Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 245 insertions, 0 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c
new file mode 100644
index 000000000..62a69a91a
--- /dev/null
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c
@@ -0,0 +1,245 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Oxford Semiconductor OXNAS DWMAC glue layer
+ *
+ * Copyright (C) 2016 Neil Armstrong <narmstrong@baylibre.com>
+ * Copyright (C) 2014 Daniel Golle <daniel@makrotopia.org>
+ * Copyright (C) 2013 Ma Haijun <mahaijuns@gmail.com>
+ * Copyright (C) 2012 John Crispin <blogic@openwrt.org>
+ */
+
+#include <linux/device.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+#include <linux/stmmac.h>
+
+#include "stmmac_platform.h"
+
+/* System Control regmap offsets */
+#define OXNAS_DWMAC_CTRL_REGOFFSET	0x78
+#define OXNAS_DWMAC_DELAY_REGOFFSET	0x100
+
+/* Control Register */
+#define DWMAC_CKEN_RX_IN        14
+#define DWMAC_CKEN_RXN_OUT      13
+#define DWMAC_CKEN_RX_OUT       12
+#define DWMAC_CKEN_TX_IN        10
+#define DWMAC_CKEN_TXN_OUT      9
+#define DWMAC_CKEN_TX_OUT       8
+#define DWMAC_RX_SOURCE         7
+#define DWMAC_TX_SOURCE         6
+#define DWMAC_LOW_TX_SOURCE     4
+#define DWMAC_AUTO_TX_SOURCE    3
+#define DWMAC_RGMII             2
+#define DWMAC_SIMPLE_MUX        1
+#define DWMAC_CKEN_GTX          0
+
+/* Delay register */
+#define DWMAC_TX_VARDELAY_SHIFT		0
+#define DWMAC_TXN_VARDELAY_SHIFT	8
+#define DWMAC_RX_VARDELAY_SHIFT		16
+#define DWMAC_RXN_VARDELAY_SHIFT	24
+#define DWMAC_TX_VARDELAY(d)		((d) << DWMAC_TX_VARDELAY_SHIFT)
+#define DWMAC_TXN_VARDELAY(d)		((d) << DWMAC_TXN_VARDELAY_SHIFT)
+#define DWMAC_RX_VARDELAY(d)		((d) << DWMAC_RX_VARDELAY_SHIFT)
+#define DWMAC_RXN_VARDELAY(d)		((d) << DWMAC_RXN_VARDELAY_SHIFT)
+
+struct oxnas_dwmac;
+
+struct oxnas_dwmac_data {
+	int (*setup)(struct oxnas_dwmac *dwmac);
+};
+
+struct oxnas_dwmac {
+	struct device	*dev;
+	struct clk	*clk;
+	struct regmap	*regmap;
+	const struct oxnas_dwmac_data	*data;
+};
+
+static int oxnas_dwmac_setup_ox810se(struct oxnas_dwmac *dwmac)
+{
+	unsigned int value;
+	int ret;
+
+	ret = regmap_read(dwmac->regmap, OXNAS_DWMAC_CTRL_REGOFFSET, &value);
+	if (ret < 0)
+		return ret;
+
+	/* Enable GMII_GTXCLK to follow GMII_REFCLK, required for gigabit PHY */
+	value |= BIT(DWMAC_CKEN_GTX)		|
+		 /* Use simple mux for 25/125 Mhz clock switching */
+		 BIT(DWMAC_SIMPLE_MUX);
+
+	regmap_write(dwmac->regmap, OXNAS_DWMAC_CTRL_REGOFFSET, value);
+
+	return 0;
+}
+
+static int oxnas_dwmac_setup_ox820(struct oxnas_dwmac *dwmac)
+{
+	unsigned int value;
+	int ret;
+
+	ret = regmap_read(dwmac->regmap, OXNAS_DWMAC_CTRL_REGOFFSET, &value);
+	if (ret < 0)
+		return ret;
+
+	/* Enable GMII_GTXCLK to follow GMII_REFCLK, required for gigabit PHY */
+	value |= BIT(DWMAC_CKEN_GTX)		|
+		 /* Use simple mux for 25/125 Mhz clock switching */
+		BIT(DWMAC_SIMPLE_MUX)		|
+		/* set auto switch tx clock source */
+		BIT(DWMAC_AUTO_TX_SOURCE)	|
+		/* enable tx & rx vardelay */
+		BIT(DWMAC_CKEN_TX_OUT)		|
+		BIT(DWMAC_CKEN_TXN_OUT)	|
+		BIT(DWMAC_CKEN_TX_IN)		|
+		BIT(DWMAC_CKEN_RX_OUT)		|
+		BIT(DWMAC_CKEN_RXN_OUT)	|
+		BIT(DWMAC_CKEN_RX_IN);
+	regmap_write(dwmac->regmap, OXNAS_DWMAC_CTRL_REGOFFSET, value);
+
+	/* set tx & rx vardelay */
