[PATCH] fec: Unify fec_ptp.c and fec.c

[Fabio Estevam <festevam@gmail.com>]

From: Fabio Estevam <fabio.estevam@freescale.com>

Currently CONFIG_FEC=y generates two separate modules: fec_ptp.ko and fec.ko.

These modules cannot be used independently, so it is better to unify them.

Move fec_ptp.c code into fec.c and its definitions into fec.h.

Suggested-by: Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
---
 drivers/net/ethernet/freescale/Makefile  |    2 +-
 drivers/net/ethernet/freescale/fec.c     |  315 ++++++++++++++++++++++++
 drivers/net/ethernet/freescale/fec.h     |   23 ++
 drivers/net/ethernet/freescale/fec_ptp.c |  388 ------------------------------
 4 files changed, 339 insertions(+), 389 deletions(-)
 delete mode 100644 drivers/net/ethernet/freescale/fec_ptp.c

diff --git a/drivers/net/ethernet/freescale/Makefile b/drivers/net/ethernet/freescale/Makefile
index b7d58fe..3d1839a 100644
--- a/drivers/net/ethernet/freescale/Makefile
+++ b/drivers/net/ethernet/freescale/Makefile
@@ -2,7 +2,7 @@
 # Makefile for the Freescale network device drivers.
 #
 
-obj-$(CONFIG_FEC) += fec.o fec_ptp.o
+obj-$(CONFIG_FEC) += fec.o
 obj-$(CONFIG_FEC_MPC52xx) += fec_mpc52xx.o
 ifeq ($(CONFIG_FEC_MPC52xx_MDIO),y)
 	obj-$(CONFIG_FEC_MPC52xx) += fec_mpc52xx_phy.o
diff --git a/drivers/net/ethernet/freescale/fec.c b/drivers/net/ethernet/freescale/fec.c
index 8ca2cf6..d5bea99 100644
--- a/drivers/net/ethernet/freescale/fec.c
+++ b/drivers/net/ethernet/freescale/fec.c
@@ -1586,6 +1586,321 @@ static const struct net_device_ops fec_netdev_ops = {
 #endif
 };
 
+/**
+ * fec_ptp_read - read raw cycle counter (to be used by time counter)
+ * @cc: the cyclecounter structure
+ *
+ * this function reads the cyclecounter registers and is called by the
+ * cyclecounter structure used to construct a ns counter from the
+ * arbitrary fixed point registers
+ */
+static cycle_t fec_ptp_read(const struct cyclecounter *cc)
+{
+	struct fec_enet_private *fep =
+		container_of(cc, struct fec_enet_private, cc);
+	u32 tempval;
+
+	tempval = readl(fep->hwp + FEC_ATIME_CTRL);
+	tempval |= FEC_T_CTRL_CAPTURE;
+	writel(tempval, fep->hwp + FEC_ATIME_CTRL);
+
+	return readl(fep->hwp + FEC_ATIME);
+}
+
+/**
+ * fec_ptp_start_cyclecounter - create the cycle counter from hw
+ * @ndev: network device
+ *
+ * this function initializes the timecounter and cyclecounter
+ * structures for use in generated a ns counter from the arbitrary
+ * fixed point cycles registers in the hardware.
+ */
+void fec_ptp_start_cyclecounter(struct net_device *ndev)
+{
+	struct fec_enet_private *fep = netdev_priv(ndev);
+	unsigned long flags;
+	int inc;
+
+	inc = 1000000000 / fep->cycle_speed;
+
+	/* grab the ptp lock */
+	spin_lock_irqsave(&fep->tmreg_lock, flags);
+
+	/* 1ns counter */
+	writel(inc << FEC_T_INC_OFFSET, fep->hwp + FEC_ATIME_INC);
+
+	/* use free running count */
+	writel(0, fep->hwp + FEC_ATIME_EVT_PERIOD);
+
+	writel(FEC_T_CTRL_ENABLE, fep->hwp + FEC_ATIME_CTRL);
+
+	memset(&fep->cc, 0, sizeof(fep->cc));
+	fep->cc.read = fec_ptp_read;
+	fep->cc.mask = CLOCKSOURCE_MASK(32);
+	fep->cc.shift = 31;
+	fep->cc.mult = FEC_CC_MULT;
+
+	/* reset the ns time counter */
+	timecounter_init(&fep->tc, &fep->cc, ktime_to_ns(ktime_get_real()));
+
+	spin_unlock_irqrestore(&fep->tmreg_lock, flags);
+}
+
+/**
+ * fec_ptp_adjfreq - adjust ptp cycle frequency
+ * @ptp: the ptp clock structure
+ * @ppb: parts per billion adjustment from base
+ *
+ * Adjust the frequency of the ptp cycle counter by the
+ * indicated ppb from the base frequency.
