phy: rockchip: add usbdp combo phy driver

This adds a new USBDP combo PHY with Samsung IP block driver.

The driver get lane mux and mapping info in 2 ways, supporting
DisplayPort alternate mode or parsing from DT. When parsing from DT,
the property "rockchip,dp-lane-mux" provide the DP mux and mapping info.

When do DP link training, need to set lane number, link rate, swing, and
pre-emphasis via PHY configure interface.

Change-Id: I84256746c28d98efcadff5998bfb35a28c959410
Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
Signed-off-by: Zhang Yubing <yubing.zhang@rock-chips.com>

drivers/phy/rockchip/Kconfig

@@ -157,3 +157,12 @@ config PHY_ROCKCHIP_USB
 	select GENERIC_PHY
 	help
 	  Enable this to support the Rockchip USB 2.0 PHY.
+
+config PHY_ROCKCHIP_USBDP
+	tristate "Rockchip USBDP COMBO PHY Driver"
+	depends on ARCH_ROCKCHIP && OF
+	select GENERIC_PHY
+	select TYPEC
+	help
+	  Enable this to support the Rockchip USB3.0/DP
+	  combo PHY with Samsung IP block.

drivers/phy/rockchip/Makefile

@@ -18,3 +18,4 @@ obj-$(CONFIG_PHY_ROCKCHIP_SAMSUNG_DCPHY)	+= phy-rockchip-samsung-dcphy.o
 obj-$(CONFIG_PHY_ROCKCHIP_SNPS_PCIE3)	+= phy-rockchip-snps-pcie3.o
 obj-$(CONFIG_PHY_ROCKCHIP_TYPEC)	+= phy-rockchip-typec.o
 obj-$(CONFIG_PHY_ROCKCHIP_USB)		+= phy-rockchip-usb.o
+obj-$(CONFIG_PHY_ROCKCHIP_USBDP)	+= phy-rockchip-usbdp.o

include/linux/phy/phy-rockchip-usbdp.h

@@ -0,0 +1,70 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Rockchip USBDP Combo PHY with Samsung IP block driver
+ *
+ * Copyright (C) 2021 Rockchip Electronics Co., Ltd
+ */
+
+#ifndef __PHY_ROCKCHIP_USBDP_H_
+#define __PHY_ROCKCHIP_USBDP_H_
+
+#include <linux/bits.h>
+
+/* RK3588 USBDP PHY Register Definitions */
+
+#define UDPHY_PCS				0x4000
+#define UDPHY_PMA				0x8000
+
+/* VO0 GRF Registers */
+#define RK3588_GRF_VO0_CON0			0x0000
+#define RK3588_GRF_VO0_CON2			0x0008
+#define DP_SINK_HPD_CFG				BIT(11)
+#define DP_SINK_HPD_SEL				BIT(10)
+#define DP_AUX_DIN_SEL				BIT(9)
+#define DP_AUX_DOUT_SEL				BIT(8)
+#define DP_LANE_SEL_N(n)			GENMASK(2 * (n) + 1, 2 * (n))
+#define DP_LANE_SEL_ALL				GENMASK(7, 0)
+#define PHY_AUX_DP_DATA_POL_NORMAL		0
+#define PHY_AUX_DP_DATA_POL_INVERT		1
+
+/* PMA CMN Registers */
+#define CMN_LANE_MUX_AND_EN_OFFSET		0x0288	/* cmn_reg00A2 */
+#define CMN_DP_LANE_MUX_N(n)			BIT((n) + 4)
+#define CMN_DP_LANE_EN_N(n)			BIT(n)
+#define CMN_DP_LANE_MUX_ALL			GENMASK(7, 4)
+#define CMN_DP_LANE_EN_ALL			GENMASK(3, 0)
+#define PHY_LANE_MUX_USB			0
+#define PHY_LANE_MUX_DP				1
+
+#define CMN_DP_LINK_OFFSET			0x28c	/*cmn_reg00A3 */
+#define CMN_DP_TX_LINK_BW			GENMASK(6, 5)
+#define CMN_DP_TX_LANE_SWAP_EN			BIT(2)
+
+#define CMN_SSC_EN_OFFSET			0x2d0	/* cmn_reg00B4 */
+#define CMN_ROPLL_SSC_EN			BIT(1)
+#define CMN_LCPLL_SSC_EN			BIT(0)
+
+#define CMN_ANA_LCPLL_DONE_OFFSET		0x0350	/* cmn_reg00D4 */
+#define CMN_ANA_LCPLL_LOCK_DONE			BIT(7)
+#define CMN_ANA_LCPLL_AFC_DONE			BIT(6)
+
+#define CMN_ANA_ROPLL_DONE_OFFSET		0x0354	/* cmn_reg00D5 */
+#define CMN_ANA_ROPLL_LOCK_DONE			BIT(1)
+#define CMN_ANA_ROPLL_AFC_DONE			BIT(0)
+
+#define CMN_DP_RSTN_OFFSET			0x038c	/* cmn_reg00E3 */
+#define CMN_DP_INIT_RSTN			BIT(3)
+#define CMN_DP_CMN_RSTN				BIT(2)
+#define CMN_CDR_WTCHDG_EN			BIT(1)
+#define CMN_CDR_WTCHDG_MSK_CDR_EN		BIT(0)
+
+#define TRSV_ANA_TX_CLK_OFFSET_N(n)		(0x854 + (n) * 0x800)	/* trsv_reg0215 */
+#define LN_ANA_TX_SER_TXCLK_INV			BIT(1)
+
+#define TRSV_LN0_MON_RX_CDR_DONE_OFFSET		0x0b84	/* trsv_reg02E1 */
+#define TRSV_LN0_MON_RX_CDR_LOCK_DONE		BIT(0)
+
+#define TRSV_LN2_MON_RX_CDR_DONE_OFFSET		0x1b84	/* trsv_reg06E1 */
+#define TRSV_LN2_MON_RX_CDR_LOCK_DONE		BIT(0)
+
+#endif