drivers: phy: add naneng combphy for rk3568

RK3568 has three combo phys, and PCIe/USB3/SATA/QSGMII controllers
share one pipe interface for each combo phy, here is the diagram
of the complex connection.

+----------------+
|                |     +------+
| USB3 OTG CTRL0 |---->|      |
|                |     |      |     +------------+
+----------------+     | PIPE |     |            |
                       | MUX  |---->| Combo PHY0 |
+----------------+     |      |     |            |
|                |     |      |     +------------+
|   SATA CTRL0   |---->|      |
|                |     +------+
+----------------+

+----------------+
|                |     +------+
| USB3 HOST CTRL1|---->|      |
|                |     |      |     +------------+
+----------------+     | PIPE |     |            |
                       | MUX  |---->| Combo PHY1 |
+----------------+     |      |     |            |
|                |---->|      |     +------------+
|   SATA CTRL1   |  -->|      |
|                |  |  +------+
+----------------+  |
                    |
+----------------+  |
|                |  |  +------+
|  QSGMII CTRL   |---->|      |
|                |     |      |     +------------+
+----------------+     | PIPE |     |            |
                       | MUX  |---->| Combo PHY2 |
+----------------+     |      |     |            |
|                |---->|      |     +------------+
|   SATA CTRL2   |  -->|      |
|                |  |  +------+
+----------------+  |
                    |
+----------------+  |
|                |  |
|  PCIe2 1-Lane  |---
|                |
+----------------+

Co-developed-by: Manoj Sai <abbaraju.manojsai@amarulasolutions.com>
Signed-off-by: Manoj Sai <abbaraju.manojsai@amarulasolutions.com>
Co-developed-by: Yifeng Zhao <yifeng.zhao@rock-chips.com>
Signed-off-by: Yifeng Zhao <yifeng.zhao@rock-chips.com>
Signed-off-by: Jagan Teki <jagan@edgeble.ai>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>

3 files changed, 449 insertions, 0 deletions

diff --git a/drivers/phy/rockchip/Kconfig b/drivers/phy/rockchip/Kconfig
index e477a6cd9e9..13057639403 100644
--- a/drivers/phy/rockchip/Kconfig
+++ b/drivers/phy/rockchip/Kconfig
@@ -11,6 +11,13 @@ config PHY_ROCKCHIP_INNO_USB2
 	help
 	  Support for Rockchip USB2.0 PHY with Innosilicon IP block.
 
+config PHY_ROCKCHIP_NANENG_COMBOPHY
+	bool "Support Rockchip NANENG combo PHY Driver"
+	depends on ARCH_ROCKCHIP
+	select PHY
+	help
+	  Enable this to support the Rockchip NANENG combo PHY.
+
 config PHY_ROCKCHIP_PCIE
 	bool "Rockchip PCIe PHY Driver"
 	depends on ARCH_ROCKCHIP
diff --git a/drivers/phy/rockchip/Makefile b/drivers/phy/rockchip/Makefile
index f6ad3bf59ae..a236877234b 100644
--- a/drivers/phy/rockchip/Makefile
+++ b/drivers/phy/rockchip/Makefile
@@ -4,6 +4,7 @@
 #
 
 obj-$(CONFIG_PHY_ROCKCHIP_INNO_USB2)	+= phy-rockchip-inno-usb2.o
+obj-$(CONFIG_PHY_ROCKCHIP_NANENG_COMBOPHY) += phy-rockchip-naneng-combphy.o
 obj-$(CONFIG_PHY_ROCKCHIP_PCIE)		+= phy-rockchip-pcie.o
 obj-$(CONFIG_PHY_ROCKCHIP_SNPS_PCIE3)	+= phy-rockchip-snps-pcie3.o
 obj-$(CONFIG_PHY_ROCKCHIP_TYPEC)	+= phy-rockchip-typec.o
diff --git a/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c b/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c
new file mode 100644
index 00000000000..78da5fe7970
--- /dev/null
+++ b/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c
@@ -0,0 +1,441 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Rockchip USB3.0/PCIe Gen2/SATA/SGMII combphy driver
+ *
+ * Copyright (C) 2021 Rockchip Electronics Co., Ltd.
