Message-Id: <20211208185449.16763-4-jbx6244@gmail.com>
Date:   Wed,  8 Dec 2021 19:54:48 +0100
From:   Johan Jonker <jbx6244@...il.com>
To:     heiko@...ech.de
Cc:     robh+dt@...nel.org, kishon@...com, vkoul@...nel.org,
        p.zabel@...gutronix.de, yifeng.zhao@...k-chips.com,
        kever.yang@...k-chips.com, cl@...k-chips.com,
        linux-phy@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [RFC PATCH v4 3/4] phy: rockchip: add naneng combo phy for RK3568

From: Yifeng Zhao <yifeng.zhao@...k-chips.com>

This patch implements a combo phy driver for Rockchip SoCs
with NaNeng IP block. This phy can be used as pcie-phy, usb3-phy,
sata-phy or sgmii-phy.

Signed-off-by: Yifeng Zhao <yifeng.zhao@...k-chips.com>
Signed-off-by: Johan Jonker <jbx6244@...il.com>
---

TEST COMPILED ONLY!
Driver not verified with hardware!
---

Changed V4:
  restyle
  add devm_reset_control_array_get()
  remove clk structure
  change refclk DT parse
  change dev_err message
  add dot to phrase
  add ext_refclk variable
  add enable_ssc variable
  rename rockchip_combphy_param_write
  remove param_read
  replace rockchip-naneng-combphy driver name
---
 drivers/phy/rockchip/Kconfig                  |   8 +
 drivers/phy/rockchip/Makefile                 |   1 +
 .../rockchip/phy-rockchip-naneng-combphy.c    | 608 ++++++++++++++++++
 3 files changed, 617 insertions(+)
 create mode 100644 drivers/phy/rockchip/phy-rockchip-naneng-combphy.c

diff --git a/drivers/phy/rockchip/Kconfig b/drivers/phy/rockchip/Kconfig
index e812adad7..9022e395c 100644
--- a/drivers/phy/rockchip/Kconfig
+++ b/drivers/phy/rockchip/Kconfig
@@ -66,6 +66,14 @@ config PHY_ROCKCHIP_INNO_DSIDPHY
 	  Enable this to support the Rockchip MIPI/LVDS/TTL PHY with
 	  Innosilicon IP block.
 
+config PHY_ROCKCHIP_NANENG_COMBO_PHY
+	tristate "Rockchip NANENG COMBO PHY Driver"
+	depends on ARCH_ROCKCHIP && OF
+	select GENERIC_PHY
+	help
+	  Enable this to support the Rockchip PCIe/USB3.0/SATA/QSGMII
+	  combo PHY with NaNeng IP block.
+
 config PHY_ROCKCHIP_PCIE
 	tristate "Rockchip PCIe PHY Driver"
 	depends on (ARCH_ROCKCHIP && OF) || COMPILE_TEST
diff --git a/drivers/phy/rockchip/Makefile b/drivers/phy/rockchip/Makefile
index f0eec212b..a5041efb5 100644
--- a/drivers/phy/rockchip/Makefile
+++ b/drivers/phy/rockchip/Makefile
@@ -6,6 +6,7 @@ obj-$(CONFIG_PHY_ROCKCHIP_INNO_CSIDPHY)	+= phy-rockchip-inno-csidphy.o
 obj-$(CONFIG_PHY_ROCKCHIP_INNO_DSIDPHY)	+= phy-rockchip-inno-dsidphy.o
 obj-$(CONFIG_PHY_ROCKCHIP_INNO_HDMI)	+= phy-rockchip-inno-hdmi.o
 obj-$(CONFIG_PHY_ROCKCHIP_INNO_USB2)	+= phy-rockchip-inno-usb2.o
+obj-$(CONFIG_PHY_ROCKCHIP_NANENG_COMBO_PHY)	+= phy-rockchip-naneng-combphy.o
 obj-$(CONFIG_PHY_ROCKCHIP_PCIE)		+= phy-rockchip-pcie.o
 obj-$(CONFIG_PHY_ROCKCHIP_TYPEC)	+= phy-rockchip-typec.o
