linux-imx

/*

 * PTP 1588 clock using the EG20T PCH

 *

 * Copyright (C) 2010 OMICRON electronics GmbH

 * Copyright (C) 2011-2012 LAPIS SEMICONDUCTOR Co., LTD.

 *

 * This code was derived from the IXP46X driver.

 *

 * 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; version 2 of the License.

 *

 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.

 */

​

#include <linux/device.h>

#include <linux/err.h>

#include <linux/init.h>

#include <linux/interrupt.h>

#include <linux/io.h>

#include <linux/irq.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/pci.h>

#include <linux/ptp_clock_kernel.h>

#include <linux/slab.h>

​

#define STATION_ADDR_LEN    20

#define PCI_DEVICE_ID_PCH_1588  0x8819

#define IO_MEM_BAR 1

​

#define DEFAULT_ADDEND 0xA0000000

#define TICKS_NS_SHIFT  5

#define N_EXT_TS    2

​

enum pch_status {

    PCH_SUCCESS,

    PCH_INVALIDPARAM,

    PCH_NOTIMESTAMP,

    PCH_INTERRUPTMODEINUSE,

    PCH_FAILED,

    PCH_UNSUPPORTED,

};

/**

 * struct pch_ts_regs - IEEE 1588 registers

 */

struct pch_ts_regs {

    u32 control;

    u32 event;

    u32 addend;

    u32 accum;

    u32 test;

    u32 ts_compare;

    u32 rsystime_lo;

    u32 rsystime_hi;

    u32 systime_lo;