openwrt-mirror/target/linux/coldfire/patches/020-Add-dual-FEC-1588-timer-support.patch

From 67d56859d24864af530506c76523f0fc3c5cb502 Mon Sep 17 00:00:00 2001
From: Alison Wang <b18965@freescale.com>
Date: Thu, 4 Aug 2011 09:59:44 +0800
Subject: [PATCH 20/52] Add dual FEC 1588 timer support

Add Modelo dual FEC 1588 function with IXXXAT statck.

Signed-off-by: Alison Wang <b18965@freescale.com>
---
 drivers/net/Kconfig    |    6 +
 drivers/net/Makefile   |    3 +
 drivers/net/fec.c      |  153 ++++++++++++-
 drivers/net/fec.h      |   25 ++
 drivers/net/fec_1588.c |  626 ++++++++++++++++++++++++++++++++++++++++++++++++
 drivers/net/fec_1588.h |  195 +++++++++++++++
 6 files changed, 1006 insertions(+), 2 deletions(-)
 create mode 100644 drivers/net/fec_1588.c
 create mode 100644 drivers/net/fec_1588.h

--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -1958,6 +1958,12 @@ config FEC2
 	  Say Y here if you want to use the second built-in 10/100 Fast
 	  ethernet controller on some Motorola ColdFire processors.
 
+config FEC_1588
+        bool "Enable 1588 interface(on some ColdFire designs)"
+	depends on M5441X && FEC
+	help
+		Say Y here if 1588 function is enabled.
+
 config FEC_548x
 	tristate "MCF547x/MCF548x Fast Ethernet Controller support"
 	depends on M547X_8X
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -123,6 +123,9 @@ obj-$(CONFIG_PCMCIA_PCNET) += 8390.o
 obj-$(CONFIG_HP100) += hp100.o
 obj-$(CONFIG_SMC9194) += smc9194.o
 obj-$(CONFIG_FEC) += fec.o
+ifeq ($(CONFIG_FEC_1588), y)
+obj-$(CONFIG_FEC) += fec_1588.o
+endif
 obj-$(CONFIG_FEC_548x) += fec_m547x.o
 obj-$(CONFIG_FEC_MPC52xx) += fec_mpc52xx.o
 ifeq ($(CONFIG_FEC_MPC52xx_MDIO),y)
--- a/drivers/net/fec.c
+++ b/drivers/net/fec.c
@@ -53,6 +53,7 @@
 #endif
 
 #include "fec.h"
+#include "fec_1588.h"
 
 #if defined(CONFIG_ARCH_MXC) || defined(CONFIG_SOC_IMX28)
 #define FEC_ALIGNMENT	0xf
@@ -135,8 +136,15 @@ MODULE_PARM_DESC(macaddr, "FEC Ethernet
 #define FEC_ENET_RXB	((uint)0x01000000)	/* A buffer was received */
 #define FEC_ENET_MII	((uint)0x00800000)	/* MII interrupt */
 #define FEC_ENET_EBERR	((uint)0x00400000)	/* SDMA bus error */
+#define FEC_ENET_TS_AVAIL	((uint)0x00010000)
+#define FEC_ENET_TS_TIMER	((uint)0x00008000)
 
+#if defined(CONFIG_FEC_1588)
+#define FEC_DEFAULT_IMASK (FEC_ENET_TXF | FEC_ENET_RXF | FEC_ENET_MII | \
+			FEC_ENET_TS_AVAIL | FEC_ENET_TS_TIMER)
+#else
 #define FEC_DEFAULT_IMASK (FEC_ENET_TXF | FEC_ENET_RXF | FEC_ENET_MII)
+#endif
 
 /* The FEC stores dest/src/type, data, and checksum for receive packets.
  */
@@ -209,6 +217,10 @@ struct fec_enet_private {
 	int	link;
 	int	full_duplex;
 	struct	completion mdio_done;
+#ifdef CONFIG_FEC_1588
+	struct fec_ptp_private *ptp_priv;
+	uint    ptimer_present;
+#endif
 };
 
 static irqreturn_t fec_enet_interrupt(int irq, void * dev_id);
@@ -252,6 +264,9 @@ fec_enet_start_xmit(struct sk_buff *skb,
 	struct bufdesc *bdp;
 	void *bufaddr;
 	unsigned short	status;
+#ifdef CONFIG_FEC_1588
+	unsigned long estatus;
+#endif
 	unsigned long flags;
 
 	if (!fep->link) {
@@ -293,6 +308,17 @@ fec_enet_start_xmit(struct sk_buff *skb,
 		bufaddr = fep->tx_bounce[index];
 	}
 
+#ifdef CONFIG_FEC_1588
+	if (fep->ptimer_present) {
+		if (fec_ptp_do_txstamp(skb))
+			estatus = BD_ENET_TX_TS;
+		else
+			estatus = 0;
+
+		bdp->cbd_esc = (estatus | BD_ENET_TX_INT);
+		bdp->cbd_bdu = 0;
+	}
+#endif
 	/*
 	 * Some design made an incorrect assumption on endian mode of
 	 * the system that it's running on. As the result, driver has to
@@ -357,6 +383,9 @@ fec_enet_interrupt(int irq, void * dev_i
 {
 	struct	net_device *dev = dev_id;
 	struct fec_enet_private *fep = netdev_priv(dev);
+#ifdef CONFIG_FEC_1588
+	struct fec_ptp_private *fpp = fep->ptp_priv;
+#endif
 	uint	int_events;
 	irqreturn_t ret = IRQ_NONE;
 
@@ -364,6 +393,10 @@ fec_enet_interrupt(int irq, void * dev_i
 		int_events = readl(fep->hwp + FEC_IEVENT);
 		writel(int_events, fep->hwp + FEC_IEVENT);
 
