1/* SPDX-License-Identifier: GPL-2.0 */
2/* Renesas R-Car Gen4 gPTP device driver
3 *
4 * Copyright (C) 2022 Renesas Electronics Corporation
5 */
6
7#ifndef __RCAR_GEN4_PTP_H__
8#define __RCAR_GEN4_PTP_H__
9
10#include <linux/ptp_clock_kernel.h>
11
12#define RCAR_GEN4_GPTP_OFFSET_S4 0x00018000
13
14enum rcar_gen4_ptp_reg_layout {
15 RCAR_GEN4_PTP_REG_LAYOUT
16};
17
18/* driver's definitions */
19#define RCAR_GEN4_RXTSTAMP_ENABLED BIT(0)
20#define RCAR_GEN4_RXTSTAMP_TYPE_V2_L2_EVENT BIT(1)
21#define RCAR_GEN4_RXTSTAMP_TYPE_ALL (RCAR_GEN4_RXTSTAMP_TYPE_V2_L2_EVENT | BIT(2))
22#define RCAR_GEN4_RXTSTAMP_TYPE RCAR_GEN4_RXTSTAMP_TYPE_ALL
23
24#define RCAR_GEN4_TXTSTAMP_ENABLED BIT(0)
25
26#define PTPRO 0
27
28enum rcar_gen4_ptp_reg {
29 PTPTMEC = PTPRO + 0x0010,
30 PTPTMDC = PTPRO + 0x0014,
31 PTPTIVC0 = PTPRO + 0x0020,
32 PTPTOVC00 = PTPRO + 0x0030,
33 PTPTOVC10 = PTPRO + 0x0034,
34 PTPTOVC20 = PTPRO + 0x0038,
35 PTPGPTPTM00 = PTPRO + 0x0050,
36 PTPGPTPTM10 = PTPRO + 0x0054,
37 PTPGPTPTM20 = PTPRO + 0x0058,
38};
39
40struct rcar_gen4_ptp_reg_offset {
41 u16 enable;
42 u16 disable;
43 u16 increment;
44 u16 config_t0;
45 u16 config_t1;
46 u16 config_t2;
47 u16 monitor_t0;
48 u16 monitor_t1;
49 u16 monitor_t2;
50};
51
52struct rcar_gen4_ptp_private {
53 void __iomem *addr;
54 struct ptp_clock *clock;
55 struct ptp_clock_info info;
56 const struct rcar_gen4_ptp_reg_offset *offs;
57 spinlock_t lock; /* For multiple registers access */
58 u32 tstamp_tx_ctrl;
59 u32 tstamp_rx_ctrl;
60 s64 default_addend;
61 bool initialized;
62};
63
64int rcar_gen4_ptp_register(struct rcar_gen4_ptp_private *ptp_priv,
65 enum rcar_gen4_ptp_reg_layout layout, u32 rate);
66int rcar_gen4_ptp_unregister(struct rcar_gen4_ptp_private *ptp_priv);
67struct rcar_gen4_ptp_private *rcar_gen4_ptp_alloc(struct platform_device *pdev);
68
69#endif /* #ifndef __RCAR_GEN4_PTP_H__ */
70

source code of linux/drivers/net/ethernet/renesas/rcar_gen4_ptp.h