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SubjectRe: [PATCH] b44: power down PHY when interface down
Date
On Sunday 01 July 2007 14:49:23 Török Edvin wrote:
> On 6/30/07, Stephen Hemminger <shemminger@linux-foundation.org> wrote:
> >
> > This is a non-standard formatting for comments, please follow
> > Coding style:
>
> Thanks, I have updated the patch.
>
> When the interface is down (or driver removed), the BroadCom 44xx card
> remains powered on,
> and both its MAC and PHY is using up power.
> This patch makes the driver issue a MAC_CTRL_PHY_PDOWN when the
> interface is halted.
> Also doing a partial chip reset turns off the activity LEDs too.
>
> Signed-off-by: Torok Edwin <edwintorok@gmail.com>
> ---
> b44.c | 28 +++++++++++++++++++++++-----
> 1 file changed, 23 insertions(+), 5 deletions(-)
> diff --git a/drivers/net/b44.c b/drivers/net/b44.c
> index 879a2ff..43926fd 100644
> --- a/drivers/net/b44.c
> +++ b/drivers/net/b44.c
> @@ -113,6 +113,8 @@ static void b44_init_rings(struct b44 *);
> #define B44_FULL_RESET 1
> #define B44_FULL_RESET_SKIP_PHY 2
> #define B44_PARTIAL_RESET 3
> +#define B44_CHIP_RESET_FULL 4
> +#define B44_CHIP_RESET_PARTIAL 5
>
> static void b44_init_hw(struct b44 *, int);
>
> @@ -1283,7 +1285,7 @@ static void b44_clear_stats(struct b44 *bp)
> }
>
> /* bp->lock is held. */
> -static void b44_chip_reset(struct b44 *bp)
> +static void b44_chip_reset(struct b44 *bp, int reset_kind)
> {
> if (ssb_is_core_up(bp)) {
> bw32(bp, B44_RCV_LAZY, 0);
> @@ -1307,6 +1309,13 @@ static void b44_chip_reset(struct b44 *bp)
>
> b44_clear_stats(bp);
>
> + /*
> + * Don't enable PHY if we are doing a partial reset
> + * we are probably going to power down
> + */
> + if (reset_kind == B44_CHIP_RESET_PARTIAL)
> + return;
> +
> /* Make PHY accessible. */
> bw32(bp, B44_MDIO_CTRL, (MDIO_CTRL_PREAMBLE |
> (0x0d & MDIO_CTRL_MAXF_MASK)));
> @@ -1332,7 +1341,14 @@ static void b44_chip_reset(struct b44 *bp)
> static void b44_halt(struct b44 *bp)
> {
> b44_disable_ints(bp);
> - b44_chip_reset(bp);
> + /* reset PHY */
> + b44_phy_reset(bp);
> + /* power down PHY */
> + printk(KERN_INFO PFX "%s: powering down PHY\n", bp->dev->name);
> + bw32(bp, B44_MAC_CTRL, MAC_CTRL_PHY_PDOWN);
> + /* now reset the chip, but without enabling the MAC&PHY
> + * part of it. This has to be done _after_ we shut down the PHY */
> + b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
> }
>
> /* bp->lock is held. */
> @@ -1376,7 +1392,7 @@ static void b44_init_hw(struct b44 *bp, int reset_kind)
> {
> u32 val;
>
> - b44_chip_reset(bp);
> + b44_chip_reset(bp, B44_CHIP_RESET_FULL);
> if (reset_kind == B44_FULL_RESET) {
> b44_phy_reset(bp);
> b44_setup_phy(bp);
> @@ -1430,7 +1446,7 @@ static int b44_open(struct net_device *dev)
>
> err = request_irq(dev->irq, b44_interrupt, IRQF_SHARED, dev->name, dev);
> if (unlikely(err < 0)) {
> - b44_chip_reset(bp);
> + b44_chip_reset(bp, B44_CHIP_RESET_PARTIAL);
> b44_free_rings(bp);
> b44_free_consistent(bp);
> goto out;
> @@ -2250,7 +2266,7 @@ static int __devinit b44_init_one(struct pci_dev *pdev,
> /* Chip reset provides power to the b44 MAC & PCI cores, which
> * is necessary for MAC register access.
> */
> - b44_chip_reset(bp);
> + b44_chip_reset(bp, B44_CHIP_RESET_FULL);
>
> printk(KERN_INFO "%s: Broadcom 4400 10/100BaseT Ethernet ", dev->name);
> for (i = 0; i < 6; i++)
> @@ -2284,6 +2300,7 @@ static void __devexit b44_remove_one(struct pci_dev *pdev)
> free_netdev(dev);
> pci_release_regions(pdev);
> pci_disable_device(pdev);
> + pci_set_power_state(pdev, PCI_D3hot);
> pci_set_drvdata(pdev, NULL);
> }
>
> @@ -2312,6 +2329,7 @@ static int b44_suspend(struct pci_dev *pdev,
> pm_message_t state)

You patch is also damaged here.
Check your MUA settings.

--
Greetings Michael.
-
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