+ *
+ * Because ENET hardware frequency adjust is complex,
+ * using software method to do that.
+ */
+static int fec_ptp_adjfreq(struct ptp_clock_info *ptp, s32 ppb)
+{
+	u64 diff;
+	unsigned long flags;
+	int neg_adj = 0;
+	u32 mult = FEC_CC_MULT;
+
+	struct fec_enet_private *fep =
+	    container_of(ptp, struct fec_enet_private, ptp_caps);
+
+	if (ppb < 0) {
+		ppb = -ppb;
+		neg_adj = 1;
+	}
+
+	diff = mult;
+	diff *= ppb;
+	diff = div_u64(diff, 1000000000ULL);
+
+	spin_lock_irqsave(&fep->tmreg_lock, flags);
+	/*
+	 * dummy read to set cycle_last in tc to now.
+	 * So use adjusted mult to calculate when next call
+	 * timercounter_read.
+	 */
+	timecounter_read(&fep->tc);
+
+	fep->cc.mult = neg_adj ? mult - diff : mult + diff;
+
+	spin_unlock_irqrestore(&fep->tmreg_lock, flags);
+
+	return 0;
+}
+
+/**
+ * fec_ptp_adjtime
+ * @ptp: the ptp clock structure
+ * @delta: offset to adjust the cycle counter by
+ *
+ * adjust the timer by resetting the timecounter structure.
+ */
+static int fec_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
+{
+	struct fec_enet_private *fep =
+	    container_of(ptp, struct fec_enet_private, ptp_caps);
+	unsigned long flags;
+	u64 now;
+
+	spin_lock_irqsave(&fep->tmreg_lock, flags);
+
+	now = timecounter_read(&fep->tc);
+	now += delta;
+
+	/* reset the timecounter */
+	timecounter_init(&fep->tc, &fep->cc, now);
+
+	spin_unlock_irqrestore(&fep->tmreg_lock, flags);
+
+	return 0;
+}
+
+/**
+ * fec_ptp_gettime
+ * @ptp: the ptp clock structure
+ * @ts: timespec structure to hold the current time value
+ *
+ * read the timecounter and return the correct value on ns,
+ * after converting it into a struct timespec.
+ */
+static int fec_ptp_gettime(struct ptp_clock_info *ptp, struct timespec *ts)
+{
+	struct fec_enet_private *adapter =
+	    container_of(ptp, struct fec_enet_private, ptp_caps);
+	u64 ns;
+	u32 remainder;
+	unsigned long flags;
+
+	spin_lock_irqsave(&adapter->tmreg_lock, flags);
+	ns = timecounter_read(&adapter->tc);
+	spin_unlock_irqrestore(&adapter->tmreg_lock, flags);
+
+	ts->tv_sec = div_u64_rem(ns, 1000000000ULL, &remainder);
+	ts->tv_nsec = remainder;
+
+	return 0;
+}
+
+/**
+ * fec_ptp_settime
+ * @ptp: the ptp clock structure
+ * @ts: the timespec containing the new time for the cycle counter
+ *
+ * reset the timecounter to use a new base value instead of the kernel
+ * wall timer value.
