[PATCH 7/8] phy: rockchip: naneng-combphy: Add support for RK3528

[Jonas Karlman]

From: Jianwei Zheng <jianwei.zheng at rock-chips.com>

Add support for the PCIe/USB3 combo PHY used in the RK3528 SoC.

Config values are taken from vendor U-Boot linux-6.1-stan-rkr5 tag.

Signed-off-by: Jianwei Zheng <jianwei.zheng at rock-chips.com>
Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
---
 .../rockchip/phy-rockchip-naneng-combphy.c    | 102 ++++++++++++++++++
 1 file changed, 102 insertions(+)

diff --git a/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c b/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c
index 81195de60bc6..432a8f8e03a0 100644
--- a/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c
+++ b/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c
@@ -37,6 +37,7 @@ struct rockchip_combphy_grfcfg {
 	struct combphy_reg pipe_rxterm_set;
 	struct combphy_reg pipe_txelec_set;
 	struct combphy_reg pipe_txcomp_set;
+	struct combphy_reg pipe_clk_24m;
 	struct combphy_reg pipe_clk_25m;
 	struct combphy_reg pipe_clk_100m;
 	struct combphy_reg pipe_phymode_sel;
@@ -245,6 +246,103 @@ static int rockchip_combphy_probe(struct udevice *udev)
 	return rockchip_combphy_parse_dt(udev, priv);
 }
 
+static int rk3528_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 + 0x18);
+		val &= ~GENMASK(5, 4);
+		val |= 0x01 << 4;
+		writel(val, priv->mmio + 0x18);
+
+		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 + 0x18);
+		val &= ~GENMASK(5, 4);
+		val |= 0x01 << 4;
+		writel(val, priv->mmio + 0x18);
+
+		/* Enable adaptive CTLE for USB3.0 Rx */
+		val = readl(priv->mmio + 0x200);
+		val &= ~GENMASK(17, 17);
+		val |= 0x01 << 17;
+		writel(val, priv->mmio + 0x200);
+
+		/* Set Rx squelch input filler bandwidth */
+		val = readl(priv->mmio + 0x20c);
+		val &= ~GENMASK(2, 0);
+		val |= 0x06;
+		writel(val, priv->mmio + 0x20c);
+
+		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);
+		param_write(priv->pipe_grf, &cfg->u3otg0_port_en, true);
+		break;
+	default:
+		dev_err(priv->dev, "incompatible PHY type\n");
+		return -EINVAL;
+	}
+
+	param_write(priv->phy_grf, &cfg->pipe_clk_100m, true);
+
+	if (priv->mode == PHY_TYPE_PCIE) {
+		/* PLL KVCO tuning fine */
+		val = readl(priv->mmio + 0x18);
+		val &= ~(0x7 << 10);
+		val |= 0x2 << 10;
+		writel(val, priv->mmio + 0x18);
+
+		/* su_trim[6:4]=111, [10:7]=1001, [2:0]=000 */
+		val = readl(priv->mmio + 0x108);
+		val &= ~(0x7f7);
+		val |= 0x4f0;
+		writel(val, priv->mmio + 0x108);
+	}
+
+	return 0;
+}
+
+static const struct rockchip_combphy_grfcfg rk3528_combphy_grfcfgs = {
+	/* pipe-phy-grf */
+	.pcie_mode_set		= { 0x0000, 5, 0, 0x00, 0x11 },
+	.usb_mode_set		= { 0x0000, 5, 0, 0x00, 0x04 },
+	.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_24m		= { 0x0004, 14, 13, 0x00, 0x00 },
+	.pipe_clk_100m		= { 0x0004, 14, 13, 0x00, 0x02 },
+	.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_phy_status	= { 0x0034, 6, 6, 0x01, 0x00 },
+	.con0_for_pcie		= { 0x0000, 15, 0, 0x00, 0x110 },
+	.con1_for_pcie		= { 0x0004, 15, 0, 0x00, 0x00 },
+	.con2_for_pcie		= { 0x0008, 15, 0, 0x00, 0x101 },
+	.con3_for_pcie		= { 0x000c, 15, 0, 0x00, 0x0200 },
+	/* pipe-grf */
+	.u3otg0_port_en		= { 0x0044, 15, 0, 0x0181, 0x1100 },
+};
+
+static const struct rockchip_combphy_cfg rk3528_combphy_cfgs = {
+	.num_phys = 1,
+	.phy_ids = {
+		0xffdc0000,
+	},
+	.grfcfg		= &rk3528_combphy_grfcfgs,
+	.combphy_cfg	= rk3528_combphy_cfg,
+};
+
 static int rk3568_combphy_cfg(struct rockchip_combphy_priv *priv)
 {
 	const struct rockchip_combphy_grfcfg *cfg = priv->cfg->grfcfg;
@@ -503,6 +601,10 @@ static const struct rockchip_combphy_cfg rk3588_combphy_cfgs = {
 };
 
 static const struct udevice_id rockchip_combphy_ids[] = {
+	{
+		.compatible = "rockchip,rk3528-naneng-combphy",
+		.data = (ulong)&rk3528_combphy_cfgs
+	},
 	{
 		.compatible = "rockchip,rk3568-naneng-combphy",
 		.data = (ulong)&rk3568_combphy_cfgs
-- 
2.50.1