 obj-$(CONFIG_PHY_ROCKCHIP_USB)		+= phy-rockchip-usb.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 000000000..56aaeed62
--- /dev/null
+++ b/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c
@@ -0,0 +1,608 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Rockchip PIPE USB3.0 PCIE SATA combphy driver
+ *
+ * Copyright (C) 2021 Rockchip Electronics Co., Ltd.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/phy/phy.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+#include <dt-bindings/phy/phy.h>
+
+#define BIT_WRITEABLE_SHIFT		16
+#define REF_CLOCK_24MHz			24000000
+#define REF_CLOCK_25MHz			25000000
+#define REF_CLOCK_100MHz		100000000
+/* RK3568 T22 COMBO PHY REG */
+#define RK3568_T22_PHYREG5		0x14
+#define T22_PHYREG5_PLL_DIV_MASK	GENMASK(7, 6)
+#define T22_PHYREG5_PLL_DIV_SHIFT	6
+#define T22_PHYREG5_PLL_DIV_2		1
+
+#define RK3568_T22_PHYREG6		0x18
+#define T22_PHYREG6_TX_RTERM_MASK	GENMASK(7, 4)
+#define T22_PHYREG6_TX_RTERM_SHIFT	4
+#define T22_PHYREG6_TX_RTERM_50OHM	0x8
+#define T22_PHYREG6_RX_RTERM_MASK	GENMASK(3, 0)
+#define T22_PHYREG6_RX_RTERM_SHIFT	0
+#define T22_PHYREG6_RX_RTERM_44OHM	0xF
+
+#define RK3568_T22_PHYREG7		0x1C
+#define T22_PHYREG7_SSC_EN		BIT(4)
+
+#define RK3568_T22_PHYREG10		0x28
+#define T22_PHYREG10_SU_TRIM_0_7	0xF0
+
+#define RK3568_T22_PHYREG11		0x2C
+#define T22_PHYREG11_PLL_LPF_ADJ	0x4
+
+#define RK3568_T22_PHYREG12		0x30
+#define T22_PHYREG12_RESISTER_MASK	GENMASK(5, 4)
+#define T22_PHYREG12_RESISTER_SHIFT	0x4
+#define T22_PHYREG12_RESISTER_HIGH_Z	0x3
+#define T22_PHYREG12_CKRCV_AMP0		BIT(7)
+
+#define RK3568_T22_PHYREG13		0x34
+#define T22_PHYREG13_CKRCV_AMP1		BIT(0)
+
+#define RK3568_T22_PHYREG14		0x38
+#define T22_PHYREG14_CTLE_EN		BIT(0)
+#define T22_PHYREG14_SSC_CNT_MASK	GENMASK(7, 6)
+#define T22_PHYREG14_SSC_CNT_SHIFT	6
+#define T22_PHYREG14_SSC_CNT_VALUE	0x1
+
+#define RK3568_T22_PHYREG15		0x3C
+#define T22_PHYREG15_SSC_CNT_VALUE	0x5f
+
+#define RK3568_T22_PHYREG17		0x44
+#define T22_PHYREG17_PLL_LOOP		0x32
+
+#define RK3568_T22_PHYREG31		0x7C
+#define T22_PHYREG31_SSC_MASK		GENMASK(7, 4)
+#define T22_PHYREG31_SSC_DIR_SHIFT	4
+#define T22_PHYREG31_SSC_UPWARD		0
+#define T22_PHYREG31_SSC_DOWNWARD	1
+#define T22_PHYREG31_SSC_OFFSET_SHIFT	6
+#define T22_PHYREG31_SSC_OFFSET_500PPM	1
+
+#define RK3568_T22_PHYREG32		0x80
+#define T22_PHYREG32_PLL_KVCO_MASK	GENMASK(4, 2)
+#define T22_PHYREG32_PLL_KVCO_SHIFT	2
+#define T22_PHYREG32_PLL_KVCO_VALUE	2
+
+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 {
+	u8 mode;
+	void __iomem *mmio;
+	int num_clks;
+	struct clk_bulk_data *clks;
+	struct device *dev;
+	struct regmap *pipe_grf;
+	struct regmap *phy_grf;
+	struct phy *phy;
+	struct reset_control *phy_rst;
+	const struct rockchip_combphy_cfg *cfg;
+	bool enable_ssc;
+	bool ext_refclk;
+	struct clk *refclk;
+};
+
