Hello all,
This patch adds a field to struct ocp_func_emac_data that allows
platform-specific unsupported PHY features to be passed in to the
ibm_emac ethernet driver.
This patch also adds some logic for the Bamboo eval board to populate
this field based on the dip switches on the board. This is a workaround
for the improperly biased RJ-45 sockets on the Rev. 0 Bamboo. See the
comments in bamboo.c for more information on this bug.
-Wade Farnsworth
Signed-off by: Wade Farnsworth <wfarnsworth at mvista.com>
-------------- next part --------------
--- linux-2.6/arch/ppc/platforms/4xx/bamboo.c 2005-08-03 13:33:41.000000000
-0700
+++ linux-2.6-dev/arch/ppc/platforms/4xx/bamboo.c 2005-08-02
10:51:00.000000000 -0700
@@ -123,33 +123,69 @@ bamboo_map_irq(struct pci_dev *dev, unsi
static void __init bamboo_set_emacdata(void)
{
- unsigned char * selection1_base;
+ u8 * base_addr;
struct ocp_def *def;
struct ocp_func_emac_data *emacdata;
- u8 selection1_val;
+ u8 val;
int mode;
+ u32 unsupported = 0;
- selection1_base = ioremap64(BAMBOO_FPGA_SELECTION1_REG_ADDR, 16);
- selection1_val = readb(selection1_base);
- iounmap((void *) selection1_base);
- if (BAMBOO_SEL_MII(selection1_val))
+ base_addr = ioremap64(BAMBOO_FPGA_SELECTION1_REG_ADDR, 16);
+ val = readb(base_addr);
+ iounmap((void *) base_addr);
+ if (BAMBOO_SEL_MII(val))
mode = PHY_MODE_MII;
- else if (BAMBOO_SEL_RMII(selection1_val))
+ else if (BAMBOO_SEL_RMII(val))
mode = PHY_MODE_RMII;
else
mode = PHY_MODE_SMII;
- /* Set mac_addr and phy mode for each EMAC */
+ /*
+ * SW2 on the Bamboo is used for ethernet configuration and is accessed
+ * via the CONFIG2 register in the FPGA. If the ANEG pin is set,
+ * overwrite the supported features with the settings in SW2.
+ *
+ * This is used as a workaround for the improperly biased RJ-45 sockets
+ * on the Rev. 0 Bamboo. By default only 10baseT is functional.
+ * Removing inductors L17 and L18 from the board allows 100baseT, but
+ * disables 10baseT. The Rev. 1 has no such limitations.
+ */
+
+ base_addr = ioremap64(BAMBOO_FPGA_CONFIG2_REG_ADDR, 8);
+ val = readb(base_addr);
+ iounmap((void *) base_addr);
+ if (!BAMBOO_AUTONEGOTIATE(val)) {
+ unsupported |= SUPPORTED_Autoneg;
+ if (BAMBOO_FORCE_100Mbps(val)) {
+ unsupported |= SUPPORTED_10baseT_Full;
+ unsupported |= SUPPORTED_10baseT_Half;
+ if (BAMBOO_FULL_DUPLEX_EN(val))
+ unsupported |= SUPPORTED_100baseT_Half;
+ else
+ unsupported |= SUPPORTED_100baseT_Full;
+ } else {
+ unsupported |= SUPPORTED_100baseT_Full;
+ unsupported |= SUPPORTED_100baseT_Half;
+ if (BAMBOO_FULL_DUPLEX_EN(val))
+ unsupported |= SUPPORTED_10baseT_Half;
+ else
+ unsupported |= SUPPORTED_10baseT_Full;
+ }
+ }
+
+ /* Set mac_addr, phy mode and unsupported phy features for each EMAC */
def = ocp_get_one_device(OCP_VENDOR_IBM, OCP_FUNC_EMAC, 0);
emacdata = def->additions;
memcpy(emacdata->mac_addr, __res.bi_enetaddr, 6);
emacdata->phy_mode = mode;
+ emacdata->feat_unsupp = unsupported;
def = ocp_get_one_device(OCP_VENDOR_IBM, OCP_FUNC_EMAC, 1);
emacdata = def->additions;
memcpy(emacdata->mac_addr, __res.bi_enet1addr, 6);
emacdata->phy_mode = mode;
+ emacdata->feat_unsupp = unsupported;
}
static int
--- linux-2.6/include/asm-ppc/ibm_ocp.h 2005-08-03 13:34:08.000000000 -0700
+++ linux-2.6-dev/include/asm-ppc/ibm_ocp.h 2005-08-02 10:49:42.000000000
-0700
@@ -67,6 +67,7 @@ struct ocp_func_emac_data {
int phy_mode; /* PHY type or configurable mode */
u8 mac_addr[6]; /* EMAC mac address */
u32 phy_map; /* EMAC phy map */
+ u32 feat_unsupp; /* Unsupported phy features */
};
/* Sysfs support */
