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path: root/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c
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Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c')
-rw-r--r--drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c523
1 files changed, 523 insertions, 0 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c
new file mode 100644
index 000000000..fd1b0cc6b
--- /dev/null
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c
@@ -0,0 +1,523 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Synopsys DWC Ethernet Quality-of-Service v4.10a linux driver
+ *
+ * Copyright (C) 2016 Joao Pinto <jpinto@synopsys.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/ethtool.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/ioport.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/of_net.h>
+#include <linux/mfd/syscon.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+#include <linux/stmmac.h>
+
+#include "stmmac_platform.h"
+#include "dwmac4.h"
+
+struct tegra_eqos {
+ struct device *dev;
+ void __iomem *regs;
+
+ struct reset_control *rst;
+ struct clk *clk_master;
+ struct clk *clk_slave;
+ struct clk *clk_tx;
+ struct clk *clk_rx;
+
+ struct gpio_desc *reset;
+};
+
+static int dwc_eth_dwmac_config_dt(struct platform_device *pdev,
+ struct plat_stmmacenet_data *plat_dat)
+{
+ struct device *dev = &pdev->dev;
+ u32 burst_map = 0;
+ u32 bit_index = 0;
+ u32 a_index = 0;
+
+ if (!plat_dat->axi) {
+ plat_dat->axi = kzalloc(sizeof(struct stmmac_axi), GFP_KERNEL);
+
+ if (!plat_dat->axi)
+ return -ENOMEM;
+ }
+
+ plat_dat->axi->axi_lpi_en = device_property_read_bool(dev,
+ "snps,en-lpi");
+ if (device_property_read_u32(dev, "snps,write-requests",
+ &plat_dat->axi->axi_wr_osr_lmt)) {
+ /**
+ * Since the register has a reset value of 1, if property
+ * is missing, default to 1.
+ */
+ plat_dat->axi->axi_wr_osr_lmt = 1;
+ } else {
+ /**
+ * If property exists, to keep the behavior from dwc_eth_qos,
+ * subtract one after parsing.
+ */
+ plat_dat->axi->axi_wr_osr_lmt--;
+ }
+
+ if (device_property_read_u32(dev, "snps,read-requests",
+ &plat_dat->axi->axi_rd_osr_lmt)) {
+ /**
+ * Since the register has a reset value of 1, if property
+ * is missing, default to 1.
+ */
+ plat_dat->axi->axi_rd_osr_lmt = 1;
+ } else {
+ /**
+ * If property exists, to keep the behavior from dwc_eth_qos,
+ * subtract one after parsing.
+ */
+ plat_dat->axi->axi_rd_osr_lmt--;
+ }
+ device_property_read_u32(dev, "snps,burst-map", &burst_map);
+
+ /* converts burst-map bitmask to burst array */
+ for (bit_index = 0; bit_index < 7; bit_index++) {
+ if (burst_map & (1 << bit_index)) {
+ switch (bit_index) {
+ case 0:
+ plat_dat->axi->axi_blen[a_index] = 4; break;
+ case 1:
+ plat_dat->axi->axi_blen[a_index] = 8; break;
+ case 2:
+ plat_dat->axi->axi_blen[a_index] = 16; break;
+ case 3:
+ plat_dat->axi->axi_blen[a_index] = 32; break;
+ case 4:
+ plat_dat->axi->axi_blen[a_index] = 64; break;
+ case 5:
+ plat_dat->axi->axi_blen[a_index] = 128; break;
+ case 6:
+ plat_dat->axi->axi_blen[a_index] = 256; break;
+ default:
+ break;
+ }
+ a_index++;
+ }
+ }
+
+ /* dwc-qos needs GMAC4, AAL, TSO and PMT */
+ plat_dat->has_gmac4 = 1;