+ */
+
+#include <common.h>
+#include <clk.h>
+#include <dm.h>
+#include <dm/lists.h>
+#include <dt-bindings/phy/phy.h>
+#include <generic-phy.h>
+#include <syscon.h>
+#include <asm/io.h>
+#include <asm/arch-rockchip/clock.h>
+#include <regmap.h>
+#include <reset-uclass.h>
+#include <dm/device_compat.h>
+
+#define BIT_WRITEABLE_SHIFT		16
+
+struct rockchip_combphy_priv;
+
+struct combphy_reg {
+	u16 offset;
+	u16 bitend;
+	u16 bitstart;
+	u16 disable;
+	u16 enable;
+};
+
+struct rockchip_combphy_grfcfg {
+	struct combphy_reg pcie_mode_set;
+	struct combphy_reg usb_mode_set;
+	struct combphy_reg sgmii_mode_set;
+	struct combphy_reg qsgmii_mode_set;
+	struct combphy_reg pipe_rxterm_set;
+	struct combphy_reg pipe_txelec_set;
+	struct combphy_reg pipe_txcomp_set;
+	struct combphy_reg pipe_clk_25m;
+	struct combphy_reg pipe_clk_100m;
+	struct combphy_reg pipe_phymode_sel;
+	struct combphy_reg pipe_rate_sel;
+	struct combphy_reg pipe_rxterm_sel;
+	struct combphy_reg pipe_txelec_sel;
+	struct combphy_reg pipe_txcomp_sel;
+	struct combphy_reg pipe_clk_ext;
+	struct combphy_reg pipe_sel_usb;
+	struct combphy_reg pipe_sel_qsgmii;
+	struct combphy_reg pipe_phy_status;
+	struct combphy_reg con0_for_pcie;
+	struct combphy_reg con1_for_pcie;
+	struct combphy_reg con2_for_pcie;
+	struct combphy_reg con3_for_pcie;
+	struct combphy_reg con0_for_sata;
+	struct combphy_reg con1_for_sata;
+	struct combphy_reg con2_for_sata;
+	struct combphy_reg con3_for_sata;
+	struct combphy_reg pipe_con0_for_sata;
+	struct combphy_reg pipe_sgmii_mac_sel;
+	struct combphy_reg pipe_xpcs_phy_ready;
+	struct combphy_reg u3otg0_port_en;
+	struct combphy_reg u3otg1_port_en;
+};
+
+struct rockchip_combphy_cfg {
+	const struct rockchip_combphy_grfcfg *grfcfg;
+	int (*combphy_cfg)(struct rockchip_combphy_priv *priv);
+};
+
+struct rockchip_combphy_priv {
+	u32 mode;
+	void __iomem *mmio;
+	struct udevice *dev;
+	struct regmap *pipe_grf;
+	struct regmap *phy_grf;
+	struct phy *phy;
+	struct reset_ctl phy_rst;
+	struct clk ref_clk;
+	const struct rockchip_combphy_cfg *cfg;
+};
+
+static int param_write(struct regmap *base,
+		       const struct combphy_reg *reg, bool en)
+{
+	u32 val, mask, tmp;
+
+	tmp = en ? reg->enable : reg->disable;
+	mask = GENMASK(reg->bitend, reg->bitstart);
+	val = (tmp << reg->bitstart) | (mask << BIT_WRITEABLE_SHIFT);
+
+	return regmap_write(base, reg->offset, val);
+}
+
+static int rockchip_combphy_pcie_init(struct rockchip_combphy_priv *priv)
+{
+	int ret = 0;
+
+	if (priv->cfg->combphy_cfg) {
+		ret = priv->cfg->combphy_cfg(priv);
+		if (ret) {
+			dev_err(priv->dev, "failed to init phy for pcie\n");
+			return ret;
+		}
+	}
+
+	return ret;
+}
+
+static int rockchip_combphy_usb3_init(struct rockchip_combphy_priv *priv)
+{
+	int ret = 0;
+
+	if (priv->cfg->combphy_cfg) {
+		ret = priv->cfg->combphy_cfg(priv);
+		if (ret) {
+			dev_err(priv->dev, "failed to init phy for usb3\n");
+			return ret;
+		}
+	}
+
+	return ret;
+}
+
+static int rockchip_combphy_sata_init(struct rockchip_combphy_priv *priv)
