[PATCH net-next 1/4] drivers: net: xgene-v2: Add MDIO support
Iyappan Subramanian
isubramanian at apm.com
Tue Mar 21 12:24:40 PDT 2017
Added phy management support by using phy abstraction layer APIs.
Signed-off-by: Iyappan Subramanian <isubramanian at apm.com>
---
drivers/net/ethernet/apm/xgene-v2/Makefile | 2 +-
drivers/net/ethernet/apm/xgene-v2/mac.c | 2 +-
drivers/net/ethernet/apm/xgene-v2/mac.h | 1 +
drivers/net/ethernet/apm/xgene-v2/main.c | 13 ++-
drivers/net/ethernet/apm/xgene-v2/main.h | 5 +
drivers/net/ethernet/apm/xgene-v2/mdio.c | 178 +++++++++++++++++++++++++++++
6 files changed, 196 insertions(+), 5 deletions(-)
create mode 100644 drivers/net/ethernet/apm/xgene-v2/mdio.c
diff --git a/drivers/net/ethernet/apm/xgene-v2/Makefile b/drivers/net/ethernet/apm/xgene-v2/Makefile
index 735309c..0fa5975 100644
--- a/drivers/net/ethernet/apm/xgene-v2/Makefile
+++ b/drivers/net/ethernet/apm/xgene-v2/Makefile
@@ -2,5 +2,5 @@
# Makefile for APM X-Gene Ethernet v2 driver
#
-xgene-enet-v2-objs := main.o mac.o enet.o ring.o
+xgene-enet-v2-objs := main.o mac.o enet.o ring.o mdio.o
obj-$(CONFIG_NET_XGENE_V2) += xgene-enet-v2.o
diff --git a/drivers/net/ethernet/apm/xgene-v2/mac.c b/drivers/net/ethernet/apm/xgene-v2/mac.c
index c3189de..ee431e3 100644
--- a/drivers/net/ethernet/apm/xgene-v2/mac.c
+++ b/drivers/net/ethernet/apm/xgene-v2/mac.c
@@ -27,7 +27,7 @@ void xge_mac_reset(struct xge_pdata *pdata)
xge_wr_csr(pdata, MAC_CONFIG_1, 0);
}
-static void xge_mac_set_speed(struct xge_pdata *pdata)
+void xge_mac_set_speed(struct xge_pdata *pdata)
{
u32 icm0, icm2, ecm0, mc2;
u32 intf_ctrl, rgmii;
diff --git a/drivers/net/ethernet/apm/xgene-v2/mac.h b/drivers/net/ethernet/apm/xgene-v2/mac.h
index 0fce6ae..74397c9 100644
--- a/drivers/net/ethernet/apm/xgene-v2/mac.h
+++ b/drivers/net/ethernet/apm/xgene-v2/mac.h
@@ -101,6 +101,7 @@ static inline u32 xgene_get_reg_bits(u32 var, int pos, int len)
struct xge_pdata;
void xge_mac_reset(struct xge_pdata *pdata);
+void xge_mac_set_speed(struct xge_pdata *pdata);
void xge_mac_enable(struct xge_pdata *pdata);
void xge_mac_disable(struct xge_pdata *pdata);
void xge_mac_init(struct xge_pdata *pdata);
diff --git a/drivers/net/ethernet/apm/xgene-v2/main.c b/drivers/net/ethernet/apm/xgene-v2/main.c
index ae76977..10d4aff 100644
--- a/drivers/net/ethernet/apm/xgene-v2/main.c
+++ b/drivers/net/ethernet/apm/xgene-v2/main.c
@@ -500,9 +500,10 @@ static int xge_open(struct net_device *ndev)
xge_intr_enable(pdata);
xge_wr_csr(pdata, DMARXCTRL, 1);
+
+ phy_start(ndev->phydev);
xge_mac_enable(pdata);
netif_start_queue(ndev);
- netif_carrier_on(ndev);
return 0;
}
@@ -511,9 +512,9 @@ static int xge_close(struct net_device *ndev)
{
struct xge_pdata *pdata = netdev_priv(ndev);
