Commit 8089a96f authored by Iyappan Subramanian's avatar Iyappan Subramanian Committed by David S. Miller

drivers: net: xgene: Add backward compatibility

This patch adds xgene_enet_check_phy_hanlde() function that checks whether
MDIO driver is probed successfully and sets pdata->mdio_driver to true.
If MDIO driver is not probed, ethernet driver falls back to backward
compatibility mode.

Since enum xgene_enet_cmd is used by MDIO driver, removing this from
ethernet driver.
Signed-off-by: default avatarIyappan Subramanian <isubramanian@apm.com>
Tested-by: default avatarFushen Chen <fchen@apm.com>
Tested-by: default avatarToan Le <toanle@apm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 43b3cf66
......@@ -572,7 +572,9 @@ static void xgene_gmac_init(struct xgene_enet_pdata *pdata)
{
u32 value;
xgene_gmac_reset(pdata);
if (!pdata->mdio_driver)
xgene_gmac_reset(pdata);
xgene_gmac_set_speed(pdata);
xgene_gmac_set_mac_addr(pdata);
......@@ -680,6 +682,11 @@ static int xgene_enet_reset(struct xgene_enet_pdata *pdata)
if (!xgene_ring_mgr_init(pdata))
return -ENODEV;
if (pdata->mdio_driver) {
xgene_enet_config_ring_if_assoc(pdata);
return 0;
}
if (dev->of_node) {
clk_prepare_enable(pdata->clk);
udelay(5);
......@@ -799,21 +806,47 @@ static void xgene_enet_adjust_link(struct net_device *ndev)
}
}
static int xgene_enet_phy_connect(struct net_device *ndev)
#ifdef CONFIG_ACPI
static struct acpi_device *acpi_phy_find_device(struct device *dev)
{
struct acpi_reference_args args;
struct fwnode_handle *fw_node;
int status;
fw_node = acpi_fwnode_handle(ACPI_COMPANION(dev));
status = acpi_node_get_property_reference(fw_node, "phy-handle", 0,
&args);
if (ACPI_FAILURE(status)) {
dev_dbg(dev, "No matching phy in ACPI table\n");
return NULL;
}
return args.adev;
}
#endif
int xgene_enet_phy_connect(struct net_device *ndev)
{
struct xgene_enet_pdata *pdata = netdev_priv(ndev);
struct device_node *phy_np;
struct device_node *np;
struct phy_device *phy_dev;
struct device *dev = &pdata->pdev->dev;
struct acpi_device *adev;
int i;
if (dev->of_node) {
phy_np = of_parse_phandle(dev->of_node, "phy-handle", 0);
if (!phy_np) {
for (i = 0 ; i < 2; i++) {
np = of_parse_phandle(dev->of_node, "phy-handle", i);
if (np)
break;
}
if (!np) {
netdev_dbg(ndev, "No phy-handle found in DT\n");
return -ENODEV;
}
phy_dev = of_phy_connect(ndev, phy_np, &xgene_enet_adjust_link,
phy_dev = of_phy_connect(ndev, np, &xgene_enet_adjust_link,
0, pdata->phy_mode);
if (!phy_dev) {
netdev_err(ndev, "Could not connect to PHY\n");
......@@ -822,6 +855,11 @@ static int xgene_enet_phy_connect(struct net_device *ndev)
pdata->phy_dev = phy_dev;
} else {
#ifdef CONFIG_ACPI
adev = acpi_phy_find_device(dev);
if (adev)
pdata->phy_dev = adev->driver_data;
phy_dev = pdata->phy_dev;
if (!phy_dev ||
......@@ -830,6 +868,7 @@ static int xgene_enet_phy_connect(struct net_device *ndev)
netdev_err(ndev, "Could not connect to PHY\n");
return -ENODEV;
}
#endif
}
pdata->phy_speed = SPEED_UNKNOWN;
......@@ -930,6 +969,12 @@ int xgene_enet_mdio_config(struct xgene_enet_pdata *pdata)
return ret;
}
void xgene_enet_phy_disconnect(struct xgene_enet_pdata *pdata)
{
if (pdata->phy_dev)
phy_disconnect(pdata->phy_dev);
}
void xgene_enet_mdio_remove(struct xgene_enet_pdata *pdata)
{
if (pdata->phy_dev)
......
......@@ -301,11 +301,6 @@ enum xgene_enet_ring_bufnum {
RING_BUFNUM_INVALID
};
enum xgene_enet_cmd {
XGENE_ENET_WR_CMD = BIT(31),
XGENE_ENET_RD_CMD = BIT(30)
};
enum xgene_enet_err_code {
HBF_READ_DATA = 3,
HBF_LL_READ = 4,
......@@ -351,6 +346,8 @@ void xgene_enet_parse_error(struct xgene_enet_desc_ring *ring,
int xgene_enet_mdio_config(struct xgene_enet_pdata *pdata);
void xgene_enet_mdio_remove(struct xgene_enet_pdata *pdata);
bool xgene_ring_mgr_init(struct xgene_enet_pdata *p);
int xgene_enet_phy_connect(struct net_device *ndev);
void xgene_enet_phy_disconnect(struct xgene_enet_pdata *pdata);
extern const struct xgene_mac_ops xgene_gmac_ops;
extern const struct xgene_port_ops xgene_gport_ops;
......
......@@ -763,7 +763,7 @@ static int xgene_enet_close(struct net_device *ndev)
mac_ops->tx_disable(pdata);
mac_ops->rx_disable(pdata);
if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII)
if (pdata->phy_dev)
phy_stop(pdata->phy_dev);
else
cancel_delayed_work_sync(&pdata->link_work);