+ */
+static int fec_ptp_settime(struct ptp_clock_info *ptp,
+			   const struct timespec *ts)
+{
+	struct fec_enet_private *fep =
+	    container_of(ptp, struct fec_enet_private, ptp_caps);
+
+	u64 ns;
+	unsigned long flags;
+
+	ns = ts->tv_sec * 1000000000ULL;
+	ns += ts->tv_nsec;
+
+	spin_lock_irqsave(&fep->tmreg_lock, flags);
+	timecounter_init(&fep->tc, &fep->cc, ns);
+	spin_unlock_irqrestore(&fep->tmreg_lock, flags);
+	return 0;
+}
+
+/**
+ * fec_ptp_enable
+ * @ptp: the ptp clock structure
+ * @rq: the requested feature to change
+ * @on: whether to enable or disable the feature
+ *
+ */
+static int fec_ptp_enable(struct ptp_clock_info *ptp,
+			  struct ptp_clock_request *rq, int on)
+{
+	return -EOPNOTSUPP;
+}
+
+/**
+ * fec_ptp_hwtstamp_ioctl - control hardware time stamping
+ * @ndev: pointer to net_device
+ * @ifreq: ioctl data
+ * @cmd: particular ioctl requested
+ */
+int fec_ptp_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd)
+{
+	struct fec_enet_private *fep = netdev_priv(ndev);
+
+	struct hwtstamp_config config;
+
+	if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
+		return -EFAULT;
+
+	/* reserved for future extensions */
+	if (config.flags)
+		return -EINVAL;
+
+	switch (config.tx_type) {
+	case HWTSTAMP_TX_OFF:
+		fep->hwts_tx_en = 0;
+		break;
+	case HWTSTAMP_TX_ON:
+		fep->hwts_tx_en = 1;
+		break;
+	default:
+		return -ERANGE;
+	}
+
+	switch (config.rx_filter) {
+	case HWTSTAMP_FILTER_NONE:
+		if (fep->hwts_rx_en)
+			fep->hwts_rx_en = 0;
+		config.rx_filter = HWTSTAMP_FILTER_NONE;
+		break;
+
+	default:
+		/*
+		 * register RXMTRL must be set in order to do V1 packets,
+		 * therefore it is not possible to time stamp both V1 Sync and
+		 * Delay_Req messages and hardware does not support
+		 * timestamping all packets => return error
+		 */
+		fep->hwts_rx_en = 1;
+		config.rx_filter = HWTSTAMP_FILTER_ALL;
+		break;
+	}
+
+	return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ?
+	    -EFAULT : 0;
+}
+
+/**
+ * fec_time_keep - call timecounter_read every second to avoid timer overrun
+ *                 because ENET just support 32bit counter, will timeout in 4s
+ */
+static void fec_time_keep(unsigned long _data)
+{
+	struct fec_enet_private *fep = (struct fec_enet_private *)_data;
+	u64 ns;
+	unsigned long flags;
+
+	spin_lock_irqsave(&fep->tmreg_lock, flags);
+	ns = timecounter_read(&fep->tc);
+	spin_unlock_irqrestore(&fep->tmreg_lock, flags);
+
+	mod_timer(&fep->time_keep, jiffies + HZ);
+}
+
+/**
+ * fec_ptp_init
+ * @ndev: The FEC network adapter
+ *
+ * This function performs the required steps for enabling ptp
+ * support. If ptp support has already been loaded it simply calls the
+ * cyclecounter init routine and exits.