+#ifdef CONFIG_FEC_1588
+		if (__raw_readb(MCF_DTIM1_DTER) & MCF_DTIM_DTER_REF)
+			__raw_writeb(MCF_DTIM_DTER_REF, MCF_DTIM1_DTER);
+#endif
 		if (int_events & FEC_ENET_RXF) {
 			ret = IRQ_HANDLED;
 			fec_enet_rx(dev);
@@ -378,6 +411,19 @@ fec_enet_interrupt(int irq, void * dev_i
 			fec_enet_tx(dev);
 		}
 
+#ifdef CONFIG_FEC_1588
+		if (int_events & FEC_ENET_TS_AVAIL) {
+			ret = IRQ_HANDLED;
+			fec_ptp_store_txstamp(fep->ptp_priv);
+		}
+
+		if (int_events & FEC_ENET_TS_TIMER) {
+			ret = IRQ_HANDLED;
+			if (fep->ptimer_present)
+				fpp->prtc++;
+		}
+#endif
+
 		if (int_events & FEC_ENET_MII) {
 			ret = IRQ_HANDLED;
 			complete(&fep->mdio_done);
@@ -394,6 +440,9 @@ fec_enet_tx(struct net_device *dev)
 	struct	fec_enet_private *fep;
 	struct bufdesc *bdp;
 	unsigned short status;
+#ifdef CONFIG_FEC_1588
+	unsigned long estatus;
+#endif
 	struct	sk_buff	*skb;
 
 	fep = netdev_priv(dev);
@@ -437,6 +486,13 @@ fec_enet_tx(struct net_device *dev)
 		if (status & BD_ENET_TX_DEF)
 			dev->stats.collisions++;
 
+#if defined(CONFIG_FEC_1588)
+		if (fep->ptimer_present) {
+			estatus = bdp->cbd_esc;
+			if (estatus & BD_ENET_TX_TS)
+				fec_ptp_store_txstamp(fep->ptp_priv);
+		}
+#endif
 		/* Free the sk buffer associated with this last transmit */
 		dev_kfree_skb_any(skb);
 		fep->tx_skbuff[fep->skb_dirty] = NULL;
@@ -470,6 +526,9 @@ static void
 fec_enet_rx(struct net_device *dev)
 {
 	struct	fec_enet_private *fep = netdev_priv(dev);
+#ifdef CONFIG_FEC_1588
+	struct fec_ptp_private *fpp = fep->ptp_priv;
+#endif
 	const struct platform_device_id *id_entry =
 				platform_get_device_id(fep->pdev);
 	struct bufdesc *bdp;
@@ -554,6 +613,12 @@ fec_enet_rx(struct net_device *dev)
 			skb_put(skb, pkt_len - 4);	/* Make room */
 			skb_copy_to_linear_data(skb, data, pkt_len - 4);
 			skb->protocol = eth_type_trans(skb, dev);
+
+#ifdef CONFIG_FEC_1588
+			/* 1588 messeage TS handle */
+			if (fep->ptimer_present)
+				fec_ptp_store_rxstamp(fpp, skb, bdp);
+#endif
 			netif_rx(skb);
 		}
 
@@ -567,6 +632,11 @@ rx_processing_done:
 		status |= BD_ENET_RX_EMPTY;
 		bdp->cbd_sc = status;
 
+#ifdef CONFIG_FEC_1588
+		bdp->cbd_esc = BD_ENET_RX_INT;
+		bdp->cbd_prot = 0;
+		bdp->cbd_bdu = 0;
+#endif
 		/* Update BD pointer to next entry */
 		if (status & BD_ENET_RX_WRAP)
 			bdp = fep->rx_bd_base;
@@ -669,8 +739,11 @@ static void fec_enet_adjust_link(struct
 			fec_stop(dev);
 
 		if (id_entry->driver_data & FEC_QUIRK_ENET_MAC)
-			writel(2, fep->hwp + FEC_ECNTRL);
-
+#ifdef CONFIG_FEC_1588
+			writel(0x00000012, fep->hwp + FEC_ECNTRL);
+#else
+			writel(0x00000002, fep->hwp + FEC_ECNTRL);
+#endif
 		status_change = 1;
 	}
 
@@ -983,6 +1056,10 @@ static int fec_enet_alloc_buffers(struct
 		bdp->cbd_bufaddr = dma_map_single(&dev->dev, skb->data,
 				FEC_ENET_RX_FRSIZE, DMA_FROM_DEVICE);
 		bdp->cbd_sc = BD_ENET_RX_EMPTY;
+
+#ifdef CONFIG_FEC_1588
+		bdp->cbd_esc = BD_ENET_RX_INT;
+#endif
 		bdp++;
 	}
 
@@ -996,6 +1073,9 @@ static int fec_enet_alloc_buffers(struct
 
 		bdp->cbd_sc = 0;
 		bdp->cbd_bufaddr = 0;
+#ifdef CONFIG_FEC_1588
+		bdp->cbd_esc = BD_ENET_TX_INT;
+#endif
 		bdp++;
 	}
 
@@ -1256,8 +1336,12 @@ fec_restart(struct net_device *dev, int
 		writel(cpu_to_be32(temp_mac[1]), fep->hwp + FEC_ADDR_HIGH);
 	}
 
+#ifdef CONFIG_FEC_1588
+	writel(0x7fff8000, fep->hwp + FEC_IEVENT);
+#else
 	/* Clear any outstanding interrupt. */
 	writel(0xffc00000, fep->hwp + FEC_IEVENT);
+#endif
 
 	/* Reset all multicast.	*/
 	writel(0, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
@@ -1342,8 +1426,25 @@ fec_restart(struct net_device *dev, int
 #endif
 	}
 
+#ifdef CONFIG_FEC_1588
+	if (fep->ptimer_present) {
+		int ret;
+		/* Set Timer count */
+		ret = fec_ptp_start(fep->ptp_priv);
+		if (ret) {
+			fep->ptimer_present = 0;
+			writel(2, fep->hwp + FEC_ECNTRL);
+		} else {
+			val = readl(fep->hwp + FEC_ECNTRL);
+			val |= 0x00000012;
+			writel(val, fep->hwp + FEC_ECNTRL);
+		}
+	} else
+		writel(2, fep->hwp + FEC_ECNTRL);
+#else
 	/* And last, enable the transmit and receive processing */
 	writel(2, fep->hwp + FEC_ECNTRL);
+#endif
 	writel(0, fep->hwp + FEC_R_DES_ACTIVE);
 