+static int rockchip_combphy_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 u32 rockchip_combphy_is_ready(struct rockchip_combphy_priv *priv)
+{
+	const struct rockchip_combphy_grfcfg *cfg = priv->cfg->grfcfg;
+	u32 mask, val;
+
+	mask = GENMASK(cfg->pipe_phy_status.bitend,
+		       cfg->pipe_phy_status.bitstart);
+
+	regmap_read(priv->phy_grf, cfg->pipe_phy_status.offset, &val);
+	val = (val & mask) >> cfg->pipe_phy_status.bitstart;
+
+	return val;
+}
+
+static int rockchip_combphy_set_mode(struct rockchip_combphy_priv *priv)
+{
+	int ret = 0;
+
+	switch (priv->mode) {
+	case PHY_TYPE_PCIE:
+	case PHY_TYPE_USB3:
+	case PHY_TYPE_SATA:
+	case PHY_TYPE_SGMII:
+	case PHY_TYPE_QSGMII:
+		if (priv->cfg->combphy_cfg)
+			ret = priv->cfg->combphy_cfg(priv);
+		break;
+	default:
+		dev_err(priv->dev, "incompatible PHY type\n");
+		return -EINVAL;
+	}
+
+	if (ret)
+		dev_err(priv->dev, "failed to init phy for phy mode %x\n", priv->mode);
+
+	return ret;
+}
+
+static int rockchip_combphy_init(struct phy *phy)
+{
+	struct rockchip_combphy_priv *priv = phy_get_drvdata(phy);
+	const struct rockchip_combphy_grfcfg *cfg = priv->cfg->grfcfg;
+	u32 val;
+	int ret;
+
+	ret = clk_bulk_prepare_enable(priv->num_clks, priv->clks);
+	if (ret) {
+		dev_err(priv->dev, "failed to enable clks\n");
+		return ret;
+	}
+
+	ret = rockchip_combphy_set_mode(priv);
+	if (ret)
+		goto err_clk;
+
+	ret = reset_control_deassert(priv->phy_rst);
+	if (ret)
+		goto err_clk;
+
+	if (priv->mode == PHY_TYPE_USB3) {
+		ret = readx_poll_timeout_atomic(rockchip_combphy_is_ready,
+						priv, val,
+						val == cfg->pipe_phy_status.enable,
+						10, 1000);
+		if (ret)
+			dev_warn(priv->dev, "wait phy status ready timeout\n");
+	}
+
+	return 0;
+
+err_clk:
+	clk_bulk_disable_unprepare(priv->num_clks, priv->clks);
+
+	return ret;
+}
+
+static int rockchip_combphy_exit(struct phy *phy)
+{
+	struct rockchip_combphy_priv *priv = phy_get_drvdata(phy);
+
+	clk_bulk_disable_unprepare(priv->num_clks, priv->clks);
+	reset_control_assert(priv->phy_rst);
+
+	return 0;
+}
+
+static const struct phy_ops rochchip_combphy_ops = {
+	.init = rockchip_combphy_init,
+	.exit = rockchip_combphy_exit,
+	.owner = THIS_MODULE,
+};
+
+static struct phy *rockchip_combphy_xlate(struct device *dev, struct of_phandle_args *args)
+{
+	struct rockchip_combphy_priv *priv = dev_get_drvdata(dev);
+
+	if (args->args_count != 1) {
+		dev_err(dev, "invalid number of arguments\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	if (priv->mode != PHY_NONE && priv->mode != args->args[0])
+		dev_warn(dev, "phy type select %d overwriting type %d\n",
+			 args->args[0], priv->mode);
+
+	priv->mode = args->args[0];
+
+	return priv->phy;
+}
+
+static int rockchip_combphy_parse_dt(struct device *dev, struct rockchip_combphy_priv *priv)
+{
