1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * PTP 1588 clock using the IXP46X
4  *
5  * Copyright (C) 2010 OMICRON electronics GmbH
6  */
7 
8 #ifndef _IXP46X_TS_H_
9 #define _IXP46X_TS_H_
10 
11 #define DEFAULT_ADDEND 0xF0000029
12 #define TICKS_NS_SHIFT 4
13 
14 struct ixp46x_channel_ctl {
15 	u32 ch_control;  /* 0x40 Time Synchronization Channel Control */
16 	u32 ch_event;    /* 0x44 Time Synchronization Channel Event */
17 	u32 tx_snap_lo;  /* 0x48 Transmit Snapshot Low Register */
18 	u32 tx_snap_hi;  /* 0x4C Transmit Snapshot High Register */
19 	u32 rx_snap_lo;  /* 0x50 Receive Snapshot Low Register */
20 	u32 rx_snap_hi;  /* 0x54 Receive Snapshot High Register */
21 	u32 src_uuid_lo; /* 0x58 Source UUID0 Low Register */
22 	u32 src_uuid_hi; /* 0x5C Sequence Identifier/Source UUID0 High */
23 };
24 
25 struct ixp46x_ts_regs {
26 	u32 control;     /* 0x00 Time Sync Control Register */
27 	u32 event;       /* 0x04 Time Sync Event Register */
28 	u32 addend;      /* 0x08 Time Sync Addend Register */
29 	u32 accum;       /* 0x0C Time Sync Accumulator Register */
30 	u32 test;        /* 0x10 Time Sync Test Register */
31 	u32 unused;      /* 0x14 */
32 	u32 rsystime_lo; /* 0x18 RawSystemTime_Low Register */
33 	u32 rsystime_hi; /* 0x1C RawSystemTime_High Register */
34 	u32 systime_lo;  /* 0x20 SystemTime_Low Register */
35 	u32 systime_hi;  /* 0x24 SystemTime_High Register */
36 	u32 trgt_lo;     /* 0x28 TargetTime_Low Register */
37 	u32 trgt_hi;     /* 0x2C TargetTime_High Register */
38 	u32 asms_lo;     /* 0x30 Auxiliary Slave Mode Snapshot Low  */
39 	u32 asms_hi;     /* 0x34 Auxiliary Slave Mode Snapshot High */
40 	u32 amms_lo;     /* 0x38 Auxiliary Master Mode Snapshot Low */
41 	u32 amms_hi;     /* 0x3C Auxiliary Master Mode Snapshot High */
42 
43 	struct ixp46x_channel_ctl channel[3];
44 };
45 
46 /* 0x00 Time Sync Control Register Bits */
47 #define TSCR_AMM (1<<3)
48 #define TSCR_ASM (1<<2)
49 #define TSCR_TTM (1<<1)
50 #define TSCR_RST (1<<0)
51 
52 /* 0x04 Time Sync Event Register Bits */
53 #define TSER_SNM (1<<3)
54 #define TSER_SNS (1<<2)
55 #define TTIPEND  (1<<1)
56 
57 /* 0x40 Time Synchronization Channel Control Register Bits */
58 #define MASTER_MODE   (1<<0)
59 #define TIMESTAMP_ALL (1<<1)
60 
61 /* 0x44 Time Synchronization Channel Event Register Bits */
62 #define TX_SNAPSHOT_LOCKED (1<<0)
63 #define RX_SNAPSHOT_LOCKED (1<<1)
64 
65 #if IS_ENABLED(CONFIG_PTP_1588_CLOCK_IXP46X)
66 int ixp46x_ptp_find(struct ixp46x_ts_regs *__iomem *regs, int *phc_index);
67 #else
ixp46x_ptp_find(struct ixp46x_ts_regs * __iomem * regs,int * phc_index)68 static inline int ixp46x_ptp_find(struct ixp46x_ts_regs *__iomem *regs, int *phc_index)
69 {
70 	*regs = NULL;
71 	*phc_index = -1;
72 
73 	return -ENODEV;
74 }
75 #endif
76 
77 #endif
78