+	value = DWMAC_TX_VARDELAY(4)	|
+		DWMAC_TXN_VARDELAY(2)	|
+		DWMAC_RX_VARDELAY(10)	|
+		DWMAC_RXN_VARDELAY(8);
+	regmap_write(dwmac->regmap, OXNAS_DWMAC_DELAY_REGOFFSET, value);
+
+	return 0;
+}
+
+static int oxnas_dwmac_init(struct platform_device *pdev, void *priv)
+{
+	struct oxnas_dwmac *dwmac = priv;
+	int ret;
+
+	/* Reset HW here before changing the glue configuration */
+	ret = device_reset(dwmac->dev);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(dwmac->clk);
+	if (ret)
+		return ret;
+
+	ret = dwmac->data->setup(dwmac);
+	if (ret)
+		clk_disable_unprepare(dwmac->clk);
+
+	return ret;
+}
+
+static void oxnas_dwmac_exit(struct platform_device *pdev, void *priv)
+{
+	struct oxnas_dwmac *dwmac = priv;
+
+	clk_disable_unprepare(dwmac->clk);
+}
+
+static int oxnas_dwmac_probe(struct platform_device *pdev)
+{
+	struct plat_stmmacenet_data *plat_dat;
+	struct stmmac_resources stmmac_res;
+	struct oxnas_dwmac *dwmac;
+	int ret;
+
+	ret = stmmac_get_platform_resources(pdev, &stmmac_res);
+	if (ret)
+		return ret;
+
+	plat_dat = stmmac_probe_config_dt(pdev, stmmac_res.mac);
+	if (IS_ERR(plat_dat))
+		return PTR_ERR(plat_dat);
+
+	dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);
+	if (!dwmac) {
+		ret = -ENOMEM;
+		goto err_remove_config_dt;
+	}
+
+	dwmac->data = (const struct oxnas_dwmac_data *)of_device_get_match_data(&pdev->dev);
+	if (!dwmac->data) {
+		ret = -EINVAL;
+		goto err_remove_config_dt;
+	}
+
+	dwmac->dev = &pdev->dev;
+	plat_dat->bsp_priv = dwmac;
+	plat_dat->init = oxnas_dwmac_init;
+	plat_dat->exit = oxnas_dwmac_exit;
+
+	dwmac->regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
+							"oxsemi,sys-ctrl");
+	if (IS_ERR(dwmac->regmap)) {
+		dev_err(&pdev->dev, "failed to have sysctrl regmap\n");
+		ret = PTR_ERR(dwmac->regmap);
+		goto err_remove_config_dt;
+	}
+
+	dwmac->clk = devm_clk_get(&pdev->dev, "gmac");
+	if (IS_ERR(dwmac->clk)) {
+		ret = PTR_ERR(dwmac->clk);
+		goto err_remove_config_dt;
+	}
+
+	ret = oxnas_dwmac_init(pdev, plat_dat->bsp_priv);
+	if (ret)
+		goto err_remove_config_dt;
+
+	ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
+	if (ret)
+		goto err_dwmac_exit;
+
+
+	return 0;
+
+err_dwmac_exit:
+	oxnas_dwmac_exit(pdev, plat_dat->bsp_priv);
+err_remove_config_dt:
+	stmmac_remove_config_dt(pdev, plat_dat);
+
+	return ret;
+}
+
+static const struct oxnas_dwmac_data ox810se_dwmac_data = {
+	.setup = oxnas_dwmac_setup_ox810se,
+};
+
+static const struct oxnas_dwmac_data ox820_dwmac_data = {
+	.setup = oxnas_dwmac_setup_ox820,
+};
+
+static const struct of_device_id oxnas_dwmac_match[] = {
+	{
+		.compatible = "oxsemi,ox810se-dwmac",
+		.data = &ox810se_dwmac_data,
+	},
+	{
+		.compatible = "oxsemi,ox820-dwmac",
+		.data = &ox820_dwmac_data,
+	},
+	{ }
+};
+MODULE_DEVICE_TABLE(of, oxnas_dwmac_match);
+
+static struct platform_driver oxnas_dwmac_driver = {
+	.probe  = oxnas_dwmac_probe,
+	.remove = stmmac_pltfr_remove,
+	.driver = {
+		.name           = "oxnas-dwmac",
+		.pm		= &stmmac_pltfr_pm_ops,
+		.of_match_table = oxnas_dwmac_match,
+	},
+};
+module_platform_driver(oxnas_dwmac_driver);
+
+MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
+MODULE_DESCRIPTION("Oxford Semiconductor OXNAS DWMAC glue layer");
+MODULE_LICENSE("GPL v2");