+	const struct rockchip_combphy_cfg *phy_cfg = priv->cfg;
+	int mac_id;
+	int i;
+
+	priv->num_clks = devm_clk_bulk_get_all(dev, &priv->clks);
+	if (priv->num_clks < 1)
+		return -EINVAL;
+
+	priv->refclk = NULL;
+	for (i = 0; i < priv->num_clks; i++) {
+		if (!strncmp(priv->clks[i].id, "ref", 3)) {
+			priv->refclk = priv->clks[i].clk;
+			break;
+		}
+	}
+
+	if (!priv->refclk) {
+		dev_err(dev, "no refclk found\n");
+		return -EINVAL;
+	}
+
+	priv->pipe_grf = syscon_regmap_lookup_by_phandle(dev->of_node, "rockchip,pipe-grf");
+	if (IS_ERR(priv->pipe_grf)) {
+		dev_err(dev, "failed to find peri_ctrl pipe-grf regmap\n");
+		return PTR_ERR(priv->pipe_grf);
+	}
+
+	priv->phy_grf = syscon_regmap_lookup_by_phandle(dev->of_node, "rockchip,pipe-phy-grf");
+	if (IS_ERR(priv->phy_grf)) {
+		dev_err(dev, "failed to find peri_ctrl pipe-phy-grf regmap\n");
+		return PTR_ERR(priv->phy_grf);
+	}
+
+	if (device_property_present(dev, "rockchip,dis-u3otg0-port"))
+		rockchip_combphy_param_write(priv->pipe_grf, &phy_cfg->grfcfg->u3otg0_port_en,
+					     false);
+
+	if (device_property_present(dev, "rockchip,dis-u3otg1-port"))
+		rockchip_combphy_param_write(priv->pipe_grf, &phy_cfg->grfcfg->u3otg1_port_en,
+					     false);
+
+	priv->enable_ssc = device_property_present(dev, "rockchip,enable-ssc");
+
+	priv->ext_refclk = device_property_present(dev, "rockchip,ext-refclk");
+
+	if (!device_property_read_u32(dev, "rockchip,sgmii-mac-sel", &mac_id) &&
+	    (mac_id > 0))
+		rockchip_combphy_param_write(priv->pipe_grf, &phy_cfg->grfcfg->pipe_sgmii_mac_sel,
+					     true);
+	else
+		rockchip_combphy_param_write(priv->pipe_grf, &phy_cfg->grfcfg->pipe_sgmii_mac_sel,
+					     false);
+
+	priv->phy_rst = devm_reset_control_array_get(dev, false, false);
+	if (IS_ERR(priv->phy_rst))
+		return dev_err_probe(dev, PTR_ERR(priv->phy_rst), "failed to get phy reset\n");
+
+	return 0;
+}
+
+static int rockchip_combphy_probe(struct platform_device *pdev)
+{
+	struct phy_provider *phy_provider;
+	struct device *dev = &pdev->dev;
+	struct rockchip_combphy_priv *priv;
+	const struct rockchip_combphy_cfg *phy_cfg;
+	struct resource *res;
+	int ret;
+
+	phy_cfg = of_device_get_match_data(dev);
+	if (!phy_cfg) {
+		dev_err(dev, "no OF match data provided\n");
+		return -EINVAL;
+	}
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->mmio = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
+	if (IS_ERR(priv->mmio)) {
+		ret = PTR_ERR(priv->mmio);
+		return ret;
+	}
+
+	priv->dev = dev;
+	priv->mode = PHY_NONE;
+	priv->cfg = phy_cfg;
+
+	ret = rockchip_combphy_parse_dt(dev, priv);
+	if (ret)
+		return ret;
+
+	ret = reset_control_assert(priv->phy_rst);
+	if (ret) {
+		dev_err(dev, "failed to reset phy\n");
+		return ret;
+	}
+
+	priv->phy = devm_phy_create(dev, NULL, &rochchip_combphy_ops);
+	if (IS_ERR(priv->phy)) {
