From ba8ad7eece66ac5c579dd8de39efc72770e7cf64 Mon Sep 17 00:00:00 2001
From: Kever Yang <kever.yang@rock-chips.com>
Date: Wed, 6 Nov 2024 10:13:57 +0800
Subject: [PATCH] phy: rockchip-naneng-combo: add rk3576 support

Rockchip RK3576 integrates two naneng-combo PHY, PHY0 is used for
PCIE and SATA, PHY1 is used for PCIE, SATA and USB3.

This adds device specific data support.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Signed-off-by: William Wu <william.wu@rock-chips.com>
Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Test-by: Kever Yang <kever.yang@rock-chips.com>
Link: https://lore.kernel.org/r/20241106021357.19782-2-frawang.cn@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 .../rockchip/phy-rockchip-naneng-combphy.c    | 279 ++++++++++++++++++
 1 file changed, 279 insertions(+)

--- a/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c
+++ b/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c
@@ -37,6 +37,10 @@
 #define PHYREG8				0x1C
 #define PHYREG8_SSC_EN			BIT(4)
 
+#define PHYREG10			0x24
+#define PHYREG10_SSC_PCM_MASK		GENMASK(3, 0)
+#define PHYREG10_SSC_PCM_3500PPM	7
+
 #define PHYREG11			0x28
 #define PHYREG11_SU_TRIM_0_7		0xF0
 
@@ -61,17 +65,26 @@
 #define PHYREG16			0x3C
 #define PHYREG16_SSC_CNT_VALUE		0x5f
 
+#define PHYREG17			0x40
+
 #define PHYREG18			0x44
 #define PHYREG18_PLL_LOOP		0x32
 
+#define PHYREG21			0x50
+#define PHYREG21_RX_SQUELCH_VAL		0x0D
+
 #define PHYREG27			0x6C
 #define PHYREG27_RX_TRIM_RK3588		0x4C
 
+#define PHYREG30			0x74
+
 #define PHYREG32			0x7C
 #define PHYREG32_SSC_MASK		GENMASK(7, 4)
+#define PHYREG32_SSC_DIR_MASK		GENMASK(5, 4)
 #define PHYREG32_SSC_DIR_SHIFT		4
 #define PHYREG32_SSC_UPWARD		0
 #define PHYREG32_SSC_DOWNWARD		1
+#define PHYREG32_SSC_OFFSET_MASK	GENMASK(7, 6)
 #define PHYREG32_SSC_OFFSET_SHIFT	6
 #define PHYREG32_SSC_OFFSET_500PPM	1
 
@@ -79,6 +92,7 @@
 #define PHYREG33_PLL_KVCO_MASK		GENMASK(4, 2)
 #define PHYREG33_PLL_KVCO_SHIFT		2
 #define PHYREG33_PLL_KVCO_VALUE		2
+#define PHYREG33_PLL_KVCO_VALUE_RK3576	4
 
 struct rockchip_combphy_priv;
 
@@ -98,6 +112,7 @@ 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;
@@ -599,6 +614,266 @@ static const struct rockchip_combphy_cfg
 	.combphy_cfg	= rk3568_combphy_cfg,
 };
 
