[U-Boot] [PATCH v2 6/9] AVR32: macb - Search for PHY id

Gunnar Rangoy
2009-01-23T11:56:31Z

This patch adds support for searching through available PHY-addresses in
the macb-driver. This is needed for the ATEVK1100 evaluation board,
where the PHY-address will be initialized to either 1 or 7.

This patch adds a config option, CONFIG_MACB_SEARCH_PHY, which when
enabled tells the driver to search for the PHY address.

Signed-off-by: Gunnar Rangoy <gunnar@rangoy.com>
Signed-off-by: Paul Driveklepp <pauldriveklepp@gmail.com>
Signed-off-by: Olav Morken <olavmrk@gmail.com>
---
drivers/net/macb.c | 31 +++++++++++++++++++++++++++++++
1 files changed, 31 insertions(+), 0 deletions(-)

diff --git a/drivers/net/macb.c b/drivers/net/macb.c
index d47a052..c8beb82 100644
--- a/drivers/net/macb.c
+++ b/drivers/net/macb.c
@@ -327,6 +327,30 @@ static void macb_phy_reset(struct macb_device *macb)
netdev->name, status);
}

+#ifdef CONFIG_MACB_SEARCH_PHY
+static int macb_phy_find(struct macb_device *macb)
+{
+ int i;
+ u16 phy_id;
+
+ /* Search for PHY... */
+ for (i = 0; i < 32; i++) {
+ macb->phy_addr = i;
+ phy_id = macb_mdio_read(macb, MII_PHYSID1);
+ if (phy_id != 0xffff) {
+ printf("%s: PHY present at %d\n", macb->netdev.name, i);
+ return 1;
+ }
+ }
+
+ /* PHY isn't up to snuff */
+ printf("%s: PHY not found", macb->netdev.name);
+
+ return 0;
+}
+#endif /* CONFIG_MACB_SEARCH_PHY */
+
+
static int macb_phy_init(struct macb_device *macb)
{
struct eth_device *netdev = &macb->netdev;
@@ -335,6 +359,13 @@ static int macb_phy_init(struct macb_device *macb)
int media, speed, duplex;
int i;

+#ifdef CONFIG_MACB_SEARCH_PHY
+ /* Auto-detect phy_addr */
+ if (!macb_phy_find(macb)) {
+ return 0;
+ }
+#endif /* CONFIG_MACB_SEARCH_PHY */
+
/* Check if the PHY is up to snuff... */
phy_id = macb_mdio_read(macb, MII_PHYSID1);
if (phy_id == 0xffff) {
--
1.6.0.4