+		dev_err(dev, "failed to create combphy\n");
+		return PTR_ERR(priv->phy);
+	}
+
+	dev_set_drvdata(dev, priv);
+	phy_set_drvdata(priv->phy, priv);
+
+	phy_provider = devm_of_phy_provider_register(dev, rockchip_combphy_xlate);
+
+	return PTR_ERR_OR_ZERO(phy_provider);
+}
+
+static int rk3568_combphy_cfg(struct rockchip_combphy_priv *priv)
+{
+	const struct rockchip_combphy_grfcfg *cfg = priv->cfg->grfcfg;
+	unsigned long rate;
+	u32 val;
+
+	switch (priv->mode) {
+	case PHY_TYPE_PCIE:
+		/* Set SSC downward spread spectrum. */
+		val = readl(priv->mmio + RK3568_T22_PHYREG31);
+		val &= ~T22_PHYREG31_SSC_MASK;
+		val |= T22_PHYREG31_SSC_DOWNWARD << T22_PHYREG31_SSC_DIR_SHIFT;
+		writel(val, priv->mmio + RK3568_T22_PHYREG31);
+
+		rockchip_combphy_param_write(priv->phy_grf, &cfg->con0_for_pcie, true);
+		rockchip_combphy_param_write(priv->phy_grf, &cfg->con1_for_pcie, true);
+		rockchip_combphy_param_write(priv->phy_grf, &cfg->con2_for_pcie, true);
+		rockchip_combphy_param_write(priv->phy_grf, &cfg->con3_for_pcie, true);
+		break;
+	case PHY_TYPE_USB3:
+		/* Set SSC downward spread spectrum. */
+		val = readl(priv->mmio + RK3568_T22_PHYREG31);
+		val &= ~T22_PHYREG31_SSC_MASK;
+		val |= T22_PHYREG31_SSC_DOWNWARD << T22_PHYREG31_SSC_DIR_SHIFT;
+		writel(val, priv->mmio + RK3568_T22_PHYREG31);
+
+		/* Enable adaptive CTLE for USB3.0 Rx. */
+		val = readl(priv->mmio + RK3568_T22_PHYREG14);
+		val |= T22_PHYREG14_CTLE_EN;
+		writel(val, priv->mmio + RK3568_T22_PHYREG14);
+
+		/* Set PLL KVCO fine tuning signals. */
+		val = readl(priv->mmio + RK3568_T22_PHYREG32);
+		val &= ~T22_PHYREG32_PLL_KVCO_MASK;
+		val |= T22_PHYREG32_PLL_KVCO_VALUE << T22_PHYREG32_PLL_KVCO_SHIFT;
+		writel(val, priv->mmio + RK3568_T22_PHYREG32);
+
+		/* Enable controlling random jitter. */
+		writel(T22_PHYREG11_PLL_LPF_ADJ, priv->mmio + RK3568_T22_PHYREG11);
+
+		/* Set PLL input clock divider 1/2. */
+		val = readl(priv->mmio + RK3568_T22_PHYREG5);
+		val &= ~T22_PHYREG5_PLL_DIV_MASK;
+		val |= T22_PHYREG5_PLL_DIV_2 << T22_PHYREG5_PLL_DIV_SHIFT;
+		writel(val, priv->mmio + RK3568_T22_PHYREG5);
+
+		writel(T22_PHYREG17_PLL_LOOP, priv->mmio + RK3568_T22_PHYREG17);
+		writel(T22_PHYREG10_SU_TRIM_0_7, priv->mmio + RK3568_T22_PHYREG10);
+
+		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_sel_usb, true);
+		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_txcomp_sel, false);
+		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_txelec_sel, false);
+		rockchip_combphy_param_write(priv->phy_grf, &cfg->usb_mode_set, true);
+		break;
+	case PHY_TYPE_SATA:
+		/* Enable adaptive CTLE for SATA Rx. */
+		val = readl(priv->mmio + RK3568_T22_PHYREG14);
+		val |= T22_PHYREG14_CTLE_EN;
+		writel(val, priv->mmio + RK3568_T22_PHYREG14);
+		/*
+		 * Set tx_rterm=50ohm and rx_rterm=44ohm for SATA.