+{
+	int ret = 0;
+
+	if (priv->cfg->combphy_cfg) {
+		ret = priv->cfg->combphy_cfg(priv);
+		if (ret) {
+			dev_err(priv->dev, "failed to init phy for sata\n");
+			return ret;
+		}
+	}
+
+	return ret;
+}
+
+static int rockchip_combphy_sgmii_init(struct rockchip_combphy_priv *priv)
+{
+	int ret = 0;
+
+	if (priv->cfg->combphy_cfg) {
+		ret = priv->cfg->combphy_cfg(priv);
+		if (ret) {
+			dev_err(priv->dev, "failed to init phy for sgmii\n");
+			return ret;
+		}
+	}
+
+	return ret;
+}
+
+static int rockchip_combphy_set_mode(struct rockchip_combphy_priv *priv)
+{
+	switch (priv->mode) {
+	case PHY_TYPE_PCIE:
+		rockchip_combphy_pcie_init(priv);
+		break;
+	case PHY_TYPE_USB3:
+		rockchip_combphy_usb3_init(priv);
+		break;
+	case PHY_TYPE_SATA:
+		rockchip_combphy_sata_init(priv);
+		break;
+	case PHY_TYPE_SGMII:
+	case PHY_TYPE_QSGMII:
+		return rockchip_combphy_sgmii_init(priv);
+	default:
+		dev_err(priv->dev, "incompatible PHY type\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int rockchip_combphy_init(struct phy *phy)
+{
+	struct rockchip_combphy_priv *priv = dev_get_priv(phy->dev);
+	int ret;
+
+	ret = clk_enable(&priv->ref_clk);
+	if (ret < 0 && ret != -ENOSYS)
+		return ret;
+
+	ret = rockchip_combphy_set_mode(priv);
+	if (ret)
+		goto err_clk;
+
+	reset_deassert(&priv->phy_rst);
+
+	return 0;
+
+err_clk:
+	clk_disable(&priv->ref_clk);
+
+	return ret;
+}
+
+static int rockchip_combphy_exit(struct phy *phy)
+{
+	struct rockchip_combphy_priv *priv = dev_get_priv(phy->dev);
+
+	clk_disable(&priv->ref_clk);
+	reset_assert(&priv->phy_rst);
+
+	return 0;
+}
+
+static int rockchip_combphy_xlate(struct phy *phy, struct ofnode_phandle_args *args)
+{
+	struct rockchip_combphy_priv *priv = dev_get_priv(phy->dev);
+
+	if (args->args_count != 1) {
+		pr_err("invalid number of arguments\n");
+		return -EINVAL;
+	}
+
+	priv->mode = args->args[0];
+
+	return 0;
+}
+
+static const struct phy_ops rochchip_combphy_ops = {
+	.init = rockchip_combphy_init,
+	.exit = rockchip_combphy_exit,
+	.of_xlate = rockchip_combphy_xlate,
+};
+
+static int rockchip_combphy_parse_dt(struct udevice *dev,
+				     struct rockchip_combphy_priv *priv)
+{
+	struct udevice *syscon;
+	int ret;
+
+	ret = uclass_get_device_by_phandle(UCLASS_SYSCON, dev, "rockchip,pipe-grf", &syscon);
+	if (ret) {
+		dev_err(dev, "failed to find peri_ctrl pipe-grf regmap");
+		return ret;
+	}
+	priv->pipe_grf = syscon_get_regmap(syscon);
+
+	ret = uclass_get_device_by_phandle(UCLASS_SYSCON, dev, "rockchip,pipe-phy-grf", &syscon);
+	if (ret) {
+		dev_err(dev, "failed to find peri_ctrl pipe-phy-grf regmap\n");
+		return ret;
+	}
+	priv->phy_grf = syscon_get_regmap(syscon);
+
+	ret = clk_get_by_index(dev, 0, &priv->ref_clk);
+	if (ret) {
+		dev_err(dev, "failed to find ref clock\n");
+		return PTR_ERR(&priv->ref_clk);
+	}
+
+	ret = reset_get_by_index(dev, 0, &priv->phy_rst);
+	if (ret) {
+		dev_err(dev, "no phy reset control specified\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int rockchip_combphy_probe(struct udevice *udev)
