145 lines
5.0 KiB
C
145 lines
5.0 KiB
C
/*
|
|
* TI Common Platform Time Sync
|
|
*
|
|
* Copyright (C) 2012 Richard Cochran <richardcochran@gmail.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#ifndef _TI_CPTS_H_
|
|
#define _TI_CPTS_H_
|
|
|
|
#include <linux/clk.h>
|
|
#include <linux/clkdev.h>
|
|
#include <linux/clocksource.h>
|
|
#include <linux/device.h>
|
|
#include <linux/list.h>
|
|
#include <linux/ptp_clock_kernel.h>
|
|
#include <linux/skbuff.h>
|
|
|
|
struct cpsw_cpts {
|
|
u32 idver; /* Identification and version */
|
|
u32 control; /* Time sync control */
|
|
u32 res1;
|
|
u32 ts_push; /* Time stamp event push */
|
|
u32 ts_load_val; /* Time stamp load value */
|
|
u32 ts_load_en; /* Time stamp load enable */
|
|
u32 res2[2];
|
|
u32 intstat_raw; /* Time sync interrupt status raw */
|
|
u32 intstat_masked; /* Time sync interrupt status masked */
|
|
u32 int_enable; /* Time sync interrupt enable */
|
|
u32 res3;
|
|
u32 event_pop; /* Event interrupt pop */
|
|
u32 event_low; /* 32 Bit Event Time Stamp */
|
|
u32 event_high; /* Event Type Fields */
|
|
};
|
|
|
|
/* Bit definitions for the IDVER register */
|
|
#define TX_IDENT_SHIFT (16) /* TX Identification Value */
|
|
#define TX_IDENT_MASK (0xffff)
|
|
#define RTL_VER_SHIFT (11) /* RTL Version Value */
|
|
#define RTL_VER_MASK (0x1f)
|
|
#define MAJOR_VER_SHIFT (8) /* Major Version Value */
|
|
#define MAJOR_VER_MASK (0x7)
|
|
#define MINOR_VER_SHIFT (0) /* Minor Version Value */
|
|
#define MINOR_VER_MASK (0xff)
|
|
|
|
/* Bit definitions for the CONTROL register */
|
|
#define HW4_TS_PUSH_EN (1<<11) /* Hardware push 4 enable */
|
|
#define HW3_TS_PUSH_EN (1<<10) /* Hardware push 3 enable */
|
|
#define HW2_TS_PUSH_EN (1<<9) /* Hardware push 2 enable */
|
|
#define HW1_TS_PUSH_EN (1<<8) /* Hardware push 1 enable */
|
|
#define INT_TEST (1<<1) /* Interrupt Test */
|
|
#define CPTS_EN (1<<0) /* Time Sync Enable */
|
|
|
|
/*
|
|
* Definitions for the single bit resisters:
|
|
* TS_PUSH TS_LOAD_EN INTSTAT_RAW INTSTAT_MASKED INT_ENABLE EVENT_POP
|
|
*/
|
|
#define TS_PUSH (1<<0) /* Time stamp event push */
|
|
#define TS_LOAD_EN (1<<0) /* Time Stamp Load */
|
|
#define TS_PEND_RAW (1<<0) /* int read (before enable) */
|
|
#define TS_PEND (1<<0) /* masked interrupt read (after enable) */
|
|
#define TS_PEND_EN (1<<0) /* masked interrupt enable */
|
|
#define EVENT_POP (1<<0) /* writing discards one event */
|
|
|
|
/* Bit definitions for the EVENT_HIGH register */
|
|
#define PORT_NUMBER_SHIFT (24) /* Indicates Ethernet port or HW pin */
|
|
#define PORT_NUMBER_MASK (0x1f)
|
|
#define EVENT_TYPE_SHIFT (20) /* Time sync event type */
|
|
#define EVENT_TYPE_MASK (0xf)
|
|
#define MESSAGE_TYPE_SHIFT (16) /* PTP message type */
|
|
#define MESSAGE_TYPE_MASK (0xf)
|
|
#define SEQUENCE_ID_SHIFT (0) /* PTP message sequence ID */
|
|
#define SEQUENCE_ID_MASK (0xffff)
|
|
|
|
enum {
|
|
CPTS_EV_PUSH, /* Time Stamp Push Event */
|
|
CPTS_EV_ROLL, /* Time Stamp Rollover Event */
|
|
CPTS_EV_HALF, /* Time Stamp Half Rollover Event */
|
|
CPTS_EV_HW, /* Hardware Time Stamp Push Event */
|
|
CPTS_EV_RX, /* Ethernet Receive Event */
|
|
CPTS_EV_TX, /* Ethernet Transmit Event */
|
|
};
|
|
|
|
/* This covers any input clock up to about 500 MHz. */
|
|
#define CPTS_OVERFLOW_PERIOD (HZ * 8)
|
|
|
|
#define CPTS_FIFO_DEPTH 16
|
|
#define CPTS_MAX_EVENTS 32
|
|
|
|
struct cpts_event {
|
|
struct list_head list;
|
|
unsigned long tmo;
|
|
u32 high;
|
|
u32 low;
|
|
};
|
|
|
|
struct cpts {
|
|
struct cpsw_cpts __iomem *reg;
|
|
int tx_enable;
|
|
int rx_enable;
|
|
#ifdef CONFIG_TI_CPTS
|
|
struct ptp_clock_info info;
|
|
struct ptp_clock *clock;
|
|
spinlock_t lock; /* protects time registers */
|
|
u32 cc_mult; /* for the nominal frequency */
|
|
struct cyclecounter cc;
|
|
struct timecounter tc;
|
|
struct delayed_work overflow_work;
|
|
int phc_index;
|
|
struct clk *refclk;
|
|
struct list_head events;
|
|
struct list_head pool;
|
|
struct cpts_event pool_data[CPTS_MAX_EVENTS];
|
|
#endif
|
|
};
|
|
|
|
#ifdef CONFIG_TI_CPTS
|
|
void cpts_rx_timestamp(struct cpts *cpts, struct sk_buff *skb);
|
|
void cpts_tx_timestamp(struct cpts *cpts, struct sk_buff *skb);
|
|
#else
|
|
static inline void cpts_rx_timestamp(struct cpts *cpts, struct sk_buff *skb)
|
|
{
|
|
}
|
|
static inline void cpts_tx_timestamp(struct cpts *cpts, struct sk_buff *skb)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
int cpts_register(struct device *dev, struct cpts *cpts, u32 mult, u32 shift);
|
|
void cpts_unregister(struct cpts *cpts);
|
|
|
|
#endif
|