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net: fman: memac: Add serdes support 

This adds support for using a serdes which has to be configured. This is
primarly in preparation for phylink conversion, which will then change the
serdes mode dynamically.

Signed-off-by: Sean Anderson <sean.anderson@seco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sean Anderson 2022-10-17 16:22:36 -04:00 committed by David S. Miller
parent f392a18464
commit 0fc83bd795
1 changed files with 47 additions and 2 deletions
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49
drivers/net/ethernet/freescale/fman/fman_memac.c
View File

@ -13,6 +13,7 @@
#include <linux/io.h>
#include <linux/phy.h>
#include <linux/phy_fixed.h>
#include <linux/phy/phy.h>
#include <linux/of_mdio.h>
/* PCS registers */
@ -324,6 +325,7 @@ struct fman_mac {
void *fm;
struct fman_rev_info fm_rev_info;
bool basex_if;
struct phy *serdes;
struct phy_device *pcsphy;
bool allmulti_enabled;
};
@ -1203,17 +1205,56 @@ int memac_initialization(struct mac_device *mac_dev,
}
}
memac->serdes = devm_of_phy_get(mac_dev->dev, mac_node, "serdes");
err = PTR_ERR(memac->serdes);
if (err == -ENODEV || err == -ENOSYS) {
dev_dbg(mac_dev->dev, "could not get (optional) serdes\n");
memac->serdes = NULL;
} else if (IS_ERR(memac->serdes)) {
dev_err_probe(mac_dev->dev, err, "could not get serdes\n");
goto _return_fm_mac_free;
} else {
err = phy_init(memac->serdes);
if (err) {
dev_err_probe(mac_dev->dev, err,
"could not initialize serdes\n");
goto _return_fm_mac_free;
}
err = phy_power_on(memac->serdes);
if (err) {
dev_err_probe(mac_dev->dev, err,
"could not power on serdes\n");
goto _return_phy_exit;
}
if (memac->phy_if == PHY_INTERFACE_MODE_SGMII ||
memac->phy_if == PHY_INTERFACE_MODE_1000BASEX ||
memac->phy_if == PHY_INTERFACE_MODE_2500BASEX ||
memac->phy_if == PHY_INTERFACE_MODE_QSGMII ||
memac->phy_if == PHY_INTERFACE_MODE_XGMII) {
err = phy_set_mode_ext(memac->serdes, PHY_MODE_ETHERNET,
memac->phy_if);
if (err) {
dev_err_probe(mac_dev->dev, err,
"could not set serdes mode to %s\n",
phy_modes(memac->phy_if));
goto _return_phy_power_off;
}
}
}
if (!mac_dev->phy_node && of_phy_is_fixed_link(mac_node)) {
struct phy_device *phy;
err = of_phy_register_fixed_link(mac_node);
if (err)
goto _return_fm_mac_free;
goto _return_phy_power_off;
fixed_link = kzalloc(sizeof(*fixed_link), GFP_KERNEL);
if (!fixed_link) {
err = -ENOMEM;
goto _return_fm_mac_free;
goto _return_phy_power_off;
}
mac_dev->phy_node = of_node_get(mac_node);
@ -1242,6 +1283,10 @@ int memac_initialization(struct mac_device *mac_dev,
goto _return;
_return_phy_power_off:
phy_power_off(memac->serdes);
_return_phy_exit:
phy_exit(memac->serdes);
_return_fixed_link_free:
kfree(fixed_link);
_return_fm_mac_free: