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authorTimur Tabi <timur@freescale.com>2011-10-18 18:44:34 -0500
committerKumar Gala <galak@kernel.crashing.org>2011-10-20 16:01:37 -0500
commita836626cc4ddae53bfa46195a39194f21ad157af (patch)
tree9fbd99ccbe888bbcaf557d354a31da9ba9d9be25
parent3b001ad26d6e03ebe2510ec8506a8425392adcf8 (diff)
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powerpc/85xx: wait for alignment before resetting SERDES RX lanes (SERDES9)
The work-around for P4080 erratum SERDES9 says that the SERDES receiver lanes should be reset after the XAUI starts tranmitting alignment signals. Signed-off-by: Timur Tabi <timur@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
-rw-r--r--arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c10
-rw-r--r--board/freescale/corenet_ds/eth_p4080.c38
-rw-r--r--drivers/net/phy/teranetics.c2
-rw-r--r--include/phy.h4
4 files changed, 35 insertions, 19 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c b/arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c
index 07e58ed..89ed5b4 100644
--- a/arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c
+++ b/arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c
@@ -504,9 +504,6 @@ void fsl_serdes_init(void)
const char *srds_lpd_arg;
size_t arglen;
#endif
-#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES9
- enum srds_prtcl device;
-#endif
#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES_A001
int need_serdes_a001; /* TRUE == need work-around for SERDES A001 */
#endif
@@ -787,11 +784,4 @@ void fsl_serdes_init(void)
SRDS_RSTCTL_SDPD);
}
#endif
-
-#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES9
- for (device = XAUI_FM1; device <= XAUI_FM2; device++) {
- if (is_serdes_configured(device))
- __serdes_reset_rx(srds_regs, cfg, device);
- }
-#endif
}
diff --git a/board/freescale/corenet_ds/eth_p4080.c b/board/freescale/corenet_ds/eth_p4080.c
index 00dfa9a..7ff00d1 100644
--- a/board/freescale/corenet_ds/eth_p4080.c
+++ b/board/freescale/corenet_ds/eth_p4080.c
@@ -93,21 +93,43 @@ struct mii_dev *mii_dev_for_muxval(u32 muxval)
return bus;
}
-#ifdef CONFIG_SYS_P4080_ERRATUM_SERDES9
+#if defined(CONFIG_SYS_P4080_ERRATUM_SERDES9) && defined(CONFIG_PHY_TERANETICS)
int board_phy_config(struct phy_device *phydev)
{
- /*
- * If this is the 10G PHY, and we switched it to fiber,
- * we need to reset the serdes link for SERDES9
- */
- if ((phydev->port == PORT_FIBRE) && (phydev->drv->uid == 0x00a19410)) {
+ if (phydev->drv->uid == PHY_UID_TN2020) {
+ unsigned long timeout = 1 * 1000; /* 1 seconds */
enum srds_prtcl device;
+ /*
+ * Wait for the XAUI to come out of reset. This is when it
+ * starts transmitting alignment signals.
+ */
+ while (--timeout) {
+ int reg = phy_read(phydev, MDIO_MMD_PHYXS, MDIO_CTRL1);
+ if (reg < 0) {
+ printf("TN2020: Error reading from PHY at "
+ "address %u\n", phydev->addr);
+ break;
+ }
+ /*
+ * Note that we've never actually seen
+ * MDIO_CTRL1_RESET set to 1.
+ */
+ if ((reg & MDIO_CTRL1_RESET) == 0)
+ break;
+ udelay(1000);
+ }
+
+ if (!timeout) {
+ printf("TN2020: Timeout waiting for PHY at address %u "
+ " to reset.\n", phydev->addr);
+ }
+
switch (phydev->addr) {
- case 4:
+ case CONFIG_SYS_FM1_10GEC1_PHY_ADDR:
device = XAUI_FM1;
break;
- case 0:
+ case CONFIG_SYS_FM2_10GEC1_PHY_ADDR:
device = XAUI_FM2;
break;
default:
diff --git a/drivers/net/phy/teranetics.c b/drivers/net/phy/teranetics.c
index 9d9397a..78447b7 100644
--- a/drivers/net/phy/teranetics.c
+++ b/drivers/net/phy/teranetics.c
@@ -95,7 +95,7 @@ int tn2020_startup(struct phy_device *phydev)
struct phy_driver tn2020_driver = {
.name = "Teranetics TN2020",
- .uid = 0x00a19410,
+ .uid = PHY_UID_TN2020,
.mask = 0xfffffff0,
.features = PHY_10G_FEATURES,
.mmds = (MDIO_DEVS_PMAPMD | MDIO_DEVS_PCS |
diff --git a/include/phy.h b/include/phy.h
index d5817bf..095f41c 100644
--- a/include/phy.h
+++ b/include/phy.h
@@ -226,4 +226,8 @@ int phy_natsemi_init(void);
int phy_realtek_init(void);
int phy_teranetics_init(void);
int phy_vitesse_init(void);
+
+/* PHY UIDs for various PHYs that are referenced in external code */
+#define PHY_UID_TN2020 0x00a19410
+
#endif