Adding upstream version 6.1.76.upstream/6.1.76

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

1 files changed, 255 insertions, 0 deletions

diff --git a/drivers/phy/amlogic/phy-meson-axg-mipi-pcie-analog.c b/drivers/phy/amlogic/phy-meson-axg-mipi-pcie-analog.c
new file mode 100644
index 000000000..a3e1108b7
--- /dev/null
+++ b/drivers/phy/amlogic/phy-meson-axg-mipi-pcie-analog.c
@@ -0,0 +1,255 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Amlogic AXG MIPI + PCIE analog PHY driver
+ *
+ * Copyright (C) 2019 Remi Pommarel <repk@triplefau.lt>
+ */
+#include <linux/bitfield.h>
+#include <linux/bitops.h>
+#include <linux/module.h>
+#include <linux/phy/phy.h>
+#include <linux/regmap.h>
+#include <linux/delay.h>
+#include <linux/mfd/syscon.h>
+#include <linux/platform_device.h>
+#include <dt-bindings/phy/phy.h>
+
+#define HHI_MIPI_CNTL0 0x00
+#define		HHI_MIPI_CNTL0_COMMON_BLOCK	GENMASK(31, 28)
+#define		HHI_MIPI_CNTL0_ENABLE		BIT(29)
+#define		HHI_MIPI_CNTL0_BANDGAP		BIT(26)
+#define		HHI_MIPI_CNTL0_DIF_REF_CTL1	GENMASK(25, 16)
+#define		HHI_MIPI_CNTL0_DIF_REF_CTL0	GENMASK(15, 0)
+
+#define HHI_MIPI_CNTL1 0x04
+#define		HHI_MIPI_CNTL1_CH0_CML_PDR_EN	BIT(12)
+#define		HHI_MIPI_CNTL1_LP_ABILITY	GENMASK(5, 4)
+#define		HHI_MIPI_CNTL1_LP_RESISTER	BIT(3)
+#define		HHI_MIPI_CNTL1_INPUT_SETTING	BIT(2)
+#define		HHI_MIPI_CNTL1_INPUT_SEL	BIT(1)
+#define		HHI_MIPI_CNTL1_PRBS7_EN		BIT(0)
+
+#define HHI_MIPI_CNTL2 0x08
+#define		HHI_MIPI_CNTL2_CH_PU		GENMASK(31, 25)
+#define		HHI_MIPI_CNTL2_CH_CTL		GENMASK(24, 19)
+#define		HHI_MIPI_CNTL2_CH0_DIGDR_EN	BIT(18)
+#define		HHI_MIPI_CNTL2_CH_DIGDR_EN	BIT(17)
+#define		HHI_MIPI_CNTL2_LPULPS_EN	BIT(16)
+#define		HHI_MIPI_CNTL2_CH_EN		GENMASK(15, 11)
+#define		HHI_MIPI_CNTL2_CH0_LP_CTL	GENMASK(10, 1)
+
+#define DSI_LANE_0              BIT(4)
+#define DSI_LANE_1              BIT(3)
+#define DSI_LANE_CLK            BIT(2)
+#define DSI_LANE_2              BIT(1)
+#define DSI_LANE_3              BIT(0)
+
+struct phy_axg_mipi_pcie_analog_priv {
+	struct phy *phy;
+	struct regmap *regmap;
+	bool dsi_configured;
+	bool dsi_enabled;
+	bool powered;
+	struct phy_configure_opts_mipi_dphy config;
+};
+
+static void phy_bandgap_enable(struct phy_axg_mipi_pcie_analog_priv *priv)
+{
+	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,
+			HHI_MIPI_CNTL0_BANDGAP, HHI_MIPI_CNTL0_BANDGAP);
+
+	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,
+			HHI_MIPI_CNTL0_ENABLE, HHI_MIPI_CNTL0_ENABLE);
+}
+
+static void phy_bandgap_disable(struct phy_axg_mipi_pcie_analog_priv *priv)
+{
+	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,
+			HHI_MIPI_CNTL0_BANDGAP, 0);
+	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,
+			HHI_MIPI_CNTL0_ENABLE, 0);
+}
+
+static void phy_dsi_analog_enable(struct phy_axg_mipi_pcie_analog_priv *priv)
+{
+	u32 reg;
+
+	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,
+			   HHI_MIPI_CNTL0_DIF_REF_CTL1,
+			   FIELD_PREP(HHI_MIPI_CNTL0_DIF_REF_CTL1, 0x1b8));
+	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,
+			   BIT(31), BIT(31));
+	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,
+			   HHI_MIPI_CNTL0_DIF_REF_CTL0,
+			   FIELD_PREP(HHI_MIPI_CNTL0_DIF_REF_CTL0, 0x8));
+
+	regmap_write(priv->regmap, HHI_MIPI_CNTL1, 0x001e);
+
+	regmap_write(priv->regmap, HHI_MIPI_CNTL2,
+		     (0x26e0 << 16) | (0x459 << 0));
+
+	reg = DSI_LANE_CLK;
+	switch (priv->config.lanes) {
+	case 4:
+		reg |= DSI_LANE_3;
+		fallthrough;
+	case 3:
+		reg |= DSI_LANE_2;
+		fallthrough;
+	case 2:
+		reg |= DSI_LANE_1;
+		fallthrough;
+	case 1:
+		reg |= DSI_LANE_0;
+		break;
+	default:
+		reg = 0;
+	}
+
+	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL2,
+			   HHI_MIPI_CNTL2_CH_EN,