+ plat_dat->dma_cfg->aal = 1;
+ plat_dat->tso_en = 1;
+ plat_dat->pmt = 1;
+
+ return 0;
+}
+
+static void *dwc_qos_probe(struct platform_device *pdev,
+ struct plat_stmmacenet_data *plat_dat,
+ struct stmmac_resources *stmmac_res)
+{
+ int err;
+
+ plat_dat->stmmac_clk = devm_clk_get(&pdev->dev, "apb_pclk");
+ if (IS_ERR(plat_dat->stmmac_clk)) {
+ dev_err(&pdev->dev, "apb_pclk clock not found.\n");
+ return ERR_CAST(plat_dat->stmmac_clk);
+ }
+
+ err = clk_prepare_enable(plat_dat->stmmac_clk);
+ if (err < 0) {
+ dev_err(&pdev->dev, "failed to enable apb_pclk clock: %d\n",
+ err);
+ return ERR_PTR(err);
+ }
+
+ plat_dat->pclk = devm_clk_get(&pdev->dev, "phy_ref_clk");
+ if (IS_ERR(plat_dat->pclk)) {
+ dev_err(&pdev->dev, "phy_ref_clk clock not found.\n");
+ err = PTR_ERR(plat_dat->pclk);
+ goto disable;
+ }
+
+ err = clk_prepare_enable(plat_dat->pclk);
+ if (err < 0) {
+ dev_err(&pdev->dev, "failed to enable phy_ref clock: %d\n",
+ err);
+ goto disable;
+ }
+
+ return NULL;
+
+disable:
+ clk_disable_unprepare(plat_dat->stmmac_clk);
+ return ERR_PTR(err);
+}
+
+static int dwc_qos_remove(struct platform_device *pdev)
+{
+ struct net_device *ndev = platform_get_drvdata(pdev);
+ struct stmmac_priv *priv = netdev_priv(ndev);
+
+ clk_disable_unprepare(priv->plat->pclk);
+ clk_disable_unprepare(priv->plat->stmmac_clk);
+
+ return 0;
+}
+
+#define SDMEMCOMPPADCTRL 0x8800
+#define SDMEMCOMPPADCTRL_PAD_E_INPUT_OR_E_PWRD BIT(31)
+
+#define AUTO_CAL_CONFIG 0x8804
+#define AUTO_CAL_CONFIG_START BIT(31)
+#define AUTO_CAL_CONFIG_ENABLE BIT(29)
+
+#define AUTO_CAL_STATUS 0x880c
+#define AUTO_CAL_STATUS_ACTIVE BIT(31)
+
+static void tegra_eqos_fix_speed(void *priv, unsigned int speed)
+{
+ struct tegra_eqos *eqos = priv;
+ unsigned long rate = 125000000;
+ bool needs_calibration = false;
+ u32 value;
+ int err;
+
+ switch (speed) {
+ case SPEED_1000:
+ needs_calibration = true;
+ rate = 125000000;
+ break;
+
+ case SPEED_100:
+ needs_calibration = true;
+ rate = 25000000;
+ break;
+
+ case SPEED_10:
+ rate = 2500000;
+ break;
+
+ default:
+ dev_err(eqos->dev, "invalid speed %u\n", speed);
+ break;
+ }
+
+ if (needs_calibration) {
+ /* calibrate */
+ value = readl(eqos->regs + SDMEMCOMPPADCTRL);
+ value |= SDMEMCOMPPADCTRL_PAD_E_INPUT_OR_E_PWRD;
+ writel(value, eqos->regs + SDMEMCOMPPADCTRL);
+
+ udelay(1);
+
+ value = readl(eqos->regs + AUTO_CAL_CONFIG);
+ value |= AUTO_CAL_CONFIG_START | AUTO_CAL_CONFIG_ENABLE;
+ writel(value, eqos->regs + AUTO_CAL_CONFIG);
+
+ err = readl_poll_timeout_atomic(eqos->regs + AUTO_CAL_STATUS,
+ value,
+ value & AUTO_CAL_STATUS_ACTIVE,
+ 1, 10);
+ if (err < 0) {
+ dev_err(eqos->dev, "calibration did not start\n");
+ goto failed;
+ }
+
+ err = readl_poll_timeout_atomic(eqos->regs + AUTO_CAL_STATUS,
+ value,
+ (value & AUTO_CAL_STATUS_ACTIVE) == 0,
+ 20, 200);
+ if (err < 0) {
+ dev_err(eqos->dev, "calibration didn't finish\n");
+ goto failed;
+ }
+
+ failed:
+ value = readl(eqos->regs + SDMEMCOMPPADCTRL);
+ value &= ~SDMEMCOMPPADCTRL_PAD_E_INPUT_OR_E_PWRD;
+ writel(value, eqos->regs + SDMEMCOMPPADCTRL);
+ } else {
+ value = readl(eqos->regs + AUTO_CAL_CONFIG);
+ value &= ~AUTO_CAL_CONFIG_ENABLE;
+ writel(value, eqos->regs + AUTO_CAL_CONFIG);
