@@ -20,6 +20,7 @@
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <linux/stmmac.h>
+#include <linux/regmap.h>
#include "stmmac_platform.h"
#include "dwmac4.h"
@@ -37,6 +38,44 @@ struct tegra_eqos {
struct gpio_desc *reset;
};
+enum fsd_rxmux_clk {
+ FSD_RXCLK_MUX = 7,
+ FSD_RXCLK_EXTERNAL,
+ FSD_RXCLK_INTERNAL
+};
+
+struct fsd_eqos_plat_data {
+ const struct fsd_eqos_variant *fsd_eqos_instance_variant;
+ struct clk_bulk_data *clks;
+ struct device *dev;
+ int instance_num;
+};
+
+struct fsd_eqos_variant {
+ const char * const *clk_list;
+ int num_clks;
+};
+
+static const char * const fsd_eqos_instance_0_clk[] = {
+ "ptp_ref", "master_bus", "slave_bus", "tx", "rx"
+};
+
+static const char * const fsd_eqos_instance_1_clk[] = {
+ "ptp_ref", "master_bus", "slave_bus", "tx", "rx", "master2_bus",
+ "slave2_bus", "eqos_rxclk_mux", "eqos_phyrxclk", "dout_peric_rgmii_clk"
+};
+
+static const struct fsd_eqos_variant fsd_eqos_clk_info[] = {
+ {
+ .clk_list = fsd_eqos_instance_0_clk,
+ .num_clks = ARRAY_SIZE(fsd_eqos_instance_0_clk)
+ },
+ {
+ .clk_list = fsd_eqos_instance_1_clk,
+ .num_clks = ARRAY_SIZE(fsd_eqos_instance_1_clk)
+ },
+};
+
static int dwc_eth_dwmac_config_dt(struct platform_device *pdev,
struct plat_stmmacenet_data *plat_dat)
{
@@ -267,6 +306,190 @@ static int tegra_eqos_init(struct platform_device *pdev, void *priv)
return 0;
}
+static int dwc_eqos_rxmux_setup(void *priv, bool external)
+{
+ struct fsd_eqos_plat_data *plat = priv;
+
+ /* doesn't support RX clock mux */
+ if (!plat->clks[FSD_RXCLK_MUX].clk)
+ return 0;
+
+ if (external)
+ return clk_set_parent(plat->clks[FSD_RXCLK_MUX].clk,
+ plat->clks[FSD_RXCLK_EXTERNAL].clk);
+ else
+ return clk_set_parent(plat->clks[FSD_RXCLK_MUX].clk,
+ plat->clks[FSD_RXCLK_INTERNAL].clk);
+}
+
+static int dwc_eqos_setup_rxclock(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+
+ if (np && of_property_read_bool(np, "rx-clock-mux")) {
+ unsigned int reg, val;
+ struct regmap *syscon = syscon_regmap_lookup_by_phandle(np,
+ "rx-clock-mux");
+
+ if (IS_ERR(syscon)) {
+ dev_err(&pdev->dev, "couldn't get the rx-clock-mux syscon!\n");
+ return PTR_ERR(syscon);
+ }
+
+ if (of_property_read_u32_index(np, "rx-clock-mux", 1, ®)) {
+ dev_err(&pdev->dev, "couldn't get the rx-clock-mux reg. offset!\n");
+ return -EINVAL;
+ }
+
+ if (of_property_read_u32_index(np, "rx-clock-mux", 2, &val)) {
+ dev_err(&pdev->dev, "couldn't get the rx-clock-mux reg. val!\n");
+ return -EINVAL;
+ }
+
+ regmap_write(syscon, reg, val);
+ }
+
+ if (np && of_property_read_bool(np, "rx-clock-skew")) {
+ unsigned int reg, val;
+ struct regmap *syscon = syscon_regmap_lookup_by_phandle(np,
+ "rx-clock-skew");
+
+ if (IS_ERR(syscon)) {
+ dev_err(&pdev->dev, "couldn't get the rx-clock-skew syscon!\n");
+ return PTR_ERR(syscon);
+ }
+
