xref: /openbmc/linux/drivers/net/dsa/hirschmann/hellcreek_hwtstamp.h (revision 8be98d2f2a0a262f8bf8a0bc1fdf522b3c7aab17)
1  /* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
2  /*
3   * DSA driver for:
4   * Hirschmann Hellcreek TSN switch.
5   *
6   * Copyright (C) 2019,2020 Hochschule Offenburg
7   * Copyright (C) 2019,2020 Linutronix GmbH
8   * Authors: Kurt Kanzenbach <kurt@linutronix.de>
9   *	    Kamil Alkhouri <kamil.alkhouri@hs-offenburg.de>
10   */
11  
12  #ifndef _HELLCREEK_HWTSTAMP_H_
13  #define _HELLCREEK_HWTSTAMP_H_
14  
15  #include <net/dsa.h>
16  #include "hellcreek.h"
17  
18  /* Timestamp Register */
19  #define PR_TS_RX_P1_STATUS_C	(0x1d * 2)
20  #define PR_TS_RX_P1_DATA_C	(0x1e * 2)
21  #define PR_TS_TX_P1_STATUS_C	(0x1f * 2)
22  #define PR_TS_TX_P1_DATA_C	(0x20 * 2)
23  #define PR_TS_RX_P2_STATUS_C	(0x25 * 2)
24  #define PR_TS_RX_P2_DATA_C	(0x26 * 2)
25  #define PR_TS_TX_P2_STATUS_C	(0x27 * 2)
26  #define PR_TS_TX_P2_DATA_C	(0x28 * 2)
27  
28  #define PR_TS_STATUS_TS_AVAIL	BIT(2)
29  #define PR_TS_STATUS_TS_LOST	BIT(3)
30  
31  #define SKB_PTP_TYPE(__skb) (*(unsigned int *)((__skb)->cb))
32  
33  /* TX_TSTAMP_TIMEOUT: This limits the time spent polling for a TX
34   * timestamp. When working properly, hardware will produce a timestamp
35   * within 1ms. Software may enounter delays, so the timeout is set
36   * accordingly.
37   */
38  #define TX_TSTAMP_TIMEOUT	msecs_to_jiffies(40)
39  
40  int hellcreek_port_hwtstamp_set(struct dsa_switch *ds, int port,
41  				struct ifreq *ifr);
42  int hellcreek_port_hwtstamp_get(struct dsa_switch *ds, int port,
43  				struct ifreq *ifr);
44  
45  bool hellcreek_port_rxtstamp(struct dsa_switch *ds, int port,
46  			     struct sk_buff *clone, unsigned int type);
47  void hellcreek_port_txtstamp(struct dsa_switch *ds, int port,
48  			     struct sk_buff *skb);
49  
50  int hellcreek_get_ts_info(struct dsa_switch *ds, int port,
51  			  struct ethtool_ts_info *info);
52  
53  long hellcreek_hwtstamp_work(struct ptp_clock_info *ptp);
54  
55  int hellcreek_hwtstamp_setup(struct hellcreek *chip);
56  void hellcreek_hwtstamp_free(struct hellcreek *chip);
57  
58  #endif /* _HELLCREEK_HWTSTAMP_H_ */
59