+ */
+
+void fec_ptp_init(struct net_device *ndev, struct platform_device *pdev)
+{
+	struct fec_enet_private *fep = netdev_priv(ndev);
+
+	fep->ptp_caps.owner = THIS_MODULE;
+	snprintf(fep->ptp_caps.name, 16, "fec ptp");
+
+	fep->ptp_caps.max_adj = 250000000;
+	fep->ptp_caps.n_alarm = 0;
+	fep->ptp_caps.n_ext_ts = 0;
+	fep->ptp_caps.n_per_out = 0;
+	fep->ptp_caps.pps = 0;
+	fep->ptp_caps.adjfreq = fec_ptp_adjfreq;
+	fep->ptp_caps.adjtime = fec_ptp_adjtime;
+	fep->ptp_caps.gettime = fec_ptp_gettime;
+	fep->ptp_caps.settime = fec_ptp_settime;
+	fep->ptp_caps.enable = fec_ptp_enable;
+
+	fep->cycle_speed = clk_get_rate(fep->clk_ptp);
+
+	spin_lock_init(&fep->tmreg_lock);
+
+	fec_ptp_start_cyclecounter(ndev);
+
+	init_timer(&fep->time_keep);
+	fep->time_keep.data = (unsigned long)fep;
+	fep->time_keep.function = fec_time_keep;
+	fep->time_keep.expires = jiffies + HZ;
+	add_timer(&fep->time_keep);
+
+	fep->ptp_clock = ptp_clock_register(&fep->ptp_caps, &pdev->dev);
+	if (IS_ERR(fep->ptp_clock)) {
+		fep->ptp_clock = NULL;
+		pr_err("ptp_clock_register failed\n");
+	} else {
+		pr_info("registered PHC device on %s\n", ndev->name);
+	}
+}
+
  /*
   * XXX:  We need to clean up on failure exits here.
   *
diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h
index eb43729..2a01f79 100644
--- a/drivers/net/ethernet/freescale/fec.h
+++ b/drivers/net/ethernet/freescale/fec.h
@@ -191,6 +191,29 @@ struct bufdesc_ex {
 #define BD_ENET_RX_INT          0x00800000
 #define BD_ENET_RX_PTP          ((ushort)0x0400)
 
+/* FEC 1588 register bits */
+#define FEC_T_CTRL_SLAVE                0x00002000
+#define FEC_T_CTRL_CAPTURE              0x00000800
+#define FEC_T_CTRL_RESTART              0x00000200
+#define FEC_T_CTRL_PERIOD_RST           0x00000030
+#define FEC_T_CTRL_PERIOD_EN		0x00000010
+#define FEC_T_CTRL_ENABLE               0x00000001
+
+#define FEC_T_INC_MASK                  0x0000007f
+#define FEC_T_INC_OFFSET                0
+#define FEC_T_INC_CORR_MASK             0x00007f00
+#define FEC_T_INC_CORR_OFFSET           8
+
+#define FEC_ATIME_CTRL		0x400
+#define FEC_ATIME		0x404
+#define FEC_ATIME_EVT_OFFSET	0x408
+#define FEC_ATIME_EVT_PERIOD	0x40c
+#define FEC_ATIME_CORR		0x410
+#define FEC_ATIME_INC		0x414
+#define FEC_TS_TIMESTAMP	0x418
+
+#define FEC_CC_MULT	(1 << 31)
+
 /* The FEC buffer descriptors track the ring buffers.  The rx_bd_base and
  * tx_bd_base always point to the base of the buffer descriptors.  The
  * cur_rx and cur_tx point to the currently available buffer.
diff --git a/drivers/net/ethernet/freescale/fec_ptp.c b/drivers/net/ethernet/freescale/fec_ptp.c
deleted file mode 100644
index 0d8df40..0000000
--- a/drivers/net/ethernet/freescale/fec_ptp.c
+++ /dev/null
@@ -1,388 +0,0 @@
-/*
- * Fast Ethernet Controller (ENET) PTP driver for MX6x.