+ if (of_property_read_u32_index(np, "rx-clock-skew", 1, ®)) {
+ dev_err(&pdev->dev, "couldn't get the rx-clock-skew reg. offset!\n");
+ return -EINVAL;
+ }
+
+ if (of_property_read_u32_index(np, "rx-clock-skew", 2, &val)) {
+ dev_err(&pdev->dev, "couldn't get the rx-clock-skew reg. val!\n");
+ return -EINVAL;
+ }
+
+ regmap_write(syscon, reg, val);
+ }
+
+ if (np && of_property_read_bool(np, "tx-clock-mux")) {
+ unsigned int reg, val;
+ struct regmap *syscon = syscon_regmap_lookup_by_phandle(np,
+ "tx-clock-mux");
+
+ if (IS_ERR(syscon)) {
+ dev_err(&pdev->dev, "couldn't get the tx-clock-mux syscon!\n");
+ return -EINVAL;
+ }
+
+ if (of_property_read_u32_index(np, "tx-clock-mux", 1, ®)) {
+ dev_err(&pdev->dev, "couldn't get the tx-clock-mux reg. offset!\n");
+ return -EINVAL;
+ }
+
+ if (of_property_read_u32_index(np, "tx-clock-mux", 2, &val)) {
+ dev_err(&pdev->dev, "couldn't get the tx-clock-mux reg. val!\n");
+ return -EINVAL;
+ }
+
+ regmap_write(syscon, reg, val);
+ }
+
+ return 0;
+}
+
+static int fsd_eqos_clk_init(struct fsd_eqos_plat_data *plat,
+ struct plat_stmmacenet_data *data)
+{
+ int ret, i;
+
+ const struct fsd_eqos_variant *fsd_eqos_variant_data = plat->fsd_eqos_instance_variant;
+
+ plat->clks = devm_kcalloc(plat->dev, fsd_eqos_variant_data->num_clks,
+ sizeof(*plat->clks), GFP_KERNEL);
+ if (!plat->clks)
+ return -ENOMEM;
+
+ for (i = 0; i < fsd_eqos_variant_data->num_clks; i++)
+ plat->clks[i].id = fsd_eqos_variant_data->clk_list[i];
+
+ ret = devm_clk_bulk_get(plat->dev, fsd_eqos_variant_data->num_clks, plat->clks);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int fsd_clks_endisable(void *priv, bool enabled)
+{
+ struct fsd_eqos_plat_data *plat = priv;
+ int ret;
+
+ const struct fsd_eqos_variant *fsd_eqos_variant_data = plat->fsd_eqos_instance_variant;
+
+ if (enabled) {
+ ret = clk_bulk_prepare_enable(fsd_eqos_variant_data->num_clks, plat->clks);
+ if (ret) {
+ dev_err(plat->dev, "failed to enable clks, err = %d\n", ret);
+ return ret;
+ }
+ } else {
+ clk_bulk_disable_unprepare(fsd_eqos_variant_data->num_clks, plat->clks);
+ }
+
+ return 0;
+}
+
+static int fsd_eqos_probe(struct platform_device *pdev,
+ struct plat_stmmacenet_data *data,
+ struct stmmac_resources *res)
+{
+ struct fsd_eqos_plat_data *priv_plat;
+ struct device_node *np = pdev->dev.of_node;
+ int ret;
+
+ priv_plat = devm_kzalloc(&pdev->dev, sizeof(*priv_plat), GFP_KERNEL);
+ if (!priv_plat) {
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ priv_plat->dev = &pdev->dev;
+ data->bus_id = of_alias_get_id(np, "eth");
+ priv_plat->instance_num = data->bus_id;
+
+ priv_plat->fsd_eqos_instance_variant = &fsd_eqos_clk_info[data->bus_id];
+
+ ret = fsd_eqos_clk_init(priv_plat, data);
+
+ data->bsp_priv = priv_plat;
+ data->clks_config = fsd_clks_endisable;
+ data->rxmux_setup = dwc_eqos_rxmux_setup;