+ }
+
+ err = clk_set_rate(eqos->clk_tx, rate);
+ if (err < 0)
+ dev_err(eqos->dev, "failed to set TX rate: %d\n", err);
+}
+
+static int tegra_eqos_init(struct platform_device *pdev, void *priv)
+{
+ struct tegra_eqos *eqos = priv;
+ unsigned long rate;
+ u32 value;
+
+ rate = clk_get_rate(eqos->clk_slave);
+
+ value = (rate / 1000000) - 1;
+ writel(value, eqos->regs + GMAC_1US_TIC_COUNTER);
+
+ return 0;
+}
+
+static void *tegra_eqos_probe(struct platform_device *pdev,
+ struct plat_stmmacenet_data *data,
+ struct stmmac_resources *res)
+{
+ struct device *dev = &pdev->dev;
+ struct tegra_eqos *eqos;
+ int err;
+
+ eqos = devm_kzalloc(&pdev->dev, sizeof(*eqos), GFP_KERNEL);
+ if (!eqos) {
+ err = -ENOMEM;
+ goto error;
+ }
+
+ eqos->dev = &pdev->dev;
+ eqos->regs = res->addr;
+
+ if (!is_of_node(dev->fwnode))
+ goto bypass_clk_reset_gpio;
+
+ eqos->clk_master = devm_clk_get(&pdev->dev, "master_bus");
+ if (IS_ERR(eqos->clk_master)) {
+ err = PTR_ERR(eqos->clk_master);
+ goto error;
+ }
+
+ err = clk_prepare_enable(eqos->clk_master);
+ if (err < 0)
+ goto error;
+
+ eqos->clk_slave = devm_clk_get(&pdev->dev, "slave_bus");
+ if (IS_ERR(eqos->clk_slave)) {
+ err = PTR_ERR(eqos->clk_slave);
+ goto disable_master;
+ }
+
+ data->stmmac_clk = eqos->clk_slave;
+
+ err = clk_prepare_enable(eqos->clk_slave);
+ if (err < 0)
+ goto disable_master;
+
+ eqos->clk_rx = devm_clk_get(&pdev->dev, "rx");
+ if (IS_ERR(eqos->clk_rx)) {
+ err = PTR_ERR(eqos->clk_rx);
+ goto disable_slave;
+ }
+
+ err = clk_prepare_enable(eqos->clk_rx);
+ if (err < 0)
+ goto disable_slave;
+
+ eqos->clk_tx = devm_clk_get(&pdev->dev, "tx");
+ if (IS_ERR(eqos->clk_tx)) {
+ err = PTR_ERR(eqos->clk_tx);
+ goto disable_rx;
+ }
+
+ err = clk_prepare_enable(eqos->clk_tx);
+ if (err < 0)
+ goto disable_rx;
+
+ eqos->reset = devm_gpiod_get(&pdev->dev, "phy-reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(eqos->reset)) {
+ err = PTR_ERR(eqos->reset);
+ goto disable_tx;
+ }
+
+ usleep_range(2000, 4000);
+ gpiod_set_value(eqos->reset, 0);
+
+ /* MDIO bus was already reset just above */
+ data->mdio_bus_data->needs_reset = false;
+
+ eqos->rst = devm_reset_control_get(&pdev->dev, "eqos");
+ if (IS_ERR(eqos->rst)) {
+ err = PTR_ERR(eqos->rst);
+ goto reset_phy;
+ }
+
+ err = reset_control_assert(eqos->rst);
+ if (err < 0)
+ goto reset_phy;
+
+ usleep_range(2000, 4000);
+
+ err = reset_control_deassert(eqos->rst);
+ if (err < 0)
+ goto reset_phy;
+
+ usleep_range(2000, 4000);
+
+bypass_clk_reset_gpio:
+ data->fix_mac_speed = tegra_eqos_fix_speed;
+ data->init = tegra_eqos_init;
+ data->bsp_priv = eqos;
+ data->sph_disable = 1;
+
+ err = tegra_eqos_init(pdev, eqos);
+ if (err < 0)
+ goto reset;
+
+out:
+ return eqos;
+
+reset:
+ reset_control_assert(eqos->rst);
+reset_phy:
+ gpiod_set_value(eqos->reset, 1);
+disable_tx:
+ clk_disable_unprepare(eqos->clk_tx);
+disable_rx:
+ clk_disable_unprepare(eqos->clk_rx);
+disable_slave:
+ clk_disable_unprepare(eqos->clk_slave);
+disable_master:
+ clk_disable_unprepare(eqos->clk_master);
+error:
+ eqos = ERR_PTR(err);
+ goto out;
+}
+
+static int tegra_eqos_remove(struct platform_device *pdev)
+{
+ struct tegra_eqos *eqos = get_stmmac_bsp_priv(&pdev->dev);