+{
+	struct rockchip_combphy_priv *priv = dev_get_priv(udev);
+	const struct rockchip_combphy_cfg *phy_cfg;
+
+	priv->mmio = (void __iomem *)dev_read_addr(udev);
+	if (IS_ERR(priv->mmio))
+		return PTR_ERR(priv->mmio);
+
+	phy_cfg = (const struct rockchip_combphy_cfg *)dev_get_driver_data(udev);
+	if (!phy_cfg) {
+		dev_err(udev, "No OF match data provided\n");
+		return -EINVAL;
+	}
+
+	priv->dev = udev;
+	priv->mode = PHY_TYPE_SATA;
+	priv->cfg = phy_cfg;
+
+	return rockchip_combphy_parse_dt(udev, priv);
+}
+
+static int rk3568_combphy_cfg(struct rockchip_combphy_priv *priv)
+{
+	const struct rockchip_combphy_grfcfg *cfg = priv->cfg->grfcfg;
+	u32 val;
+
+	switch (priv->mode) {
+	case PHY_TYPE_PCIE:
+		/* Set SSC downward spread spectrum */
+		val = readl(priv->mmio + (0x1f << 2));
+		val &= ~GENMASK(5, 4);
+		val |= 0x01 << 4;
+		writel(val, priv->mmio + 0x7c);
+
+		param_write(priv->phy_grf, &cfg->con0_for_pcie, true);
+		param_write(priv->phy_grf, &cfg->con1_for_pcie, true);
+		param_write(priv->phy_grf, &cfg->con2_for_pcie, true);
+		param_write(priv->phy_grf, &cfg->con3_for_pcie, true);
+		break;
+	case PHY_TYPE_USB3:
+		/* Set SSC downward spread spectrum */
+		val = readl(priv->mmio + (0x1f << 2));
+		val &= ~GENMASK(5, 4);
+		val |= 0x01 << 4;
+		writel(val, priv->mmio + 0x7c);
+
+		/* Enable adaptive CTLE for USB3.0 Rx */
+		val = readl(priv->mmio + (0x0e << 2));
+		val &= ~GENMASK(0, 0);
+		val |= 0x01;
+		writel(val, priv->mmio + (0x0e << 2));
+
+		/* Set PLL KVCO fine tuning signals */
+		val = readl(priv->mmio + (0x20 << 2));
+		val &= ~(0x7 << 2);
+		val |= 0x2 << 2;
+		writel(val, priv->mmio + (0x20 << 2));
+
+		/* Set PLL LPF R1 to su_trim[10:7]=1001 */
+		writel(0x4, priv->mmio + (0xb << 2));
+
+		/* Set PLL input clock divider 1/2 */
+		val = readl(priv->mmio + (0x5 << 2));
+		val &= ~(0x3 << 6);
+		val |= 0x1 << 6;
+		writel(val, priv->mmio + (0x5 << 2));
+
+		/* Set PLL loop divider */
+		writel(0x32, priv->mmio + (0x11 << 2));
+
+		/* Set PLL KVCO to min and set PLL charge pump current to max */
+		writel(0xf0, priv->mmio + (0xa << 2));
+
+		param_write(priv->phy_grf, &cfg->pipe_sel_usb, true);
+		param_write(priv->phy_grf, &cfg->pipe_txcomp_sel, false);
+		param_write(priv->phy_grf, &cfg->pipe_txelec_sel, false);
+		param_write(priv->phy_grf, &cfg->usb_mode_set, true);
+		break;
+	case PHY_TYPE_SATA:
+		writel(0x41, priv->mmio + 0x38);
+		writel(0x8F, priv->mmio + 0x18);
+		param_write(priv->phy_grf, &cfg->con0_for_sata, true);
+		param_write(priv->phy_grf, &cfg->con1_for_sata, true);
+		param_write(priv->phy_grf, &cfg->con2_for_sata, true);
+		param_write(priv->phy_grf, &cfg->con3_for_sata, true);
+		param_write(priv->pipe_grf, &cfg->pipe_con0_for_sata, true);
+		break;
+	case PHY_TYPE_SGMII:
+		param_write(priv->pipe_grf, &cfg->pipe_xpcs_phy_ready, true);
+		param_write(priv->phy_grf, &cfg->pipe_phymode_sel, true);
+		param_write(priv->phy_grf, &cfg->pipe_sel_qsgmii, true);
+		param_write(priv->phy_grf, &cfg->sgmii_mode_set, true);