 	/* Enable interrupts we wish to service */
@@ -1367,6 +1468,10 @@ fec_stop(struct net_device *dev)
 	writel(1, fep->hwp + FEC_ECNTRL);
 	udelay(10);
 	writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);
+#ifdef CONFIG_FEC_1588
+	if (fep->ptimer_present)
+		fec_ptp_stop(fep->ptp_priv);
+#endif
 	writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK);
 }
 
@@ -1428,6 +1533,24 @@ fec_probe(struct platform_device *pdev)
 		}
 	}
 
+#ifdef CONFIG_FEC_1588
+	i = (pdev->id) ? (64 + 64 + 64 + 7) : (64 + 64 + 64);
+	if (request_irq(i + 48, fec_enet_interrupt, IRQF_DISABLED,
+				"1588 TS AVAIL", ndev) != 0)
+		printk(KERN_ERR "FEC: Could not alloc FEC %x 1588 TS AVAIL "
+			"IRQ(%d)!\n", pdev->id, i + 48);
+
+	if (pdev->id == 0) {
+		printk("setup TS timer interrupt through DMA timer1\n");
+		__raw_writew(MCF_DTIM_DTMR_RST_RST, MCF_DTIM1_DTMR);
+
+		if (request_irq(64 + 33, fec_enet_interrupt, IRQF_DISABLED,
+					"1588 TS TIMER", ndev) != 0)
+			printk(KERN_ERR "FEC: Could not alloc FEC %x 1588 TS"
+				" TIMER IRQ(%d)!\n", pdev->id, 64 + 33);
+	}
+#endif
+
 	fep->clk = clk_get(&pdev->dev, "fec_clk");
 	if (IS_ERR(fep->clk)) {
 		ret = PTR_ERR(fep->clk);
@@ -1443,6 +1566,20 @@ fec_probe(struct platform_device *pdev)
 	if (ret)
 		goto failed_mii_init;
 
+#ifdef CONFIG_FEC_1588
+	fep->ptp_priv = kzalloc(sizeof(struct fec_ptp_private),
+					GFP_KERNEL);
+	if (fep->ptp_priv) {
+		fep->ptp_priv->hwp = fep->hwp;
+		ret = fec_ptp_init(fep->ptp_priv, pdev->id);
+		if (ret)
+			printk(KERN_ERR "IEEE1588: ptp-timer init failed\n");
+		else
+			fep->ptimer_present = 1;
+	} else
+		printk(KERN_ERR "IEEE1588: failed to malloc memory\n");
+#endif
+
 	/* Carrier starts down, phylib will bring it up */
 	netif_carrier_off(ndev);
 
@@ -1454,6 +1591,12 @@ fec_probe(struct platform_device *pdev)
 
 failed_register:
 	fec_enet_mii_remove(fep);
+#ifdef CONFIG_FEC_1588
+	if (fep->ptimer_present)
+		fec_ptp_cleanup(fep->ptp_priv);
+
+	kfree(fep->ptp_priv);
+#endif
 failed_mii_init:
 failed_init:
 	clk_disable(fep->clk);
@@ -1485,6 +1628,12 @@ fec_drv_remove(struct platform_device *p
 	clk_disable(fep->clk);
 	clk_put(fep->clk);
 	iounmap((void __iomem *)ndev->base_addr);
+#ifdef CONFIG_FEC_1588
+	if (fep->ptimer_present)
+		fec_ptp_cleanup(fep->ptp_priv);
+
+	kfree(fep->ptp_priv);
+#endif
 	unregister_netdev(ndev);
 	free_netdev(ndev);
 	return 0;
--- a/drivers/net/fec.h
+++ b/drivers/net/fec.h
@@ -50,6 +50,16 @@
 #define FEC_MIIGSK_CFGR		0x300 /* MIIGSK Configuration reg */
 #define FEC_MIIGSK_ENR		0x308 /* MIIGSK Enable reg */
 
+#if defined(CONFIG_FEC_1588)
+#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
+#endif
+
 #else
 
 #define FEC_ECNTRL		0x000 /* Ethernet control reg */
@@ -78,6 +88,9 @@
 
 #endif /* CONFIG_M5272 */
 
+#if defined(CONFIG_FEC_1588)
+#define FEC_ENHANCED_MODE	1
+#endif
 
 /*
  *	Define the buffer descriptor structure.
@@ -93,6 +106,14 @@ struct bufdesc {
 	unsigned short	cbd_sc;			/* Control and status info */
 	unsigned short	cbd_datlen;		/* Data length */
 	unsigned long	cbd_bufaddr;		/* Buffer address */
+
+#ifdef FEC_ENHANCED_MODE
+	unsigned long cbd_esc;
+	unsigned long cbd_prot;
+	unsigned long cbd_bdu;
+	unsigned long ts;
+	unsigned short res0[4];
+#endif
 };
 #endif
 
@@ -128,6 +149,7 @@ struct bufdesc {
 #define BD_ENET_RX_OV           ((ushort)0x0002)
 #define BD_ENET_RX_CL           ((ushort)0x0001)
 #define BD_ENET_RX_STATS        ((ushort)0x013f)        /* All status bits */
+#define BD_ENET_RX_INT          0x00800000
 
 /* Buffer descriptor control/status used by Ethernet transmit.
 */
@@ -146,6 +168,9 @@ struct bufdesc {
 #define BD_ENET_TX_CSL          ((ushort)0x0001)
 #define BD_ENET_TX_STATS        ((ushort)0x03ff)        /* All status bits */
 
+#define BD_ENET_TX_TS           0x20000000
+#define BD_ENET_TX_INT          0x40000000
+#define BD_ENET_TX_BDU          0x80000000
 