+		 * 0: 60ohm, 8: 50ohm 15: 44ohm (by step abort 1ohm)
+		 */
+		val = T22_PHYREG6_TX_RTERM_50OHM << T22_PHYREG6_TX_RTERM_SHIFT;
+		val |= T22_PHYREG6_RX_RTERM_44OHM << T22_PHYREG6_RX_RTERM_SHIFT;
+		writel(val, priv->mmio + RK3568_T22_PHYREG6);
+
+		rockchip_combphy_param_write(priv->phy_grf, &cfg->con0_for_sata, true);
+		rockchip_combphy_param_write(priv->phy_grf, &cfg->con1_for_sata, true);
+		rockchip_combphy_param_write(priv->phy_grf, &cfg->con2_for_sata, true);
+		rockchip_combphy_param_write(priv->phy_grf, &cfg->con3_for_sata, true);
+		rockchip_combphy_param_write(priv->pipe_grf, &cfg->pipe_con0_for_sata, true);
+		break;
+	case PHY_TYPE_SGMII:
+		rockchip_combphy_param_write(priv->pipe_grf, &cfg->pipe_xpcs_phy_ready, true);
+		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_phymode_sel, true);
+		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_sel_qsgmii, true);
+		rockchip_combphy_param_write(priv->phy_grf, &cfg->sgmii_mode_set, true);
+		break;
+	case PHY_TYPE_QSGMII:
+		rockchip_combphy_param_write(priv->pipe_grf, &cfg->pipe_xpcs_phy_ready, true);
+		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_phymode_sel, true);
+		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_rate_sel, true);
+		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_sel_qsgmii, true);
+		rockchip_combphy_param_write(priv->phy_grf, &cfg->qsgmii_mode_set, true);
+		break;
+	default:
+		dev_err(priv->dev, "incompatible PHY type\n");
+		return -EINVAL;
+	}
+
+	rate = clk_get_rate(priv->refclk);
+
+	switch (rate) {
+	case REF_CLOCK_24MHz:
+		if (priv->mode == PHY_TYPE_USB3 || priv->mode == PHY_TYPE_SATA) {
+			/* Set ssc_cnt[9:0]=0101111101 & 31.5KHz. */
+			val = readl(priv->mmio + RK3568_T22_PHYREG14);
+			val &= ~T22_PHYREG14_SSC_CNT_MASK;
+			val |= T22_PHYREG14_SSC_CNT_VALUE << T22_PHYREG14_SSC_CNT_SHIFT;
+			writel(val, priv->mmio + RK3568_T22_PHYREG14);
+			writel(T22_PHYREG15_SSC_CNT_VALUE, priv->mmio + RK3568_T22_PHYREG15);
+		}
+		break;
+	case REF_CLOCK_25MHz:
+		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_clk_25m, true);
+		break;
+	case REF_CLOCK_100MHz:
+		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_clk_100m, true);
+		if (priv->mode == PHY_TYPE_PCIE) {
+			/* PLL KVCO  fine tuning. */
+			val = readl(priv->mmio + RK3568_T22_PHYREG32);
+			val &= ~T22_PHYREG32_PLL_KVCO_MASK;
+			val |= T22_PHYREG32_PLL_KVCO_VALUE << T22_PHYREG32_PLL_KVCO_SHIFT;