- netif_carrier_off(ndev);
netif_stop_queue(ndev);
xge_mac_disable(pdata);
+ phy_stop(ndev->phydev);
xge_intr_disable(pdata);
xge_free_irq(ndev);
@@ -683,9 +684,14 @@ static int xge_probe(struct platform_device *pdev)
if (ret)
goto err;
+ spin_lock_init(&pdata->mdio_lock);
+
+ ret = xge_mdio_config(ndev);
+ if (ret)
+ goto err;
+
netif_napi_add(ndev, &pdata->napi, xge_napi, NAPI_POLL_WEIGHT);
- netif_carrier_off(ndev);
ret = register_netdev(ndev);
if (ret) {
netdev_err(ndev, "Failed to register netdev\n");
@@ -713,6 +719,7 @@ static int xge_remove(struct platform_device *pdev)
dev_close(ndev);
rtnl_unlock();
+ xge_mdio_remove(ndev);
unregister_netdev(ndev);
free_netdev(ndev);
diff --git a/drivers/net/ethernet/apm/xgene-v2/main.h b/drivers/net/ethernet/apm/xgene-v2/main.h
index ada7b0e..3e98bb4 100644
--- a/drivers/net/ethernet/apm/xgene-v2/main.h
+++ b/drivers/net/ethernet/apm/xgene-v2/main.h
@@ -65,11 +65,16 @@ struct xge_pdata {
struct xge_desc_ring *rx_ring;
struct platform_device *pdev;
char irq_name[IRQ_ID_SIZE];
+ struct mii_bus *mdio_bus;
struct net_device *ndev;
struct napi_struct napi;
struct xge_stats stats;
+ spinlock_t mdio_lock; /* mdio lock */
int phy_speed;
u8 nbufs;
};
+int xge_mdio_config(struct net_device *ndev);
+void xge_mdio_remove(struct net_device *ndev);
+
#endif /* __XGENE_ENET_V2_MAIN_H__ */
diff --git a/drivers/net/ethernet/apm/xgene-v2/mdio.c b/drivers/net/ethernet/apm/xgene-v2/mdio.c
new file mode 100644
index 0000000..43f454d
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene-v2/mdio.c
@@ -0,0 +1,178 @@
+/*
+ * Applied Micro X-Gene SoC Ethernet v2 Driver
+ *
+ * Copyright (c) 2017, Applied Micro Circuits Corporation
+ * Author(s): Iyappan Subramanian <isubramanian at apm.com>
+ * Keyur Chudgar <kchudgar at apm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "main.h"
+
+static int xge_mdio_write(struct mii_bus *bus, int phy_id, int reg, u16 data)
+{
+ struct xge_pdata *pdata = bus->priv;
+ u32 done, val = 0;
+ u8 wait = 10;
+ int ret = 0;
+
+ spin_lock(&pdata->mdio_lock);
+
+ SET_REG_BITS(&val, PHY_ADDR, phy_id);
+ SET_REG_BITS(&val, REG_ADDR, reg);
+ xge_wr_csr(pdata, MII_MGMT_ADDRESS, val);
+
+ xge_wr_csr(pdata, MII_MGMT_CONTROL, data);
+ do {
+ usleep_range(5, 10);
+ done = xge_rd_csr(pdata, MII_MGMT_INDICATORS);
+ } while ((done & MII_MGMT_BUSY) && wait--);
+
+ if (done & MII_MGMT_BUSY) {
+ dev_err(&bus->dev, "MII_MGMT write failed\n");
+ ret = -ETIMEDOUT;
+ }
+
+ spin_unlock(&pdata->mdio_lock);
+
+ return ret;
+}
+
+static int xge_mdio_read(struct mii_bus *bus, int phy_id, int reg)
+{
+ struct xge_pdata *pdata = bus->priv;
+ u32 data, done, val = 0;
+ u8 wait = 10;
+
+ spin_lock(&pdata->mdio_lock);
+
+ SET_REG_BITS(&val, PHY_ADDR, phy_id);
