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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>
This commit is contained in:
Timur Tabi 2011-10-18 18:44:34 -05:00 committed by Kumar Gala
parent 3b001ad26d
commit a836626cc4
4 changed files with 35 additions and 19 deletions
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10
arch/powerpc/cpu/mpc85xx/fsl_corenet_serdes.c
View File

@ -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
}

38
board/freescale/corenet_ds/eth_p4080.c
View File

@ -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:

2
drivers/net/phy/teranetics.c
View File

@ -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 |

4
include/phy.h
View File

@ -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