 /****************************************************************************/
 #endif /* FEC_H */
--- /dev/null
+++ b/drivers/net/fec_1588.c
@@ -0,0 +1,626 @@
+/*
+ * drivers/net/fec_1588.c
+ *
+ * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright (C) 2009 IXXAT Automation, GmbH
+ *
+ * FEC Ethernet Driver -- IEEE 1588 interface functionality
+ *
+ * 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <linux/io.h>
+#include <linux/device.h>
+#include <linux/fs.h>
+#include <linux/vmalloc.h>
+#include <linux/spinlock.h>
+#include <linux/ip.h>
+#include <linux/udp.h>
+#include <asm/mcf5441x_ccm.h>
+#include <asm/mcf5441x_dtim.h>
+#include <asm/mcfsim.h>
+#include "fec_1588.h"
+
+static DECLARE_WAIT_QUEUE_HEAD(ptp_rx_ts_wait);
+#define PTP_GET_RX_TIMEOUT      (HZ/10)
+#define COLDFIRE_DTIM1_INT	(64+32+1)
+
+static struct fec_ptp_private *ptp_private[2];
+
+static void init_DTIM1_for_1588(struct fec_ptp_private *priv)
+{
+	printk(KERN_INFO "Initializing DTIM1 for 1588 TS timer\n");
+
+	__raw_writew(MCF_DTIM_DTMR_RST_RST, MCF_DTIM1_DTMR);
+
+	/*Enable 1588*/
+
+	__raw_writeb(MCF_DTIM_DTXMR_1588EN, MCF_DTIM1_DTXMR);
+
+	/*Compare to the 1588 timerbase*/
+	__raw_writel(FEC_T_PERIOD_ONE_SEC - FEC_T_INC_40MHZ, MCF_DTIM1_DTRR);
+
+	__raw_writeb(MCF_DTIM_DTER_REF, MCF_DTIM1_DTER);
+
+	MCF_GPIO_PAR_TIMER = (MCF_GPIO_PAR_TIMER & MCF_GPIO_PAR_TIMER_T1IN_MASK)
+				| MCF_GPIO_PAR_TIMER_T1IN_T1OUT;
+}
+
+static void start_DTIM1(void)
+{
+	__raw_writew(MCF_DTIM_DTMR_RST_EN | MCF_DTIM_DTMR_ORRI |
+			MCF_DTIM_DTMR_OM, MCF_DTIM1_DTMR);
+}
+
+static void stop_DTIM1(void)
+{
+	__raw_writew(MCF_DTIM_DTMR_RST_RST, MCF_DTIM1_DTMR);
+}
+
+/* Alloc the ring resource */
+static int fec_ptp_init_circ(struct circ_buf *ptp_buf)
+{
+	ptp_buf->buf = vmalloc(DEFAULT_PTP_RX_BUF_SZ *
+					sizeof(struct fec_ptp_data_t));
+
+	if (!ptp_buf->buf)
+		return 1;
+	ptp_buf->head = 0;
+	ptp_buf->tail = 0;
+
+	return 0;
+}
+
+static inline int fec_ptp_calc_index(int size, int curr_index, int offset)
+{
+	return (curr_index + offset) % size;
+}
+
+static int fec_ptp_is_empty(struct circ_buf *buf)
+{
+	return (buf->head == buf->tail);
+}
+
+static int fec_ptp_nelems(struct circ_buf *buf)
+{
+	const int front = buf->head;
+	const int end = buf->tail;
+	const int size = DEFAULT_PTP_RX_BUF_SZ;
+	int n_items;
+
+	if (end > front)
+		n_items = end - front;
+	else if (end < front)
+		n_items = size - (front - end);
+	else
+		n_items = 0;
+
+	return n_items;
+}
+
+static int fec_ptp_is_full(struct circ_buf *buf)
+{
+	if (fec_ptp_nelems(buf) ==
+				(DEFAULT_PTP_RX_BUF_SZ - 1))
+		return 1;
+	else
+		return 0;
+}
+
+static int fec_ptp_insert(struct circ_buf *ptp_buf,
+			  struct fec_ptp_data_t *data,
+			  struct fec_ptp_private *priv)
+{
+	struct fec_ptp_data_t *tmp;
+
+	if (fec_ptp_is_full(ptp_buf))
+		return 1;
+
+	spin_lock(&priv->ptp_lock);
+	tmp = (struct fec_ptp_data_t *)(ptp_buf->buf) + ptp_buf->tail;
+
+	tmp->key = data->key;
+	tmp->ts_time.sec = data->ts_time.sec;
+	tmp->ts_time.nsec = data->ts_time.nsec;
+
+	ptp_buf->tail = fec_ptp_calc_index(DEFAULT_PTP_RX_BUF_SZ,
+					ptp_buf->tail, 1);
+	spin_unlock(&priv->ptp_lock);
+
+	return 0;
+}
+
+static int fec_ptp_find_and_remove(struct circ_buf *ptp_buf,
+				   int key,
+				   struct fec_ptp_data_t *data,
+				   struct fec_ptp_private *priv)
+{
+	int i;
+	int size = DEFAULT_PTP_RX_BUF_SZ;
+	int end = ptp_buf->tail;
+	unsigned long flags;
+	struct fec_ptp_data_t *tmp;
+
+	if (fec_ptp_is_empty(ptp_buf))
+		return 1;
+
+	i = ptp_buf->head;
+	while (i != end) {
+		tmp = (struct fec_ptp_data_t *)(ptp_buf->buf) + i;
+		if (tmp->key == key)
+			break;
+		i = fec_ptp_calc_index(size, i, 1);
+	}
+
+	spin_lock_irqsave(&priv->ptp_lock, flags);
+	if (i == end) {
+		ptp_buf->head = end;
+		spin_unlock_irqrestore(&priv->ptp_lock, flags);
+		return 1;
+	}
+
+	data->ts_time.sec = tmp->ts_time.sec;
+	data->ts_time.nsec = tmp->ts_time.nsec;
