1 files changed, 72 insertions, 0 deletions
diff --git a/drivers/net/ethernet/renesas/rcar_gen4_ptp.h b/drivers/net/ethernet/renesas/rcar_gen4_ptp.h
new file mode 100644
index 000000000000..b1bbea8d3a52
--- /dev/null
+++ b/drivers/net/ethernet/renesas/rcar_gen4_ptp.h
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Renesas R-Car Gen4 gPTP device driver
+ *
+ * Copyright (C) 2022 Renesas Electronics Corporation
+ */
+
+#ifndef __RCAR_GEN4_PTP_H__
+#define __RCAR_GEN4_PTP_H__
+
+#include <linux/ptp_clock_kernel.h>
+
+#define PTPTIVC_INIT			0x19000000	/* 320MHz */
+#define RCAR_GEN4_PTP_CLOCK_S4		PTPTIVC_INIT
+#define RCAR_GEN4_GPTP_OFFSET_S4	0x00018000
+
+/* for rcar_gen4_ptp_init */
+enum rcar_gen4_ptp_reg_layout {
+	RCAR_GEN4_PTP_REG_LAYOUT_S4
+};
+
+/* driver's definitions */
+#define RCAR_GEN4_RXTSTAMP_ENABLED		BIT(0)
+#define RCAR_GEN4_RXTSTAMP_TYPE_V2_L2_EVENT	BIT(1)
+#define RCAR_GEN4_RXTSTAMP_TYPE_ALL		(RCAR_GEN4_RXTSTAMP_TYPE_V2_L2_EVENT | BIT(2))
+#define RCAR_GEN4_RXTSTAMP_TYPE			RCAR_GEN4_RXTSTAMP_TYPE_ALL
+
+#define RCAR_GEN4_TXTSTAMP_ENABLED		BIT(0)
+
+#define PTPRO				0
+
+enum rcar_gen4_ptp_reg_s4 {
+	PTPTMEC		= PTPRO + 0x0010,
+	PTPTMDC		= PTPRO + 0x0014,
+	PTPTIVC0	= PTPRO + 0x0020,
+	PTPTOVC00	= PTPRO + 0x0030,
+	PTPTOVC10	= PTPRO + 0x0034,
+	PTPTOVC20	= PTPRO + 0x0038,
+	PTPGPTPTM00	= PTPRO + 0x0050,
+	PTPGPTPTM10	= PTPRO + 0x0054,
+	PTPGPTPTM20	= PTPRO + 0x0058,
+};
+
+struct rcar_gen4_ptp_reg_offset {
+	u16 enable;
+	u16 disable;
+	u16 increment;
+	u16 config_t0;
+	u16 config_t1;
+	u16 config_t2;
+	u16 monitor_t0;
+	u16 monitor_t1;
+	u16 monitor_t2;
+};
+
+struct rcar_gen4_ptp_private {
+	void __iomem *addr;
+	struct ptp_clock *clock;
+	struct ptp_clock_info info;
+	const struct rcar_gen4_ptp_reg_offset *offs;
+	spinlock_t lock;	/* For multiple registers access */
+	u32 tstamp_tx_ctrl;
+	u32 tstamp_rx_ctrl;
+	s64 default_addend;
+	bool initialized;
+};
+
+int rcar_gen4_ptp_register(struct rcar_gen4_ptp_private *ptp_priv,
+			   enum rcar_gen4_ptp_reg_layout layout, u32 clock);
+int rcar_gen4_ptp_unregister(struct rcar_gen4_ptp_private *ptp_priv);
+struct rcar_gen4_ptp_private *rcar_gen4_ptp_alloc(struct platform_device *pdev);
+
+#endif	/* #ifndef __RCAR_GEN4_PTP_H__ */