- *
- * Copyright (C) 2012 Freescale Semiconductor, Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope 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.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/ptrace.h>
-#include <linux/errno.h>
-#include <linux/ioport.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/pci.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/spinlock.h>
-#include <linux/workqueue.h>
-#include <linux/bitops.h>
-#include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/clk.h>
-#include <linux/platform_device.h>
-#include <linux/phy.h>
-#include <linux/fec.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
-#include <linux/of_gpio.h>
-#include <linux/of_net.h>
-
-#include "fec.h"
-
-/* FEC 1588 register bits */
-#define FEC_T_CTRL_SLAVE                0x00002000
-#define FEC_T_CTRL_CAPTURE              0x00000800
-#define FEC_T_CTRL_RESTART              0x00000200
-#define FEC_T_CTRL_PERIOD_RST           0x00000030
-#define FEC_T_CTRL_PERIOD_EN		0x00000010
-#define FEC_T_CTRL_ENABLE               0x00000001
-
-#define FEC_T_INC_MASK                  0x0000007f
-#define FEC_T_INC_OFFSET                0
-#define FEC_T_INC_CORR_MASK             0x00007f00
-#define FEC_T_INC_CORR_OFFSET           8
-
-#define FEC_ATIME_CTRL		0x400
-#define FEC_ATIME		0x404
-#define FEC_ATIME_EVT_OFFSET	0x408
-#define FEC_ATIME_EVT_PERIOD	0x40c
-#define FEC_ATIME_CORR		0x410
-#define FEC_ATIME_INC		0x414
-#define FEC_TS_TIMESTAMP	0x418
-
-#define FEC_CC_MULT	(1 << 31)
-/**
- * fec_ptp_read - read raw cycle counter (to be used by time counter)
- * @cc: the cyclecounter structure
- *
- * this function reads the cyclecounter registers and is called by the
- * cyclecounter structure used to construct a ns counter from the
- * arbitrary fixed point registers
- */
-static cycle_t fec_ptp_read(const struct cyclecounter *cc)
-{
-	struct fec_enet_private *fep =
-		container_of(cc, struct fec_enet_private, cc);
-	u32 tempval;
-
-	tempval = readl(fep->hwp + FEC_ATIME_CTRL);
-	tempval |= FEC_T_CTRL_CAPTURE;
-	writel(tempval, fep->hwp + FEC_ATIME_CTRL);
-
-	return readl(fep->hwp + FEC_ATIME);
-}
-
-/**
- * fec_ptp_start_cyclecounter - create the cycle counter from hw
- * @ndev: network device
- *
- * this function initializes the timecounter and cyclecounter
- * structures for use in generated a ns counter from the arbitrary
- * fixed point cycles registers in the hardware.
- */
-void fec_ptp_start_cyclecounter(struct net_device *ndev)
-{
-	struct fec_enet_private *fep = netdev_priv(ndev);
-	unsigned long flags;
-	int inc;
-
-	inc = 1000000000 / fep->cycle_speed;
-
-	/* grab the ptp lock */
-	spin_lock_irqsave(&fep->tmreg_lock, flags);
-
-	/* 1ns counter */
-	writel(inc << FEC_T_INC_OFFSET, fep->hwp + FEC_ATIME_INC);
-
-	/* use free running count */
-	writel(0, fep->hwp + FEC_ATIME_EVT_PERIOD);
-
-	writel(FEC_T_CTRL_ENABLE, fep->hwp + FEC_ATIME_CTRL);
-
-	memset(&fep->cc, 0, sizeof(fep->cc));
-	fep->cc.read = fec_ptp_read;
-	fep->cc.mask = CLOCKSOURCE_MASK(32);
-	fep->cc.shift = 31;
-	fep->cc.mult = FEC_CC_MULT;
-
-	/* reset the ns time counter */
-	timecounter_init(&fep->tc, &fep->cc, ktime_to_ns(ktime_get_real()));
-
-	spin_unlock_irqrestore(&fep->tmreg_lock, flags);
-}
-EXPORT_SYMBOL(fec_ptp_start_cyclecounter);
-
-/**
- * fec_ptp_adjfreq - adjust ptp cycle frequency
- * @ptp: the ptp clock structure
- * @ppb: parts per billion adjustment from base
- *
- * Adjust the frequency of the ptp cycle counter by the
- * indicated ppb from the base frequency.
- *
- * Because ENET hardware frequency adjust is complex,
- * using software method to do that.