+
+ ret = fsd_clks_endisable(priv_plat, true);
+ if (ret)
+ goto error;
+
+ ret = dwc_eqos_setup_rxclock(pdev);
+ if (ret)
+ dev_err_probe(&pdev->dev, ret, "ERROR:Unable to setup rxclock\n");
+out:
+ return 0;
+
+error:
+ priv_plat = ERR_PTR(ret);
+ goto out;
+}
+
+static int fsd_eqos_remove(struct platform_device *pdev)
+{
+ struct fsd_eqos_plat_data *priv_plat = get_stmmac_bsp_priv(&pdev->dev);
+
+ fsd_clks_endisable(priv_plat, false);
+
+ return 0;
+}
+
static int tegra_eqos_probe(struct platform_device *pdev,
struct plat_stmmacenet_data *data,
struct stmmac_resources *res)
@@ -415,6 +638,11 @@ static const struct dwc_eth_dwmac_data tegra_eqos_data = {
.remove = tegra_eqos_remove,
};
+static const struct dwc_eth_dwmac_data fsd_eqos_data = {
+ .probe = fsd_eqos_probe,
+ .remove = fsd_eqos_remove,
+};
+
static int dwc_eth_dwmac_probe(struct platform_device *pdev)
{
const struct dwc_eth_dwmac_data *data;
@@ -493,6 +721,7 @@ static int dwc_eth_dwmac_remove(struct platform_device *pdev)
static const struct of_device_id dwc_eth_dwmac_match[] = {
{ .compatible = "snps,dwc-qos-ethernet-4.10", .data = &dwc_qos_data },
{ .compatible = "nvidia,tegra186-eqos", .data = &tegra_eqos_data },
+ { .compatible = "tesla,dwc-qos-ethernet-4.21", .data = &fsd_eqos_data },
{ }
};
MODULE_DEVICE_TABLE(of, dwc_eth_dwmac_match);
@@ -3831,6 +3831,9 @@ static int __stmmac_open(struct net_device *dev,
netif_tx_start_all_queues(priv->dev);
stmmac_enable_all_dma_irq(priv);
+ if (priv->plat->rxmux_setup)
+ priv->plat->rxmux_setup(priv->plat->bsp_priv, true);
+
return 0;
irq_error:
@@ -3884,6 +3887,9 @@ static int stmmac_release(struct net_device *dev)
struct stmmac_priv *priv = netdev_priv(dev);
u32 chan;
+ if (priv->plat->rxmux_setup)
+ priv->plat->rxmux_setup(priv->plat->bsp_priv, false);
+
if (device_may_wakeup(priv->device))
phylink_speed_down(priv->phylink, false);
/* Stop and disconnect the PHY */
@@ -7383,6 +7389,9 @@ int stmmac_suspend(struct device *dev)
if (!ndev || !netif_running(ndev))
return 0;
+ if (priv->plat->rxmux_setup)
+ priv->plat->rxmux_setup(priv->plat->bsp_priv, false);
+
mutex_lock(&priv->lock);
netif_device_detach(ndev);
@@ -7546,6 +7555,9 @@ int stmmac_resume(struct device *dev)
mutex_unlock(&priv->lock);
rtnl_unlock();
+ if (priv->plat->rxmux_setup)
+ priv->plat->rxmux_setup(priv->plat->bsp_priv, true);
+
netif_device_attach(ndev);
return 0;
@@ -229,6 +229,7 @@ struct plat_stmmacenet_data {
void (*ptp_clk_freq_config)(void *priv);
int (*init)(struct platform_device *pdev, void *priv);
void (*exit)(struct platform_device *pdev, void *priv);
+ int (*rxmux_setup)(void *priv, bool external);
struct mac_device_info *(*setup)(void *priv);
int (*clks_config)(void *priv, bool enabled);
int (*crosststamp)(ktime_t *device, struct system_counterval_t *system,