linux-kernel - Re: [PATCH 4/6] IP100A Change search phy addr start form 0

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Message-ID: <008e01c6c4e4$4fd05a00$4964a8c0@icplus.com.tw>
Date:	Mon, 21 Aug 2006 13:40:29 +0800
From:	"Jesse Huang" <jesse@...lus.com.tw>
To:	"Jeff Garzik" <jgarzik@...ox.com>
Cc:	<linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
	<akpm@...l.org>
Subject: Re: [PATCH 4/6] IP100A Change search phy addr start form 0

Hi Jeff:

In IP100A, phy address is 0. Because IP100A is a single chip, the in
chip phy address is 0. so, we must search phy address for 0.

Jesse
----- Original Message ----- 
From: "Jeff Garzik" <jgarzik@...ox.com>
To: "Jesse Huang" <jesse@...lus.com.tw>
Cc: <linux-kernel@...r.kernel.org>; <netdev@...r.kernel.org>;
<akpm@...l.org>
Sent: Friday, August 18, 2006 7:20 PM
Subject: Re: [PATCH 4/6] IP100A Change search phy addr start form 0


Jesse Huang wrote:
> From: Jesse Huang <jesse@...lus.com.tw>
>
> Change search phy addr start form 0
>
> Change Logs:
>     Change search phy addr start form 0
>
> ---
>
>  drivers/net/sundance.c |    5 +++--
>  1 files changed, 3 insertions(+), 2 deletions(-)
>
> 212cd4ffa21a57300eae4254bf02e5b33b96f544
> diff --git a/drivers/net/sundance.c b/drivers/net/sundance.c
> index 2bde1b3..f63871a 100755
> --- a/drivers/net/sundance.c
> +++ b/drivers/net/sundance.c
> @@ -21,7 +21,7 @@
>  */
>
>  #define DRV_NAME "sundance"
> -#define DRV_VERSION "1.01+LK1.13"
> +#define DRV_VERSION "1.01+LK1.14"
>  #define DRV_RELDATE "04-Aug-2006"
>
>
> @@ -559,8 +559,9 @@ #endif
>  /*
>  * It seems some phys doesn't deal well with address 0 being accessed
>  * first, so leave address zero to the end of the loop (32 & 31).
> + * for IP100A the phy should start from 0
>  */
> - for (phy = 1; phy <= 32 && phy_idx < MII_CNT; phy++) {
> + for (phy = 0; phy <= 32 && phy_idx < MII_CNT; phy++) {
>  int phyx = phy & 0x1f;
>  int mii_status = mdio_read(dev, phyx, MII_BMSR);
>  if (mii_status != 0xffff  &&  mii_status != 0x0000) {

For IP100A, is the phy built into the chip?

For a standard DP83840[A] phy, phy #0 is a "ghost" which mirrors another
phy.  For this reason, we scan phy #0 last.

Does the above code not work?

Jeff


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