+
+	ptp_buf->head = fec_ptp_calc_index(size, i, 1);
+	spin_unlock_irqrestore(&priv->ptp_lock, flags);
+
+	return 0;
+}
+
+/* 1588 Module intialization */
+int fec_ptp_start(struct fec_ptp_private *priv)
+{
+	struct fec_ptp_private *fpp = priv;
+
+	MCF_CCM_MISCCR3 = 0x0000;
+
+	init_DTIM1_for_1588(priv);
+
+	/* Select 1588 Timer source and enable module for starting Tmr Clock */
+	fec_writel(FEC_T_CTRL_RESTART, fpp->hwp + FEC_ATIME_CTRL);
+	fec_writel(FEC_T_INC_40MHZ << FEC_T_INC_OFFSET,
+			fpp->hwp + FEC_ATIME_INC);
+	fec_writel(FEC_T_PERIOD_ONE_SEC, fpp->hwp + FEC_ATIME_EVT_PERIOD);
+	/* start counter */
+	fec_writel(FEC_T_CTRL_PERIOD_RST | FEC_T_CTRL_ENABLE |
+		FEC_T_CTRL_PINPER, fpp->hwp + FEC_ATIME_CTRL);
+
+	start_DTIM1();
+
+	return 0;
+}
+
+/* Cleanup routine for 1588 module.
+ * When PTP is disabled this routing is called */
+void fec_ptp_stop(struct fec_ptp_private *priv)
+{
+	struct fec_ptp_private *fpp = priv;
+
+	fec_writel(0, fpp->hwp + FEC_ATIME_CTRL);
+	fec_writel(FEC_T_CTRL_RESTART, fpp->hwp + FEC_ATIME_CTRL);
+	stop_DTIM1();
+}
+
+static void fec_get_curr_cnt(struct fec_ptp_private *priv,
+			struct ptp_rtc_time *curr_time)
+{
+	u32 tempval;
+
+	fec_writel(FEC_T_CTRL_CAPTURE, priv->hwp + FEC_ATIME_CTRL);
+	fec_writel(FEC_T_CTRL_CAPTURE, priv->hwp + FEC_ATIME_CTRL);
+	curr_time->rtc_time.nsec = fec_readl(priv->hwp + FEC_ATIME);
+	curr_time->rtc_time.sec = priv->prtc;
+
+	fec_writel(FEC_T_CTRL_CAPTURE, priv->hwp + FEC_ATIME_CTRL);
+	tempval = fec_readl(priv->hwp + FEC_ATIME);
+	if (tempval < curr_time->rtc_time.nsec) {
+		curr_time->rtc_time.nsec = tempval;
+		curr_time->rtc_time.sec = priv->prtc;
+	}
+}
+
+/* Set the 1588 timer counter registers */
+static void fec_set_1588cnt(struct fec_ptp_private *priv,
+			struct ptp_rtc_time *fec_time)
+{
+	u32 tempval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&priv->cnt_lock, flags);
+
+	priv->prtc = fec_time->rtc_time.sec;
+
+	tempval = fec_time->rtc_time.nsec;
+	fec_writel(tempval, priv->hwp + FEC_ATIME);
+	spin_unlock_irqrestore(&priv->cnt_lock, flags);
+}
+
+/* Set the BD to ptp */
+int fec_ptp_do_txstamp(struct sk_buff *skb)
+{
+	struct iphdr *iph;
+	struct udphdr *udph;
+
+	if (skb->len > 44) {
+		/* Check if port is 319 for PTP Event, and check for UDP */
+		iph = ip_hdr(skb);
+		if (iph == NULL || iph->protocol != FEC_PACKET_TYPE_UDP)
+			return 0;
+
+		udph = udp_hdr(skb);
+		if (udph != NULL && ntohs(udph->source) == 319)
+			return 1;
+	}
+
+	return 0;
+}
+
+void fec_ptp_store_txstamp(struct fec_ptp_private *priv)
+{
+	struct fec_ptp_private *fpp = priv;
+	unsigned int reg;
+
+	reg = fec_readl(fpp->hwp + FEC_TS_TIMESTAMP);
+	fpp->txstamp.nsec = reg;
+	fpp->txstamp.sec = fpp->prtc;
+}
+
+void fec_ptp_store_rxstamp(struct fec_ptp_private *priv,
+			   struct sk_buff *skb,
+			   struct bufdesc *bdp)
+{
+	int msg_type, seq_id, control;
+	struct fec_ptp_data_t tmp_rx_time;
+	struct fec_ptp_private *fpp = priv;
+	struct iphdr *iph;
+	struct udphdr *udph;
+
+	/* Check for UDP, and Check if port is 319 for PTP Event */
+	iph = (struct iphdr *)(skb->data + FEC_PTP_IP_OFFS);
+	if (iph->protocol != FEC_PACKET_TYPE_UDP)
+		return;
+
+	udph = (struct udphdr *)(skb->data + FEC_PTP_UDP_OFFS);
+	if (ntohs(udph->source) != 319)
+		return;
+
+	seq_id = *((u16 *)(skb->data + FEC_PTP_SEQ_ID_OFFS));
+	control = *((u8 *)(skb->data + FEC_PTP_CTRL_OFFS));
+
+	tmp_rx_time.key = ntohs(seq_id);
+	tmp_rx_time.ts_time.sec = fpp->prtc;
+	tmp_rx_time.ts_time.nsec = bdp->ts;
+
+	switch (control) {
+
+	case PTP_MSG_SYNC:
+		fec_ptp_insert(&(priv->rx_time_sync), &tmp_rx_time, priv);
+		break;
+
+	case PTP_MSG_DEL_REQ:
+		fec_ptp_insert(&(priv->rx_time_del_req), &tmp_rx_time, priv);
+		break;
+
+	/* clear transportSpecific field*/
+	case PTP_MSG_ALL_OTHER:
+		msg_type = (*((u8 *)(skb->data +
+				FEC_PTP_MSG_TYPE_OFFS))) & 0x0F;
+		switch (msg_type) {
+		case PTP_MSG_P_DEL_REQ:
+			fec_ptp_insert(&(priv->rx_time_pdel_req),
+						&tmp_rx_time, priv);
+			break;
+		case PTP_MSG_P_DEL_RESP:
+			fec_ptp_insert(&(priv->rx_time_pdel_resp),
+					&tmp_rx_time, priv);
+			break;
+		default:
+			break;
+		}
+		break;
+	default:
+		break;
+	}
+
+	wake_up_interruptible(&ptp_rx_ts_wait);
+}
+
+static void fec_get_tx_timestamp(struct fec_ptp_private *priv,
+				 struct ptp_time *tx_time)
+{
+	tx_time->sec = priv->txstamp.sec;
+	tx_time->nsec = priv->txstamp.nsec;
+}
+
+static uint8_t fec_get_rx_time(struct fec_ptp_private *priv,
+			       struct ptp_ts_data *pts,
+			       struct ptp_time *rx_time)
+{
+	struct fec_ptp_data_t tmp;
+	int key, flag;
+	u8 mode;
+
+	key = pts->seq_id;
+	mode = pts->message_type;
+	switch (mode) {
+	case PTP_MSG_SYNC:
+		flag = fec_ptp_find_and_remove(&(priv->rx_time_sync),
+						key, &tmp, priv);
+		break;
+	case PTP_MSG_DEL_REQ:
+		flag = fec_ptp_find_and_remove(&(priv->rx_time_del_req),
+						key, &tmp, priv);
+		break;
+
+	case PTP_MSG_P_DEL_REQ:
+		flag = fec_ptp_find_and_remove(&(priv->rx_time_pdel_req),
+						key, &tmp, priv);
+		break;
+	case PTP_MSG_P_DEL_RESP:
+		flag = fec_ptp_find_and_remove(&(priv->rx_time_pdel_resp),
+						key, &tmp, priv);
+		break;
+
+	default:
+		flag = 1;
+		printk(KERN_ERR "ERROR\n");
+		break;
+	}
+
+	if (!flag) {
+		rx_time->sec = tmp.ts_time.sec;
+		rx_time->nsec = tmp.ts_time.nsec;
+		return 0;
+	} else {
+		wait_event_interruptible_timeout(ptp_rx_ts_wait, 0,
+					PTP_GET_RX_TIMEOUT);
+
+		switch (mode) {
+		case PTP_MSG_SYNC:
+			flag = fec_ptp_find_and_remove(&(priv->rx_time_sync),
+				key, &tmp, priv);
+			break;
+		case PTP_MSG_DEL_REQ:
+			flag = fec_ptp_find_and_remove(
+				&(priv->rx_time_del_req), key, &tmp, priv);
+			break;
+		case PTP_MSG_P_DEL_REQ:
+			flag = fec_ptp_find_and_remove(
+				&(priv->rx_time_pdel_req), key, &tmp, priv);
+			break;
+		case PTP_MSG_P_DEL_RESP:
+			flag = fec_ptp_find_and_remove(
+				&(priv->rx_time_pdel_resp), key, &tmp, priv);
+			break;
+		}
+
+		if (flag == 0) {
+			rx_time->sec = tmp.ts_time.sec;
+			rx_time->nsec = tmp.ts_time.nsec;
+			return 0;
+		}
+
+		return -1;
+	}
+}
+
+static void fec_handle_ptpdrift(
+	struct ptp_set_comp *comp,
+	struct ptp_time_correct *ptc)
+{
+	u32 ndrift;
+	u32 i;
+	u32 tmp, tmp_ns, tmp_prid;
+	u32 min_ns, min_prid, miss_ns;
+
+	ndrift = comp->drift;
+	if (ndrift == 0) {
+		ptc->corr_inc = 0;
+		ptc->corr_period = 0;
+		return;
+	}
+
+	if (ndrift >= FEC_ATIME_40MHZ) {
+		ptc->corr_inc = (u32)(ndrift / FEC_ATIME_40MHZ);
+		ptc->corr_period = 1;
+		return;
+	}
+
+	min_ns = 1;
+	tmp = FEC_ATIME_40MHZ % ndrift;
+	tmp_prid = (u32)(FEC_ATIME_40MHZ / ndrift);
+	min_prid = tmp_prid;
+	miss_ns = tmp / tmp_prid;
+	for (i = 2; i <= FEC_T_INC_40MHZ; i++) {
+		tmp = (FEC_ATIME_40MHZ * i) % ndrift;
+		tmp_prid = (FEC_ATIME_40MHZ * i) / ndrift;
+		tmp_ns = tmp / tmp_prid;
+		if (tmp_ns <= 10) {
+			min_ns = i;
+			min_prid = tmp_prid;
+			break;
+		}
+
+		if (tmp_ns < miss_ns) {
+			min_ns = i;
+			min_prid = tmp_prid;
+			miss_ns = tmp_ns;
+		}
+	}
+
+	ptc->corr_inc = min_ns;
+	ptc->corr_period = min_prid;
+}
+
+static void fec_set_drift(struct fec_ptp_private *priv,
+	struct ptp_set_comp *comp)
+{
+	struct ptp_time_correct tc;
+	struct fec_ptp_private *fpp = priv;
+	u32 tmp, corr_ns;
+
+	fec_handle_ptpdrift(comp, &tc);
+	if (tc.corr_inc == 0)
+		return;
+
+	if (comp->o_ops == TRUE)
+		corr_ns = FEC_T_INC_40MHZ + tc.corr_inc;
+	else
+		corr_ns = FEC_T_INC_40MHZ - tc.corr_inc;
+
+	tmp = fec_readl(fpp->hwp + FEC_ATIME_INC) & FEC_T_INC_MASK;
+	tmp |= corr_ns << FEC_T_INC_CORR_OFFSET;
+	fec_writel(tmp, fpp->hwp + FEC_ATIME_INC);
+
+	fec_writel(tc.corr_period, fpp->hwp + FEC_ATIME_CORR);
+}
+
+static int ptp_open(struct inode *inode, struct file *file)
+{
+	return 0;
+}
+
+static int ptp_release(struct inode *inode, struct file *file)
+{
+	return 0;
+}
+
+static long ptp_unlocked_ioctl(
+	struct file *file,
