[U-Boot] [U-boot] [Patch v2 4/6] net: keystone_net: increase PHY auto negotiate time

[Ivan Khoronzhuk]

The new Marvel PHY (88E1514) used on K2L/K2E EVM requires longer time
to auto negotiate with SoC's SGMII port.

It can take about 3 sec to up the PHY after reset, so add code to
expose sgmii auto negotiation waiting process.

Acked-by: Vitaly Andrianov <vita...@ti.com>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronz...@ti.com>
---
 drivers/net/keystone_net.c | 36 +++++++++++++++++++++++++++++++-----
 1 file changed, 31 insertions(+), 5 deletions(-)

diff --git a/drivers/net/keystone_net.c b/drivers/net/keystone_net.c
index 1186188..c8681d0 100644
--- a/drivers/net/keystone_net.c
+++ b/drivers/net/keystone_net.c
@@ -11,6 +11,7 @@
 
 #include <net.h>
 #include <phy.h>
+#include <errno.h>
 #include <miiphy.h>
 #include <malloc.h>
 #include <asm/ti-common/keystone_nav.h>
@@ -30,6 +31,7 @@ static unsigned int sys_has_mdio = 1;
 #define RX_BUFF_NUMS   24
 #define RX_BUFF_LEN    1520
 #define MAX_SIZE_STREAM_BUFFER RX_BUFF_LEN
+#define SGMII_ANEG_TIMEOUT             4000
 
 static u8 rx_buffs[RX_BUFF_NUMS * RX_BUFF_LEN] __aligned(16);
 
@@ -169,7 +171,7 @@ int keystone_sgmii_link_status(int port)
               (status & SGMII_REG_STATUS_LINK);
 }
 
-int keystone_sgmii_config(int port, int interface)
+int keystone_sgmii_config(struct phy_device *phy_dev, int port, int interface)
 {
        unsigned int i, status, mask;
        unsigned int mr_adv_ability, control;
@@ -230,11 +232,35 @@ int keystone_sgmii_config(int port, int interface)
        if (control & SGMII_REG_CONTROL_AUTONEG)
                mask |= SGMII_REG_STATUS_AUTONEG;
 
-       for (i = 0; i < 1000; i++) {
+       status = __raw_readl(SGMII_STATUS_REG(port));
+       if ((status & mask) == mask)
+               return 0;
+
+       printf("\n%s Waiting for SGMII auto negotiation to complete",
+              phy_dev->dev->name);
+       while ((status & mask) != mask) {
+               /*
+                * Timeout reached ?
+                */
+               if (i > SGMII_ANEG_TIMEOUT) {
+                       puts(" TIMEOUT !\n");
+                       phy_dev->link = 0;
+                       return 0;
+               }
+
+               if (ctrlc()) {
+                       puts("user interrupt!\n");
+                       phy_dev->link = 0;
+                       return -EINTR;
+               }
+
+               if ((i++ % 500) == 0)
+                       printf(".");
+
+               udelay(1000);   /* 1 ms */
                status = __raw_readl(SGMII_STATUS_REG(port));
-               if ((status & mask) == mask)
-                       break;
        }
+       puts(" done\n");
 
        return 0;
 }
@@ -374,7 +400,7 @@ static int keystone2_eth_open(struct eth_device *dev, bd_t 
*bis)
 
        keystone2_net_serdes_setup();
 
-       keystone_sgmii_config(eth_priv->slave_port - 1,
+       keystone_sgmii_config(phy_dev, eth_priv->slave_port - 1,
                              eth_priv->sgmii_link_type);
 
        udelay(10000);
-- 
1.8.3.2

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