+static int rk3576_combphy_cfg(struct rockchip_combphy_priv *priv)
+{
+	const struct rockchip_combphy_grfcfg *cfg = priv->cfg->grfcfg;
+	unsigned long rate;
+	u32 val;
+
+	switch (priv->type) {
+	case PHY_TYPE_PCIE:
+		/* Set SSC downward spread spectrum */
+		val = FIELD_PREP(PHYREG32_SSC_MASK, PHYREG32_SSC_DOWNWARD);
+		rockchip_combphy_updatel(priv, PHYREG32_SSC_MASK, val, PHYREG32);
+
+		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 = FIELD_PREP(PHYREG32_SSC_MASK, PHYREG32_SSC_DOWNWARD);
+		rockchip_combphy_updatel(priv, PHYREG32_SSC_MASK, val, PHYREG32);
+
+		/* Enable adaptive CTLE for USB3.0 Rx */
+		val = readl(priv->mmio + PHYREG15);
+		val |= PHYREG15_CTLE_EN;
+		writel(val, priv->mmio + PHYREG15);
+
+		/* Set PLL KVCO fine tuning signals */
+		rockchip_combphy_updatel(priv, PHYREG33_PLL_KVCO_MASK, BIT(3), PHYREG33);
+
+		/* Set PLL LPF R1 to su_trim[10:7]=1001 */
+		writel(PHYREG12_PLL_LPF_ADJ_VALUE, priv->mmio + PHYREG12);
+
+		/* Set PLL input clock divider 1/2 */
+		val = FIELD_PREP(PHYREG6_PLL_DIV_MASK, PHYREG6_PLL_DIV_2);
+		rockchip_combphy_updatel(priv, PHYREG6_PLL_DIV_MASK, val, PHYREG6);
+
+		/* Set PLL loop divider */
+		writel(PHYREG18_PLL_LOOP, priv->mmio + PHYREG18);
+
+		/* Set PLL KVCO to min and set PLL charge pump current to max */
+		writel(PHYREG11_SU_TRIM_0_7, priv->mmio + PHYREG11);
+
+		/* Set Rx squelch input filler bandwidth */
+		writel(PHYREG21_RX_SQUELCH_VAL, priv->mmio + PHYREG21);
+
+		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 + PHYREG15);
+		val |= PHYREG15_CTLE_EN;
+		writel(val, priv->mmio + PHYREG15);
+
+		/* Set tx_rterm = 50 ohm and rx_rterm = 43.5 ohm */
+		val = PHYREG7_TX_RTERM_50OHM << PHYREG7_TX_RTERM_SHIFT;
+		val |= PHYREG7_RX_RTERM_44OHM << PHYREG7_RX_RTERM_SHIFT;
+		writel(val, priv->mmio + PHYREG7);
+
+		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);
+		rockchip_combphy_param_write(priv->pipe_grf, &cfg->pipe_con1_for_sata, 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:
+		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_clk_24m, true);
+		if (priv->type == PHY_TYPE_USB3 || priv->type == PHY_TYPE_SATA) {
+			/* Set ssc_cnt[9:0]=0101111101 & 31.5KHz */
+			val = FIELD_PREP(PHYREG15_SSC_CNT_MASK, PHYREG15_SSC_CNT_VALUE);
+			rockchip_combphy_updatel(priv, PHYREG15_SSC_CNT_MASK,
+						 val, PHYREG15);
+
+			writel(PHYREG16_SSC_CNT_VALUE, priv->mmio + PHYREG16);
+		} else if (priv->type == PHY_TYPE_PCIE) {
+			/* PLL KVCO tuning fine */
+			val = FIELD_PREP(PHYREG33_PLL_KVCO_MASK, PHYREG33_PLL_KVCO_VALUE_RK3576);
+			rockchip_combphy_updatel(priv, PHYREG33_PLL_KVCO_MASK,
+						 val, PHYREG33);
+
+			/* Set up rx_pck invert and rx msb to disable */
+			writel(0x00, priv->mmio + PHYREG27);
+
+			/*
+			 * Set up SU adjust signal:
+			 * su_trim[7:0],   PLL KVCO adjust bits[2:0] to min
+			 * su_trim[15:8],  PLL LPF R1 adujst bits[9:7]=3'b011
+			 * su_trim[31:24], CKDRV adjust
+			 */
+			writel(0x90, priv->mmio + PHYREG11);
+			writel(0x02, priv->mmio + PHYREG12);
+			writel(0x57, priv->mmio + PHYREG14);
+
+			writel(PHYREG16_SSC_CNT_VALUE, priv->mmio + PHYREG16);
+		}
+		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->type == PHY_TYPE_PCIE) {
+			/* gate_tx_pck_sel length select work for L1SS */
+			writel(0xc0, priv->mmio + PHYREG30);
+
+			/* PLL KVCO tuning fine */
+			val = FIELD_PREP(PHYREG33_PLL_KVCO_MASK, PHYREG33_PLL_KVCO_VALUE_RK3576);
+			rockchip_combphy_updatel(priv, PHYREG33_PLL_KVCO_MASK,
+						 val, PHYREG33);
+
+			/* Set up rx_trim: PLL LPF C1 85pf R1 1.25kohm */
+			writel(0x4c, priv->mmio + PHYREG27);
+
+			/*
+			 * Set up SU adjust signal:
+			 * su_trim[7:0],   PLL KVCO adjust bits[2:0] to min
+			 * su_trim[15:8],  bypass PLL loop divider code, and
+			 *                 PLL LPF R1 adujst bits[9:7]=3'b101