+			   FIELD_PREP(HHI_MIPI_CNTL2_CH_EN, reg));
+
+	priv->dsi_enabled = true;
+}
+
+static void phy_dsi_analog_disable(struct phy_axg_mipi_pcie_analog_priv *priv)
+{
+	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,
+			HHI_MIPI_CNTL0_DIF_REF_CTL1,
+			FIELD_PREP(HHI_MIPI_CNTL0_DIF_REF_CTL1, 0));
+	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0, BIT(31), 0);
+	regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0,
+			HHI_MIPI_CNTL0_DIF_REF_CTL1, 0);
+
+	regmap_write(priv->regmap, HHI_MIPI_CNTL1, 0x6);
+
+	regmap_write(priv->regmap, HHI_MIPI_CNTL2, 0x00200000);
+
+	priv->dsi_enabled = false;
+}
+
+static int phy_axg_mipi_pcie_analog_configure(struct phy *phy,
+					      union phy_configure_opts *opts)
+{
+	struct phy_axg_mipi_pcie_analog_priv *priv = phy_get_drvdata(phy);
+	int ret;
+
+	ret = phy_mipi_dphy_config_validate(&opts->mipi_dphy);
+	if (ret)
+		return ret;
+
+	memcpy(&priv->config, opts, sizeof(priv->config));
+
+	priv->dsi_configured = true;
+
+	/* If PHY was already powered on, setup the DSI analog part */
+	if (priv->powered) {
+		/* If reconfiguring, disable & reconfigure */
+		if (priv->dsi_enabled)
+			phy_dsi_analog_disable(priv);
+
+		usleep_range(100, 200);
+
+		phy_dsi_analog_enable(priv);
+	}
+
+	return 0;
+}
+
+static int phy_axg_mipi_pcie_analog_power_on(struct phy *phy)
+{
+	struct phy_axg_mipi_pcie_analog_priv *priv = phy_get_drvdata(phy);
+
+	phy_bandgap_enable(priv);
+
+	if (priv->dsi_configured)
+		phy_dsi_analog_enable(priv);
+
+	priv->powered = true;
+
+	return 0;
+}
+
+static int phy_axg_mipi_pcie_analog_power_off(struct phy *phy)
+{
+	struct phy_axg_mipi_pcie_analog_priv *priv = phy_get_drvdata(phy);
+
+	phy_bandgap_disable(priv);
+
+	if (priv->dsi_enabled)
+		phy_dsi_analog_disable(priv);
+
+	priv->powered = false;
+
+	return 0;
+}
+
+static const struct phy_ops phy_axg_mipi_pcie_analog_ops = {
+	.configure = phy_axg_mipi_pcie_analog_configure,
+	.power_on = phy_axg_mipi_pcie_analog_power_on,
+	.power_off = phy_axg_mipi_pcie_analog_power_off,
+	.owner = THIS_MODULE,
+};
+
+static int phy_axg_mipi_pcie_analog_probe(struct platform_device *pdev)
+{
+	struct phy_provider *phy;
+	struct device *dev = &pdev->dev;
+	struct phy_axg_mipi_pcie_analog_priv *priv;
+	struct device_node *np = dev->of_node, *parent_np;
+	struct regmap *map;
+	int ret;
+
+	priv = devm_kmalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	/* Get the hhi system controller node */
+	parent_np = of_get_parent(dev->of_node);
+	map = syscon_node_to_regmap(parent_np);
+	of_node_put(parent_np);
+	if (IS_ERR(map)) {
+		dev_err(dev,
+			"failed to get HHI regmap\n");
+		return PTR_ERR(map);
+	}
+
+	priv->regmap = map;
+
+	priv->phy = devm_phy_create(dev, np, &phy_axg_mipi_pcie_analog_ops);
+	if (IS_ERR(priv->phy)) {
+		ret = PTR_ERR(priv->phy);
+		if (ret != -EPROBE_DEFER)
+			dev_err(dev, "failed to create PHY\n");
+		return ret;
+	}
+
+	phy_set_drvdata(priv->phy, priv);
+	dev_set_drvdata(dev, priv);
+
+	phy = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+
+	return PTR_ERR_OR_ZERO(phy);
+}
+
+static const struct of_device_id phy_axg_mipi_pcie_analog_of_match[] = {
+	{
+		.compatible = "amlogic,axg-mipi-pcie-analog-phy",
+	},
+	{ },
+};
+MODULE_DEVICE_TABLE(of, phy_axg_mipi_pcie_analog_of_match);
+
+static struct platform_driver phy_axg_mipi_pcie_analog_driver = {
+	.probe = phy_axg_mipi_pcie_analog_probe,
+	.driver = {
+		.name = "phy-axg-mipi-pcie-analog",
+		.of_match_table = phy_axg_mipi_pcie_analog_of_match,
+	},
+};
+module_platform_driver(phy_axg_mipi_pcie_analog_driver);
+
+MODULE_AUTHOR("Remi Pommarel <repk@triplefau.lt>");
+MODULE_DESCRIPTION("Amlogic AXG MIPI + PCIE analog PHY driver");
+MODULE_LICENSE("GPL v2");