+	unsigned int cmd,
+	unsigned long arg)
+{
+	struct ptp_rtc_time *cnt;
+	struct ptp_rtc_time curr_time;
+	struct ptp_time rx_time, tx_time;
+	struct ptp_ts_data *p_ts;
+	struct ptp_set_comp *p_comp;
+	struct fec_ptp_private *priv;
+	struct inode *inode = file->f_mapping->host;
+	unsigned int minor = MINOR(inode->i_rdev);
+	long retval = 0;
+
+	priv = (struct fec_ptp_private *) ptp_private[minor];
+	switch (cmd) {
+	case PTP_GET_RX_TIMESTAMP:
+		p_ts = (struct ptp_ts_data *)arg;
+		retval = fec_get_rx_time(priv, p_ts, &rx_time);
+		if (retval == 0)
+			copy_to_user((void __user *)(&(p_ts->ts)), &rx_time,
+					sizeof(rx_time));
+		break;
+	case PTP_GET_TX_TIMESTAMP:
+		p_ts = (struct ptp_ts_data *)arg;
+		fec_get_tx_timestamp(priv, &tx_time);
+		copy_to_user((void __user *)(&(p_ts->ts)), &tx_time,
+				sizeof(tx_time));
+		break;
+	case PTP_GET_CURRENT_TIME:
+		fec_get_curr_cnt(priv, &curr_time);
+		copy_to_user((void __user *)arg, &curr_time, sizeof(curr_time));
+		break;
+	case PTP_SET_RTC_TIME:
+		cnt = (struct ptp_rtc_time *)arg;
+		fec_set_1588cnt(priv, cnt);
+		break;
+	case PTP_FLUSH_TIMESTAMP:
+		/* reset sync buffer */
+		priv->rx_time_sync.head = 0;
+		priv->rx_time_sync.tail = 0;
+		/* reset delay_req buffer */
+		priv->rx_time_del_req.head = 0;
+		priv->rx_time_del_req.tail = 0;
+		/* reset pdelay_req buffer */
+		priv->rx_time_pdel_req.head = 0;
+		priv->rx_time_pdel_req.tail = 0;
+		/* reset pdelay_resp buffer */
+		priv->rx_time_pdel_resp.head = 0;
+		priv->rx_time_pdel_resp.tail = 0;
+		break;
+	case PTP_SET_COMPENSATION:
+		p_comp = (struct ptp_set_comp *)arg;
+		fec_set_drift(priv, p_comp);
+		break;
+	case PTP_GET_ORIG_COMP:
+		((struct ptp_get_comp *)arg)->dw_origcomp = FEC_PTP_ORIG_COMP;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return retval;
+}
+
+static const struct file_operations ptp_fops = {
+	.owner	= THIS_MODULE,
+	.llseek	= NULL,
+	.read	= NULL,
+	.write	= NULL,
+	.unlocked_ioctl	= ptp_unlocked_ioctl,
+	.open	= ptp_open,
+	.release = ptp_release,
+};
+
+static int init_ptp(void)
+{
+	if (register_chrdev(PTP_MAJOR, "ptp", &ptp_fops))
+		printk(KERN_ERR "Unable to register PTP deivce as char\n");
+
+	return 0;
+}
+
+static void ptp_free(void)
+{
+	/*unregister the PTP device*/
+	unregister_chrdev(PTP_MAJOR, "ptp");
+}
+
+
+
+/*
+ * Resource required for accessing 1588 Timer Registers.
+ */
+int fec_ptp_init(struct fec_ptp_private *priv, int id)
+{
+	fec_ptp_init_circ(&(priv->rx_time_sync));
+	fec_ptp_init_circ(&(priv->rx_time_del_req));
+	fec_ptp_init_circ(&(priv->rx_time_pdel_req));
+	fec_ptp_init_circ(&(priv->rx_time_pdel_resp));
+
+	spin_lock_init(&priv->ptp_lock);
+	spin_lock_init(&priv->cnt_lock);
+	ptp_private[id] = priv;
+	if (id == 0)
+		init_ptp();
+	return 0;
+}
+EXPORT_SYMBOL(fec_ptp_init);
+
+void fec_ptp_cleanup(struct fec_ptp_private *priv)
+{
+
+	if (priv->rx_time_sync.buf)
+		vfree(priv->rx_time_sync.buf);
+	if (priv->rx_time_del_req.buf)
+		vfree(priv->rx_time_del_req.buf);
+	if (priv->rx_time_pdel_req.buf)
+		vfree(priv->rx_time_pdel_req.buf);
+	if (priv->rx_time_pdel_resp.buf)
+		vfree(priv->rx_time_pdel_resp.buf);
+
+	ptp_free();
+}
+EXPORT_SYMBOL(fec_ptp_cleanup);
--- /dev/null
+++ b/drivers/net/fec_1588.h
@@ -0,0 +1,195 @@
+/*
+ * drivers/net/fec_1588.h
+ *
+ * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#ifndef FEC_1588_H
+#define FEC_1588_H
+
+#include <linux/circ_buf.h>
+#include "fec.h"
+
+#define fec_readl(addr) \
+	({ unsigned int __v = (*(volatile unsigned int *) (addr)); __v; })
+
+#define fec_writel(b, addr) (void)((*(volatile unsigned int *) (addr)) = (b))
+
+#define FALSE			0
+#define TRUE			1
+
+/* FEC 1588 register bits */
+#define FEC_T_CTRL_CAPTURE		0x00000800
+#define FEC_T_CTRL_RESTART		0x00000200
+#define FEC_T_CTRL_PERIOD_RST		0x00000010
+#define FEC_T_CTRL_PINPER		0x00000080
+#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_T_INC_40MHZ			8
+#define FEC_ATIME_40MHZ			125000000