+
+ reset_control_assert(eqos->rst);
+ gpiod_set_value(eqos->reset, 1);
+ clk_disable_unprepare(eqos->clk_tx);
+ clk_disable_unprepare(eqos->clk_rx);
+ clk_disable_unprepare(eqos->clk_slave);
+ clk_disable_unprepare(eqos->clk_master);
+
+ return 0;
+}
+
+struct dwc_eth_dwmac_data {
+ void *(*probe)(struct platform_device *pdev,
+ struct plat_stmmacenet_data *data,
+ struct stmmac_resources *res);
+ int (*remove)(struct platform_device *pdev);
+};
+
+static const struct dwc_eth_dwmac_data dwc_qos_data = {
+ .probe = dwc_qos_probe,
+ .remove = dwc_qos_remove,
+};
+
+static const struct dwc_eth_dwmac_data tegra_eqos_data = {
+ .probe = tegra_eqos_probe,
+ .remove = tegra_eqos_remove,
+};
+
+static int dwc_eth_dwmac_probe(struct platform_device *pdev)
+{
+ const struct dwc_eth_dwmac_data *data;
+ struct plat_stmmacenet_data *plat_dat;
+ struct stmmac_resources stmmac_res;
+ void *priv;
+ int ret;
+
+ data = device_get_match_data(&pdev->dev);
+
+ memset(&stmmac_res, 0, sizeof(struct stmmac_resources));
+
+ /**
+ * Since stmmac_platform supports name IRQ only, basic platform
+ * resource initialization is done in the glue logic.
+ */
+ stmmac_res.irq = platform_get_irq(pdev, 0);
+ if (stmmac_res.irq < 0)
+ return stmmac_res.irq;
+ stmmac_res.wol_irq = stmmac_res.irq;
+
+ stmmac_res.addr = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(stmmac_res.addr))
+ return PTR_ERR(stmmac_res.addr);
+
+ plat_dat = stmmac_probe_config_dt(pdev, &stmmac_res.mac);
+ if (IS_ERR(plat_dat))
+ return PTR_ERR(plat_dat);
+
+ priv = data->probe(pdev, plat_dat, &stmmac_res);
+ if (IS_ERR(priv)) {
+ ret = PTR_ERR(priv);
+
+ if (ret != -EPROBE_DEFER)
+ dev_err(&pdev->dev, "failed to probe subdriver: %d\n",
+ ret);
+
+ goto remove_config;
+ }
+
+ ret = dwc_eth_dwmac_config_dt(pdev, plat_dat);
+ if (ret)
+ goto remove;
+
+ ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
+ if (ret)
+ goto remove;
+
+ return ret;
+
+remove:
+ data->remove(pdev);
+remove_config:
+ stmmac_remove_config_dt(pdev, plat_dat);
+
+ return ret;
+}
+
+static int dwc_eth_dwmac_remove(struct platform_device *pdev)
+{
+ struct net_device *ndev = platform_get_drvdata(pdev);
+ struct stmmac_priv *priv = netdev_priv(ndev);
+ const struct dwc_eth_dwmac_data *data;
+ int err;
+
+ data = device_get_match_data(&pdev->dev);
+
+ err = stmmac_dvr_remove(&pdev->dev);
+ if (err < 0)
+ dev_err(&pdev->dev, "failed to remove platform: %d\n", err);
+
+ err = data->remove(pdev);
+ if (err < 0)
+ dev_err(&pdev->dev, "failed to remove subdriver: %d\n", err);
+
+ stmmac_remove_config_dt(pdev, priv->plat);
+
+ return err;
+}
+
+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 },
+ { }
+};
+MODULE_DEVICE_TABLE(of, dwc_eth_dwmac_match);
+
+static struct platform_driver dwc_eth_dwmac_driver = {
+ .probe = dwc_eth_dwmac_probe,
+ .remove = dwc_eth_dwmac_remove,
+ .driver = {
+ .name = "dwc-eth-dwmac",
+ .pm = &stmmac_pltfr_pm_ops,
+ .of_match_table = dwc_eth_dwmac_match,
+ },
+};
+module_platform_driver(dwc_eth_dwmac_driver);
+
+MODULE_AUTHOR("Joao Pinto <jpinto@synopsys.com>");
+MODULE_DESCRIPTION("Synopsys DWC Ethernet Quality-of-Service v4.10a driver");
+MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 09:57:03 +0000