+		break;
+	case PHY_TYPE_QSGMII:
+		param_write(priv->pipe_grf, &cfg->pipe_xpcs_phy_ready, true);
+		param_write(priv->phy_grf, &cfg->pipe_phymode_sel, true);
+		param_write(priv->phy_grf, &cfg->pipe_rate_sel, true);
+		param_write(priv->phy_grf, &cfg->pipe_sel_qsgmii, true);
+		param_write(priv->phy_grf, &cfg->qsgmii_mode_set, true);
+		break;
+	default:
+		pr_err("%s, phy-type %d\n", __func__, priv->mode);
+		return -EINVAL;
+	}
+
+	/* The default ref clock is 25Mhz */
+	param_write(priv->phy_grf, &cfg->pipe_clk_25m, true);
+
+	if (dev_read_bool(priv->dev, "rockchip,enable-ssc")) {
+		val = readl(priv->mmio + (0x7 << 2));
+		val |= BIT(4);
+		writel(val, priv->mmio + (0x7 << 2));
+	}
+
+	return 0;
+}
+
+static const struct rockchip_combphy_grfcfg rk3568_combphy_grfcfgs = {
+	/* pipe-phy-grf */
+	.pcie_mode_set		= { 0x0000, 5, 0, 0x00, 0x11 },
+	.usb_mode_set		= { 0x0000, 5, 0, 0x00, 0x04 },
+	.sgmii_mode_set		= { 0x0000, 5, 0, 0x00, 0x01 },
+	.qsgmii_mode_set	= { 0x0000, 5, 0, 0x00, 0x21 },
+	.pipe_rxterm_set	= { 0x0000, 12, 12, 0x00, 0x01 },
+	.pipe_txelec_set	= { 0x0004, 1, 1, 0x00, 0x01 },
+	.pipe_txcomp_set	= { 0x0004, 4, 4, 0x00, 0x01 },
+	.pipe_clk_25m		= { 0x0004, 14, 13, 0x00, 0x01 },
+	.pipe_clk_100m		= { 0x0004, 14, 13, 0x00, 0x02 },
+	.pipe_phymode_sel	= { 0x0008, 1, 1, 0x00, 0x01 },
+	.pipe_rate_sel		= { 0x0008, 2, 2, 0x00, 0x01 },
+	.pipe_rxterm_sel	= { 0x0008, 8, 8, 0x00, 0x01 },
+	.pipe_txelec_sel	= { 0x0008, 12, 12, 0x00, 0x01 },
+	.pipe_txcomp_sel	= { 0x0008, 15, 15, 0x00, 0x01 },
+	.pipe_clk_ext		= { 0x000c, 9, 8, 0x02, 0x01 },
+	.pipe_sel_usb		= { 0x000c, 14, 13, 0x00, 0x01 },
+	.pipe_sel_qsgmii	= { 0x000c, 15, 13, 0x00, 0x07 },
+	.pipe_phy_status	= { 0x0034, 6, 6, 0x01, 0x00 },
+	.con0_for_pcie		= { 0x0000, 15, 0, 0x00, 0x1000 },
+	.con1_for_pcie		= { 0x0004, 15, 0, 0x00, 0x0000 },
+	.con2_for_pcie		= { 0x0008, 15, 0, 0x00, 0x0101 },
+	.con3_for_pcie		= { 0x000c, 15, 0, 0x00, 0x0200 },
+	.con0_for_sata		= { 0x0000, 15, 0, 0x00, 0x0119 },
+	.con1_for_sata		= { 0x0004, 15, 0, 0x00, 0x0040 },
+	.con2_for_sata		= { 0x0008, 15, 0, 0x00, 0x80c3 },
+	.con3_for_sata		= { 0x000c, 15, 0, 0x00, 0x4407 },
+	/* pipe-grf */
+	.pipe_con0_for_sata	= { 0x0000, 15, 0, 0x00, 0x2220 },
+	.pipe_sgmii_mac_sel	= { 0x0040, 1, 1, 0x00, 0x01 },
+	.pipe_xpcs_phy_ready	= { 0x0040, 2, 2, 0x00, 0x01 },
+	.u3otg0_port_en		= { 0x0104, 15, 0, 0x0181, 0x1100 },
+	.u3otg1_port_en		= { 0x0144, 15, 0, 0x0181, 0x1100 },
+};
+
+static const struct rockchip_combphy_cfg rk3568_combphy_cfgs = {
+	.grfcfg		= &rk3568_combphy_grfcfgs,
+	.combphy_cfg	= rk3568_combphy_cfg,
+};
+
+static const struct udevice_id rockchip_combphy_ids[] = {
+	{
+		.compatible = "rockchip,rk3568-naneng-combphy",
+		.data = (ulong)&rk3568_combphy_cfgs
+	},
+	{ }
+};
+
+U_BOOT_DRIVER(rockchip_naneng_combphy) = {
+	.name		= "naneng-combphy",
+	.id		= UCLASS_PHY,
+	.of_match	= rockchip_combphy_ids,
+	.ops		= &rochchip_combphy_ops,
+	.probe		= rockchip_combphy_probe,
+	.priv_auto	= sizeof(struct rockchip_combphy_priv),
+};