- */
-static int fec_ptp_adjfreq(struct ptp_clock_info *ptp, s32 ppb)
-{
-	u64 diff;
-	unsigned long flags;
-	int neg_adj = 0;
-	u32 mult = FEC_CC_MULT;
-
-	struct fec_enet_private *fep =
-	    container_of(ptp, struct fec_enet_private, ptp_caps);
-
-	if (ppb < 0) {
-		ppb = -ppb;
-		neg_adj = 1;
-	}
-
-	diff = mult;
-	diff *= ppb;
-	diff = div_u64(diff, 1000000000ULL);
-
-	spin_lock_irqsave(&fep->tmreg_lock, flags);
-	/*
-	 * dummy read to set cycle_last in tc to now.
-	 * So use adjusted mult to calculate when next call
-	 * timercounter_read.
-	 */
-	timecounter_read(&fep->tc);
-
-	fep->cc.mult = neg_adj ? mult - diff : mult + diff;
-
-	spin_unlock_irqrestore(&fep->tmreg_lock, flags);
-
-	return 0;
-}
-
-/**
- * fec_ptp_adjtime
- * @ptp: the ptp clock structure
- * @delta: offset to adjust the cycle counter by
- *
- * adjust the timer by resetting the timecounter structure.
- */
-static int fec_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
-{
-	struct fec_enet_private *fep =
-	    container_of(ptp, struct fec_enet_private, ptp_caps);
-	unsigned long flags;
-	u64 now;
-
-	spin_lock_irqsave(&fep->tmreg_lock, flags);
-
-	now = timecounter_read(&fep->tc);
-	now += delta;
-
-	/* reset the timecounter */
-	timecounter_init(&fep->tc, &fep->cc, now);
-
-	spin_unlock_irqrestore(&fep->tmreg_lock, flags);
-
-	return 0;
-}
-
-/**
- * fec_ptp_gettime
- * @ptp: the ptp clock structure
- * @ts: timespec structure to hold the current time value
- *
- * read the timecounter and return the correct value on ns,
- * after converting it into a struct timespec.
- */
-static int fec_ptp_gettime(struct ptp_clock_info *ptp, struct timespec *ts)
-{
-	struct fec_enet_private *adapter =
-	    container_of(ptp, struct fec_enet_private, ptp_caps);
-	u64 ns;
-	u32 remainder;
-	unsigned long flags;
-
-	spin_lock_irqsave(&adapter->tmreg_lock, flags);
-	ns = timecounter_read(&adapter->tc);
-	spin_unlock_irqrestore(&adapter->tmreg_lock, flags);
-
-	ts->tv_sec = div_u64_rem(ns, 1000000000ULL, &remainder);
-	ts->tv_nsec = remainder;
-
-	return 0;
-}
-
-/**
- * fec_ptp_settime
- * @ptp: the ptp clock structure
- * @ts: the timespec containing the new time for the cycle counter
- *
- * reset the timecounter to use a new base value instead of the kernel
- * wall timer value.
- */
-static int fec_ptp_settime(struct ptp_clock_info *ptp,
-			   const struct timespec *ts)
-{
-	struct fec_enet_private *fep =
-	    container_of(ptp, struct fec_enet_private, ptp_caps);
-
-	u64 ns;
-	unsigned long flags;
-
-	ns = ts->tv_sec * 1000000000ULL;
-	ns += ts->tv_nsec;
-
-	spin_lock_irqsave(&fep->tmreg_lock, flags);
-	timecounter_init(&fep->tc, &fep->cc, ns);
-	spin_unlock_irqrestore(&fep->tmreg_lock, flags);
-	return 0;
-}
-
-/**
- * fec_ptp_enable
- * @ptp: the ptp clock structure
- * @rq: the requested feature to change
- * @on: whether to enable or disable the feature
- *
- */
-static int fec_ptp_enable(struct ptp_clock_info *ptp,
-			  struct ptp_clock_request *rq, int on)
-{
-	return -EOPNOTSUPP;
-}
-
-/**
- * fec_ptp_hwtstamp_ioctl - control hardware time stamping
- * @ndev: pointer to net_device
- * @ifreq: ioctl data
- * @cmd: particular ioctl requested
- */
-int fec_ptp_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd)
-{
-	struct fec_enet_private *fep = netdev_priv(ndev);
-
-	struct hwtstamp_config config;
-
-	if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
-		return -EFAULT;
-
-	/* reserved for future extensions */
-	if (config.flags)
-		return -EINVAL;
-
-	switch (config.tx_type) {
-	case HWTSTAMP_TX_OFF:
-		fep->hwts_tx_en = 0;
-		break;
-	case HWTSTAMP_TX_ON:
-		fep->hwts_tx_en = 1;
-		break;
-	default:
-		return -ERANGE;
-	}
-
-	switch (config.rx_filter) {
-	case HWTSTAMP_FILTER_NONE:
-		if (fep->hwts_rx_en)
-			fep->hwts_rx_en = 0;
-		config.rx_filter = HWTSTAMP_FILTER_NONE;
-		break;
-
-	default:
-		/*
-		 * register RXMTRL must be set in order to do V1 packets,
-		 * therefore it is not possible to time stamp both V1 Sync and
-		 * Delay_Req messages and hardware does not support
-		 * timestamping all packets => return error
-		 */
-		fep->hwts_rx_en = 1;
-		config.rx_filter = HWTSTAMP_FILTER_ALL;
-		break;
-	}
-
-	return copy_to_user(ifr->ifr_data, &config, sizeof(config)) ?