+
+#define FEC_T_PERIOD_ONE_SEC		0x3B9ACA00
+
+/* IEEE 1588 definition */
+#define FEC_ECNTRL_TS_EN	0x10
+#define PTP_MAJOR		232	/*the temporary major number
+						 *used by PTP driver, the major
+						 *number 232~239 is unassigned*/
+
+#define DEFAULT_PTP_RX_BUF_SZ		2048
+#define PTP_MSG_SYNC			0x0
+#define PTP_MSG_DEL_REQ			0x1
+#define PTP_MSG_P_DEL_REQ		0x2
+#define PTP_MSG_P_DEL_RESP		0x3
+#define PTP_MSG_DEL_RESP		0x4
+#define PTP_MSG_ALL_OTHER		0x5
+
+#define PTP_GET_TX_TIMESTAMP		0x1
+#define PTP_GET_RX_TIMESTAMP		0x9
+#define PTP_SET_RTC_TIME		0x3
+#define PTP_SET_COMPENSATION		0x4
+#define PTP_GET_CURRENT_TIME		0x5
+#define PTP_FLUSH_TIMESTAMP		0x6
+#define PTP_ADJ_ADDEND			0x7
+#define PTP_GET_ORIG_COMP		0x8
+#define PTP_GET_ADDEND			0xB
+#define PTP_GET_RX_TIMESTAMP_PDELAY_REQ		0xC
+#define PTP_GET_RX_TIMESTAMP_PDELAY_RESP	0xD
+
+#define FEC_PTP_DOMAIN_DLFT		0xe0000181
+#define FEC_PTP_IP_OFFS			0x0
+#define FEC_PTP_UDP_OFFS		0x14
+#define FEC_PTP_MSG_TYPE_OFFS		0x1C
+#define FEC_PTP_SEQ_ID_OFFS		0x3A
+#define FEC_PTP_COR_NS			0x24
+#define FEC_PTP_CTRL_OFFS		0x3C
+#define FEC_PACKET_TYPE_UDP		0x11
+
+#define FEC_PTP_ORIG_COMP		0x15555
+
+/* PTP standard time representation structure */
+struct ptp_time {
+	u64 sec;	/* seconds */
+	u32 nsec;	/* nanoseconds */
+};
+
+/* Structure for PTP Time Stamp */
+struct fec_ptp_data_t {
+	int		key;
+	struct ptp_time	ts_time;
+};
+
+/* interface for PTP driver command GET_TX_TIME */
+struct ptp_ts_data {
+	/* PTP version */
+	u8 version;
+	/* PTP source port ID */
+	u8 spid[10];
+	/* PTP sequence ID */
+	u16 seq_id;
+	/* PTP message type */
+	u8 message_type;
+	/* PTP timestamp */
+	struct ptp_time ts;
+};
+
+/* interface for PTP driver command SET_RTC_TIME/GET_CURRENT_TIME */
+struct ptp_rtc_time {
+	struct ptp_time rtc_time;
+};
+
+/* interface for PTP driver command SET_COMPENSATION */
+struct ptp_set_comp {
+	u32 drift;
+	u32 o_ops;
+};
+
+/* interface for PTP driver command GET_ORIG_COMP */
+struct ptp_get_comp {
+	/* the initial compensation value */
+	u32 dw_origcomp;
+	/* the minimum compensation value */
+	u32 dw_mincomp;
+	/*the max compensation value*/
+	u32 dw_maxcomp;
+	/*the min drift applying min compensation value in ppm*/
+	u32 dw_mindrift;
+	/*the max drift applying max compensation value in ppm*/
+	u32 dw_maxdrift;
+};
+
+struct ptp_time_correct {
+	u32 corr_period;
+	u32 corr_inc;
+};
+
+/* PTP message version */
+#define PTP_1588_MSG_VER_1	1
+#define PTP_1588_MSG_VER_2	2
+
+struct fec_ptp_private {
+	void __iomem *hwp;
+
+	struct	circ_buf rx_time_sync;
+	struct	circ_buf rx_time_del_req;
+	struct	circ_buf rx_time_pdel_req;
+	struct	circ_buf rx_time_pdel_resp;
+	spinlock_t ptp_lock;
+	spinlock_t cnt_lock;
+
+	u64	prtc;
+	struct ptp_time	txstamp;
+};
+
+#ifdef CONFIG_FEC_1588
+extern int fec_ptp_init(struct fec_ptp_private *priv, int id);
+extern void fec_ptp_cleanup(struct fec_ptp_private *priv);
+extern int fec_ptp_start(struct fec_ptp_private *priv);
+extern void fec_ptp_stop(struct fec_ptp_private *priv);
+extern int fec_ptp_do_txstamp(struct sk_buff *skb);
+extern void fec_ptp_store_txstamp(struct fec_ptp_private *priv);
+extern void fec_ptp_store_rxstamp(struct fec_ptp_private *priv,
+				  struct sk_buff *skb,
+				  struct bufdesc *bdp);
+#else
+static inline int fec_ptp_init(struct fec_ptp_private *priv, int id)
+{
+	return 1;
+}
+static inline void fec_ptp_cleanup(struct fec_ptp_private *priv) { }
+static inline int fec_ptp_start(struct fec_ptp_private *priv)
+{
+	return 1;
+}
+static inline void fec_ptp_stop(struct fec_ptp_private *priv) {}
+static inline int fec_ptp_do_txstamp(struct sk_buff *skb)
+{
+	return 0;
+}
+static inline void fec_ptp_store_txstamp(struct fec_ptp_private *priv) {}
+static inline void fec_ptp_store_rxstamp(struct fec_ptp_private *priv,
+					 struct sk_buff *skb,
+					 struct bufdesc *bdp) {}
+#endif /* 1588 */
+
+#endif