+ SET_REG_BITS(&val, REG_ADDR, reg);
+ xge_wr_csr(pdata, MII_MGMT_ADDRESS, val);
+
+ xge_wr_csr(pdata, MII_MGMT_COMMAND, MII_READ_CYCLE);
+ do {
+ usleep_range(5, 10);
+ done = xge_rd_csr(pdata, MII_MGMT_INDICATORS);
+ } while ((done & MII_MGMT_BUSY) && wait--);
+
+ if (done & MII_MGMT_BUSY) {
+ dev_err(&bus->dev, "MII_MGMT read failed\n");
+ data = -ETIMEDOUT;
+ goto out;
+ }
+
+ data = xge_rd_csr(pdata, MII_MGMT_STATUS);
+ xge_wr_csr(pdata, MII_MGMT_COMMAND, 0);
+
+out:
+ spin_unlock(&pdata->mdio_lock);
+
+ return data;
+}
+
+static void xge_adjust_link(struct net_device *ndev)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+ struct phy_device *phydev = ndev->phydev;
+
+ if (phydev->link) {
+ if (pdata->phy_speed != phydev->speed) {
+ pdata->phy_speed = phydev->speed;
+ xge_mac_set_speed(pdata);
+ xge_mac_enable(pdata);
+ phy_print_status(phydev);
+ }
+ } else {
+ if (pdata->phy_speed != SPEED_UNKNOWN) {
+ pdata->phy_speed = SPEED_UNKNOWN;
+ xge_mac_disable(pdata);
+ phy_print_status(phydev);
+ }
+ }
+}
+
+void xge_mdio_remove(struct net_device *ndev)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+ struct mii_bus *mdio_bus = pdata->mdio_bus;
+
+ if (ndev->phydev)
+ phy_disconnect(ndev->phydev);
+
+ if (mdio_bus->state == MDIOBUS_REGISTERED)
+ mdiobus_unregister(mdio_bus);
+
+ mdiobus_free(mdio_bus);
+}
+
+int xge_mdio_config(struct net_device *ndev)
+{
+ struct xge_pdata *pdata = netdev_priv(ndev);
+ struct device *dev = &pdata->pdev->dev;
+ struct mii_bus *mdio_bus;
+ struct phy_device *phydev;
+ int ret;
+
+ mdio_bus = mdiobus_alloc();
+ if (!mdio_bus)
+ return -ENOMEM;
+
+ mdio_bus->name = "APM X-Gene Ethernet (v2) MDIO Bus";
+ mdio_bus->read = xge_mdio_read;
+ mdio_bus->write = xge_mdio_write;
+ mdio_bus->priv = pdata;
+ mdio_bus->parent = dev;
+ snprintf(mdio_bus->id, MII_BUS_ID_SIZE, "%s-mii", dev_name(dev));
+ pdata->mdio_bus = mdio_bus;
+
+ mdio_bus->phy_mask = 0x1;
+ ret = mdiobus_register(mdio_bus);
+ if (ret)
+ goto err;
+
+ phydev = phy_find_first(mdio_bus);
+ if (!phydev) {
+ dev_err(dev, "no PHY found\n");
+ goto err;
+ }
+ phydev = phy_connect(ndev, phydev_name(phydev),
+ &xge_adjust_link,
+ pdata->resources.phy_mode);
+
+ if (IS_ERR(phydev)) {
+ netdev_err(ndev, "Could not attach to PHY\n");
+ ret = PTR_ERR(phydev);
+ goto err;
+ }
+
+ phydev->supported &= ~(SUPPORTED_10baseT_Half |
+ SUPPORTED_10baseT_Full |
+ SUPPORTED_100baseT_Half |
+ SUPPORTED_100baseT_Full |
+ SUPPORTED_1000baseT_Half |
+ SUPPORTED_AUI |
+ SUPPORTED_MII |
+ SUPPORTED_FIBRE |
+ SUPPORTED_BNC);
+ phydev->advertising = phydev->supported;
+ pdata->phy_speed = SPEED_UNKNOWN;
+
+ return 0;
+err:
+ xge_mdio_remove(ndev);
+
+ return ret;
+}
--
1.9.1
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