-	    -EFAULT : 0;
-}
-EXPORT_SYMBOL(fec_ptp_ioctl);
-
-/**
- * fec_time_keep - call timecounter_read every second to avoid timer overrun
- *                 because ENET just support 32bit counter, will timeout in 4s
- */
-static void fec_time_keep(unsigned long _data)
-{
-	struct fec_enet_private *fep = (struct fec_enet_private *)_data;
-	u64 ns;
-	unsigned long flags;
-
-	spin_lock_irqsave(&fep->tmreg_lock, flags);
-	ns = timecounter_read(&fep->tc);
-	spin_unlock_irqrestore(&fep->tmreg_lock, flags);
-
-	mod_timer(&fep->time_keep, jiffies + HZ);
-}
-
-/**
- * fec_ptp_init
- * @ndev: The FEC network adapter
- *
- * This function performs the required steps for enabling ptp
- * support. If ptp support has already been loaded it simply calls the
- * cyclecounter init routine and exits.
- */
-
-void fec_ptp_init(struct net_device *ndev, struct platform_device *pdev)
-{
-	struct fec_enet_private *fep = netdev_priv(ndev);
-
-	fep->ptp_caps.owner = THIS_MODULE;
-	snprintf(fep->ptp_caps.name, 16, "fec ptp");
-
-	fep->ptp_caps.max_adj = 250000000;
-	fep->ptp_caps.n_alarm = 0;
-	fep->ptp_caps.n_ext_ts = 0;
-	fep->ptp_caps.n_per_out = 0;
-	fep->ptp_caps.pps = 0;
-	fep->ptp_caps.adjfreq = fec_ptp_adjfreq;
-	fep->ptp_caps.adjtime = fec_ptp_adjtime;
-	fep->ptp_caps.gettime = fec_ptp_gettime;
-	fep->ptp_caps.settime = fec_ptp_settime;
-	fep->ptp_caps.enable = fec_ptp_enable;
-
-	fep->cycle_speed = clk_get_rate(fep->clk_ptp);
-
-	spin_lock_init(&fep->tmreg_lock);
-
-	fec_ptp_start_cyclecounter(ndev);
-
-	init_timer(&fep->time_keep);
-	fep->time_keep.data = (unsigned long)fep;
-	fep->time_keep.function = fec_time_keep;
-	fep->time_keep.expires = jiffies + HZ;
-	add_timer(&fep->time_keep);
-
-	fep->ptp_clock = ptp_clock_register(&fep->ptp_caps, &pdev->dev);
-	if (IS_ERR(fep->ptp_clock)) {
-		fep->ptp_clock = NULL;
-		pr_err("ptp_clock_register failed\n");
-	} else {
-		pr_info("registered PHC device on %s\n", ndev->name);
-	}
-}
-EXPORT_SYMBOL(fec_ptp_init);
-- 
1.7.9.5