+			writel(val, priv->mmio + RK3568_T22_PHYREG32);
+
+			/* Enable controlling random jitter. */
+			writel(T22_PHYREG11_PLL_LPF_ADJ, priv->mmio + RK3568_T22_PHYREG11);
+
+			val = readl(priv->mmio + RK3568_T22_PHYREG5);
+			val &= ~T22_PHYREG5_PLL_DIV_MASK;
+			val |= T22_PHYREG5_PLL_DIV_2 << T22_PHYREG5_PLL_DIV_SHIFT;
+			writel(val, priv->mmio + RK3568_T22_PHYREG5);
+
+			writel(T22_PHYREG17_PLL_LOOP, priv->mmio + RK3568_T22_PHYREG17);
+			writel(T22_PHYREG10_SU_TRIM_0_7, priv->mmio + RK3568_T22_PHYREG10);
+		} else if (priv->mode == PHY_TYPE_SATA) {
+			/* downward spread spectrum +500ppm */
+			val = readl(priv->mmio + RK3568_T22_PHYREG31);
+			val &= ~T22_PHYREG31_SSC_MASK;
+			val |= T22_PHYREG31_SSC_DOWNWARD << T22_PHYREG31_SSC_DIR_SHIFT;
+			val |= T22_PHYREG31_SSC_OFFSET_500PPM << T22_PHYREG31_SSC_OFFSET_SHIFT;
+			writel(val, priv->mmio + RK3568_T22_PHYREG31);
+		}
+		break;
+	default:
+		dev_err(priv->dev, "unsupported rate: %lu\n", rate);
+		return -EINVAL;
+	}
+
+	if (priv->ext_refclk) {
+		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_clk_ext, true);
+		if (priv->mode == PHY_TYPE_PCIE && rate == REF_CLOCK_100MHz) {
+			val = readl(priv->mmio + RK3568_T22_PHYREG12);
+			val &= ~T22_PHYREG12_RESISTER_MASK;
+			val |= T22_PHYREG12_RESISTER_HIGH_Z << T22_PHYREG12_RESISTER_SHIFT;
+			val |= T22_PHYREG12_CKRCV_AMP0;
+			writel(val, priv->mmio + RK3568_T22_PHYREG12);
+
+			val = readl(priv->mmio + RK3568_T22_PHYREG13);
+			val |= T22_PHYREG13_CKRCV_AMP1;
+			writel(val, priv->mmio + RK3568_T22_PHYREG13);
+		}
+	}
+
+	if (priv->enable_ssc) {
+		val = readl(priv->mmio + RK3568_T22_PHYREG7);
+		val |= T22_PHYREG7_SSC_EN;
+		writel(val, priv->mmio + RK3568_T22_PHYREG7);
+	}
+
+	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 of_device_id rockchip_combphy_of_match[] = {
+	{
+		.compatible = "rockchip,rk3568-naneng-combphy",
+		.data = &rk3568_combphy_cfgs,
+	},
+	{ },
+};
+MODULE_DEVICE_TABLE(of, rockchip_combphy_of_match);
+
+static struct platform_driver rockchip_combphy_driver = {
+	.probe	= rockchip_combphy_probe,
+	.driver = {
+		.name = "rockchip-naneng-combphy",
+		.of_match_table = rockchip_combphy_of_match,
+	},
+};
+module_platform_driver(rockchip_combphy_driver);
+
+MODULE_DESCRIPTION("Rockchip NANENG COMBPHY driver");
+MODULE_LICENSE("GPL v2");
-- 
2.20.1

Powered by blists - more mailing lists