+			 * su_trim[23:16], CKRCV adjust
+			 * su_trim[31:24], CKDRV adjust
+			 */
+			writel(0x90, priv->mmio + PHYREG11);
+			writel(0x43, priv->mmio + PHYREG12);
+			writel(0x88, priv->mmio + PHYREG13);
+			writel(0x56, priv->mmio + PHYREG14);
+		} else if (priv->type == PHY_TYPE_SATA) {
+			/* downward spread spectrum +500ppm */
+			val = FIELD_PREP(PHYREG32_SSC_DIR_MASK, PHYREG32_SSC_DOWNWARD);
+			val |= FIELD_PREP(PHYREG32_SSC_OFFSET_MASK, PHYREG32_SSC_OFFSET_500PPM);
+			rockchip_combphy_updatel(priv, PHYREG32_SSC_MASK, val, PHYREG32);
+
+			/* ssc ppm adjust to 3500ppm */
+			rockchip_combphy_updatel(priv, PHYREG10_SSC_PCM_MASK,
+						 PHYREG10_SSC_PCM_3500PPM,
+						 PHYREG10);
+		}
+		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->type == PHY_TYPE_PCIE && rate == REF_CLOCK_100MHz) {
+			val = FIELD_PREP(PHYREG33_PLL_KVCO_MASK, PHYREG33_PLL_KVCO_VALUE_RK3576);
+			rockchip_combphy_updatel(priv, PHYREG33_PLL_KVCO_MASK,
+						 val, PHYREG33);
+
+			/* Set up rx_trim: PLL LPF C1 85pf R1 2.5kohm */
+			writel(0x0c, priv->mmio + PHYREG27);
+
+			/*
+			 * Set up SU adjust signal:
+			 * su_trim[7:0],   PLL KVCO adjust bits[2:0] to min
+			 * su_trim[15:8],  bypass PLL loop divider code, and
+			 *                 PLL LPF R1 adujst bits[9:7]=3'b101.
+			 * su_trim[23:16], CKRCV adjust
+			 * su_trim[31:24], CKDRV adjust
+			 */
+			writel(0x90, priv->mmio + PHYREG11);
+			writel(0x43, priv->mmio + PHYREG12);
+			writel(0x88, priv->mmio + PHYREG13);
+			writel(0x56, priv->mmio + PHYREG14);
+		}
+	}
+
+	if (priv->enable_ssc) {
+		val = readl(priv->mmio + PHYREG8);
+		val |= PHYREG8_SSC_EN;
+		writel(val, priv->mmio + PHYREG8);
+
+		if (priv->type == PHY_TYPE_PCIE && rate == REF_CLOCK_24MHz) {
+			/* Set PLL loop divider */
+			writel(0x00, priv->mmio + PHYREG17);
+			writel(PHYREG18_PLL_LOOP, priv->mmio + PHYREG18);
+
+			/* Set up rx_pck invert and rx msb to disable */
+			writel(0x00, priv->mmio + PHYREG27);
+
+			/*
+			 * Set up SU adjust signal:
+			 * su_trim[7:0],   PLL KVCO adjust bits[2:0] to min
+			 * su_trim[15:8],  PLL LPF R1 adujst bits[9:7]=3'b101
+			 * su_trim[23:16], CKRCV adjust
+			 * su_trim[31:24], CKDRV adjust
+			 */
+			writel(0x90, priv->mmio + PHYREG11);
+			writel(0x02, priv->mmio + PHYREG12);
+			writel(0x08, priv->mmio + PHYREG13);
+			writel(0x57, priv->mmio + PHYREG14);
+			writel(0x40, priv->mmio + PHYREG15);
+
+			writel(PHYREG16_SSC_CNT_VALUE, priv->mmio + PHYREG16);
+
+			val = FIELD_PREP(PHYREG33_PLL_KVCO_MASK, PHYREG33_PLL_KVCO_VALUE_RK3576);
+			writel(val, priv->mmio + PHYREG33);
+		}
+	}
+
+	return 0;
+}
+
+static const struct rockchip_combphy_grfcfg rk3576_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_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_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, 0x0129 },
+	.con1_for_sata		= { 0x0004, 15, 0, 0x00, 0x0000 },
+	.con2_for_sata		= { 0x0008, 15, 0, 0x00, 0x80c1 },
+	.con3_for_sata		= { 0x000c, 15, 0, 0x00, 0x0407 },
+	/* php-grf */
+	.pipe_con0_for_sata	= { 0x001C, 2, 0, 0x00, 0x2 },
+	.pipe_con1_for_sata	= { 0x0020, 2, 0, 0x00, 0x2 },
+};
+
+static const struct rockchip_combphy_cfg rk3576_combphy_cfgs = {
+	.num_phys = 2,
+	.phy_ids = {
+		0x2b050000,
+		0x2b060000
+	},
+	.grfcfg		= &rk3576_combphy_grfcfgs,
+	.combphy_cfg	= rk3576_combphy_cfg,
+};
+
 static int rk3588_combphy_cfg(struct rockchip_combphy_priv *priv)
 {
 	const struct rockchip_combphy_grfcfg *cfg = priv->cfg->grfcfg;
@@ -791,6 +1066,10 @@ static const struct of_device_id rockchi
 		.data = &rk3568_combphy_cfgs,
 	},
 	{
+		.compatible = "rockchip,rk3576-naneng-combphy",
+		.data = &rk3576_combphy_cfgs,
+	},
+	{
 		.compatible = "rockchip,rk3588-naneng-combphy",
 		.data = &rk3588_combphy_cfgs,
 	},