......@@ -1295,6 +1295,23 @@ static int xgene_enet_get_irqs(struct xgene_enet_pdata *pdata)
return 0;
}
static int xgene_enet_check_phy_handle(struct xgene_enet_pdata *pdata)
{
int ret;
if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII)
return 0;
if (!IS_ENABLED(CONFIG_MDIO_XGENE))
return 0;
ret = xgene_enet_phy_connect(pdata->ndev);
if (!ret)
pdata->mdio_driver = true;
return 0;
}
static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata)
{
struct platform_device *pdev;
......@@ -1380,6 +1397,10 @@ static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata)
if (ret)
return ret;
ret = xgene_enet_check_phy_handle(pdata);
if (ret)
return ret;
pdata->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(pdata->clk)) {
/* Firmware may have set up the clock already. */
......@@ -1574,7 +1595,7 @@ static int xgene_enet_probe(struct platform_device *pdev)
struct net_device *ndev;
struct xgene_enet_pdata *pdata;
struct device *dev = &pdev->dev;
const struct xgene_mac_ops *mac_ops;
void (*link_state)(struct work_struct *);
const struct of_device_id *of_id;
int ret;
......@@ -1636,14 +1657,17 @@ static int xgene_enet_probe(struct platform_device *pdev)
if (ret)
goto err_netdev;
mac_ops = pdata->mac_ops;
if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII) {
ret = xgene_enet_mdio_config(pdata);
if (ret)
goto err_netdev;
} else {
INIT_DELAYED_WORK(&pdata->link_work, mac_ops->link_state);
link_state = pdata->mac_ops->link_state;
if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) {
INIT_DELAYED_WORK(&pdata->link_work, link_state);
} else if (!pdata->mdio_driver) {
if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII)
ret = xgene_enet_mdio_config(pdata);
else
INIT_DELAYED_WORK(&pdata->link_work, link_state);
}
if (ret)
goto err;
xgene_enet_napi_add(pdata);
ret = register_netdev(ndev);
......@@ -1676,11 +1700,11 @@ static int xgene_enet_remove(struct platform_device *pdev)
dev_close(ndev);
rtnl_unlock();
mac_ops->rx_disable(pdata);
mac_ops->tx_disable(pdata);
if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII)
if (pdata->mdio_driver)
xgene_enet_phy_disconnect(pdata);
else if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII)
xgene_enet_mdio_remove(pdata);
unregister_netdev(ndev);
pdata->port_ops->shutdown(pdata);
xgene_enet_delete_desc_rings(pdata);
......
......@@ -38,6 +38,7 @@
#include "xgene_enet_hw.h"
#include "xgene_enet_cle.h"
#include "xgene_enet_ring2.h"
#include "../../../phy/mdio-xgene.h"
#define XGENE_DRV_VERSION "v1.0"
#define XGENE_ENET_MAX_MTU 1536
......@@ -214,6 +215,7 @@ struct xgene_enet_pdata {
u32 mss;
u8 tx_delay;
u8 rx_delay;
bool mdio_driver;
};
struct xgene_indirect_ctl {
......@@ -223,34 +225,6 @@ struct xgene_indirect_ctl {
void __iomem *cmd_done;
};
/* Set the specified value into a bit-field defined by its starting position
* and length within a single u64.
*/
static inline u64 xgene_enet_set_field_value(int pos, int len, u64 val)
{
return (val & ((1ULL << len) - 1)) << pos;
}
#define SET_VAL(field, val) \
xgene_enet_set_field_value(field ## _POS, field ## _LEN, val)
#define SET_BIT(field) \
xgene_enet_set_field_value(field ## _POS, 1, 1)
/* Get the value from a bit-field defined by its starting position
* and length within the specified u64.
*/
static inline u64 xgene_enet_get_field_value(int pos, int len, u64 src)
{
return (src >> pos) & ((1ULL << len) - 1);
}
#define GET_VAL(field, src) \
xgene_enet_get_field_value(field ## _POS, field ## _LEN, src)
#define GET_BIT(field, src) \
xgene_enet_get_field_value(field ## _POS, 1, src)
static inline struct device *ndev_to_dev(struct net_device *ndev)
{
return ndev->dev.parent;
......
......@@ -366,7 +366,9 @@ static void xgene_sgmac_init(struct xgene_enet_pdata *p)
u32 cfg_bypass_reg, rx_dv_gate_reg;
u32 data, offset;
xgene_sgmac_reset(p);
if (!(p->enet_id == XGENE_ENET2 && p->mdio_driver))
xgene_sgmac_reset(p);
xgene_sgmii_enable_autoneg(p);
xgene_sgmac_set_speed(p);
xgene_sgmac_set_mac_addr(p);
......@@ -445,6 +447,11 @@ static int xgene_enet_reset(struct xgene_enet_pdata *p)
if (!xgene_ring_mgr_init(p))
return -ENODEV;
if (p->mdio_driver && p->enet_id == XGENE_ENET2) {
xgene_enet_config_ring_if_assoc(p);
return 0;
}
if (p->enet_id == XGENE_ENET2)
xgene_enet_wr_clkrst_csr(p, XGENET_CONFIG_REG_ADDR, SGMII_EN);
......
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