if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) {
> +		u16 reg;
> +
> +		/*
> +		 * There is no BCM5481 specification available, so down
> +		 * here is everything we know about "register 0x18". This
> +		 * at least helps BCM5481 to successfuly receive packets
> +		 * on MPC8360E-RDK board. Peter Barada <peterb@...icpd.com>
> +		 * says: "This sets delay between the RXD and RXC signals
> +		 * instead of using trace lengths to achieve timing".
> +		 */
> +
> +		/* Set RDX clk delay. */
> +		reg = 0x7 | (0x7 << 12);
> +		phy_write(phydev, 0x18, reg);
> +
> +		reg = phy_read(phydev, 0x18);
> +		/* Set RDX-RXC skew. */
> +		reg |= (1 << 8);
> +		/* Write bits 14:0. */
> +		reg |= (1 << 15);
> +		phy_write(phydev, 0x18, reg);
> +	}
> +
> +	return ret;
> +}
> +
>  static struct phy_driver bcm5411_driver = {
>  	.phy_id		= 0x00206070,
>  	.phy_id_mask	= 0xfffffff0,
> @@ -141,6 +176,20 @@ static struct phy_driver bcm5461_driver = {
>  	.driver 	= { .owner = THIS_MODULE },
>  };
>  
> +static struct phy_driver bcm5481_driver = {
> +	.phy_id		= 0x0143bca0,
> +	.phy_id_mask	= 0xfffffff0,
> +	.name		= "Broadcom BCM5481",
> +	.features	= PHY_GBIT_FEATURES,
> +	.flags		= PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
> +	.config_init	= bcm54xx_config_init,
> +	.config_aneg	= bcm5481_config_aneg,
> +	.read_status	= genphy_read_status,
> +	.ack_interrupt	= bcm54xx_ack_interrupt,
> +	.config_intr	= bcm54xx_config_intr,
> +	.driver 	= { .owner = THIS_MODULE },
> +};
> +
>  static int __init broadcom_init(void)
>  {
>  	int ret;
> @@ -154,8 +203,13 @@ static int __init broadcom_init(void)
>  	ret = phy_driver_register(&bcm5461_driver);
>  	if (ret)
>  		goto out_5461;
> +	ret = phy_driver_register(&bcm5481_driver);
> +	if (ret)
> +		goto out_5481;
>  	return ret;

applied



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