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net: ftgmac100: Get link speed and duplex for NC-SI

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The ethtool of this driver uses the phy API of ethtool
to get the link information from PHY driver.
Because the NC-SI is forced on 100Mbps and full duplex,
the driver connect a fixed-link phy driver for NC-SI.
The ethtool will get the link information from the
fixed-link phy driver.

Signed-off-by: Jacky Chou <jacky_chou@aspeedtech.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20240827030513.481469-1-jacky_chou@aspeedtech.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jacky Chou 2024-08-27 11:05:13 +08:00 • committed by Jakub Kicinski
parent 59a0ad4f03
commit e24a6c8746
1 changed files with 26 additions and 2 deletions
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28
drivers/net/ethernet/faraday/ftgmac100.c
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@ -24,6 +24,7 @@
#include <linux/crc32.h> #include <linux/crc32.h>
#include <linux/if_vlan.h> #include <linux/if_vlan.h>
#include <linux/of_net.h> #include <linux/of_net.h>
#include <linux/phy_fixed.h>
#include <net/ip.h> #include <net/ip.h>
#include <net/ncsi.h> #include <net/ncsi.h>
@ -50,6 +51,15 @@
#define FTGMAC_100MHZ 100000000 #define FTGMAC_100MHZ 100000000
#define FTGMAC_25MHZ 25000000 #define FTGMAC_25MHZ 25000000
/* For NC-SI to register a fixed-link phy device */
static struct fixed_phy_status ncsi_phy_status = {
.link = 1,
.speed = SPEED_100,
.duplex = DUPLEX_FULL,
.pause = 0,
.asym_pause = 0
};
struct ftgmac100 { struct ftgmac100 {
/* Registers */ /* Registers */
struct resource *res; struct resource *res;
@ -1531,7 +1541,8 @@ static int ftgmac100_open(struct net_device *netdev)
if (netdev->phydev) { if (netdev->phydev) {
/* If we have a PHY, start polling */ /* If we have a PHY, start polling */
phy_start(netdev->phydev); phy_start(netdev->phydev);
} else if (priv->use_ncsi) { }
if (priv->use_ncsi) {
/* If using NC-SI, set our carrier on and start the stack */ /* If using NC-SI, set our carrier on and start the stack */
netif_carrier_on(netdev); netif_carrier_on(netdev);
@ -1544,6 +1555,7 @@ static int ftgmac100_open(struct net_device *netdev)
return 0; return 0;
err_ncsi: err_ncsi:
phy_stop(netdev->phydev);
napi_disable(&priv->napi); napi_disable(&priv->napi);
netif_stop_queue(netdev); netif_stop_queue(netdev);
err_alloc: err_alloc:
@ -1577,7 +1589,7 @@ static int ftgmac100_stop(struct net_device *netdev)
netif_napi_del(&priv->napi); netif_napi_del(&priv->napi);
if (netdev->phydev) if (netdev->phydev)
phy_stop(netdev->phydev); phy_stop(netdev->phydev);
else if (priv->use_ncsi) if (priv->use_ncsi)
ncsi_stop_dev(priv->ndev); ncsi_stop_dev(priv->ndev);
ftgmac100_stop_hw(priv); ftgmac100_stop_hw(priv);
@ -1715,6 +1727,9 @@ static void ftgmac100_phy_disconnect(struct net_device *netdev)
phy_disconnect(netdev->phydev); phy_disconnect(netdev->phydev);
if (of_phy_is_fixed_link(priv->dev->of_node)) if (of_phy_is_fixed_link(priv->dev->of_node))
of_phy_deregister_fixed_link(priv->dev->of_node); of_phy_deregister_fixed_link(priv->dev->of_node);
if (priv->use_ncsi)
fixed_phy_unregister(netdev->phydev);
} }
static void ftgmac100_destroy_mdio(struct net_device *netdev) static void ftgmac100_destroy_mdio(struct net_device *netdev)
@ -1792,6 +1807,7 @@ static int ftgmac100_probe(struct platform_device *pdev)
struct resource *res; struct resource *res;
int irq; int irq;
struct net_device *netdev; struct net_device *netdev;
struct phy_device *phydev;
struct ftgmac100 *priv; struct ftgmac100 *priv;
struct device_node *np; struct device_node *np;
int err = 0; int err = 0;
@ -1879,6 +1895,14 @@ static int ftgmac100_probe(struct platform_device *pdev)
err = -EINVAL; err = -EINVAL;
goto err_phy_connect; goto err_phy_connect;
} }
phydev = fixed_phy_register(PHY_POLL, &ncsi_phy_status, NULL);
err = phy_connect_direct(netdev, phydev, ftgmac100_adjust_link,
PHY_INTERFACE_MODE_MII);
if (err) {
dev_err(&pdev->dev, "Connecting PHY failed\n");
goto err_phy_connect;
}
} else if (np && of_phy_is_fixed_link(np)) { } else if (np && of_phy_is_fixed_link(np)) {
struct phy_device *phy; struct phy_device *phy;